WO2013035646A1 - 無機繊維成形体 - Google Patents
無機繊維成形体 Download PDFInfo
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- WO2013035646A1 WO2013035646A1 PCT/JP2012/072227 JP2012072227W WO2013035646A1 WO 2013035646 A1 WO2013035646 A1 WO 2013035646A1 JP 2012072227 W JP2012072227 W JP 2012072227W WO 2013035646 A1 WO2013035646 A1 WO 2013035646A1
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- inorganic fiber
- molded body
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- fiber molded
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/71—Ceramic products containing macroscopic reinforcing agents
- C04B35/78—Ceramic products containing macroscopic reinforcing agents containing non-metallic materials
- C04B35/80—Fibres, filaments, whiskers, platelets, or the like
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/44—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminates
- C04B35/443—Magnesium aluminate spinel
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4209—Inorganic fibres
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
- D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/58—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
- D04H1/587—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives characterised by the bonding agents used
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/32—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond
- D06M11/36—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond with oxides, hydroxides or mixed oxides; with salts derived from anions with an amphoteric element-oxygen bond
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/32—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond
- D06M11/36—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond with oxides, hydroxides or mixed oxides; with salts derived from anions with an amphoteric element-oxygen bond
- D06M11/44—Oxides or hydroxides of elements of Groups 2 or 12 of the Periodic Table; Zincates; Cadmates
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/32—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond
- D06M11/36—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond with oxides, hydroxides or mixed oxides; with salts derived from anions with an amphoteric element-oxygen bond
- D06M11/45—Oxides or hydroxides of elements of Groups 3 or 13 of the Periodic Table; Aluminates
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
- F16L59/026—Mattresses, mats, blankets or the like
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/52—Constituents or additives characterised by their shapes
- C04B2235/5208—Fibers
- C04B2235/5216—Inorganic
- C04B2235/522—Oxidic
- C04B2235/5224—Alumina or aluminates
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/52—Constituents or additives characterised by their shapes
- C04B2235/5208—Fibers
- C04B2235/5216—Inorganic
- C04B2235/522—Oxidic
- C04B2235/5228—Silica and alumina, including aluminosilicates, e.g. mullite
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/52—Constituents or additives characterised by their shapes
- C04B2235/5208—Fibers
- C04B2235/5252—Fibers having a specific pre-form
- C04B2235/5256—Two-dimensional, e.g. woven structures
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- C—CHEMISTRY; METALLURGY
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/52—Constituents or additives characterised by their shapes
- C04B2235/5208—Fibers
- C04B2235/5264—Fibers characterised by the diameter of the fibers
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/60—Aspects relating to the preparation, properties or mechanical treatment of green bodies or pre-forms
- C04B2235/616—Liquid infiltration of green bodies or pre-forms
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- C—CHEMISTRY; METALLURGY
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- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
- C04B2235/9607—Thermal properties, e.g. thermal expansion coefficient
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2101/00—Inorganic fibres
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
- Y10T442/2008—Fabric composed of a fiber or strand which is of specific structural definition
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
- Y10T442/2926—Coated or impregnated inorganic fiber fabric
Definitions
- the present invention relates to an inorganic fiber molded body. Specifically, it is extremely lightweight and has cushioning properties, and is excellent in thermal shock resistance and mechanical impact resistance, as well as scale resistance, and has a shrinkage ratio when heated at high temperature. It relates to a small number of inorganic fiber molded bodies.
- inorganic fiber molded bodies slurry containing inorganic fibers such as alumina fibers, silica fibers, mullite (aluminosilicate) fibers, inorganic particles, inorganic binders, organic binders, etc. is dehydrated and then fired. Is known. Since this inorganic fiber molded body is relatively light and easy to process and has excellent heat insulating properties, it is used as a fireproof heat insulating material for high-temperature industrial furnaces.
- inorganic fiber molded body is relatively light and easy to process and has excellent heat insulating properties, it is used as a fireproof heat insulating material for high-temperature industrial furnaces.
- Aggregates needle blankets
- blade blocks high-temperature insulation materials
- thermal shock resistance used (see, for example, Patent Document 1).
- the irregular refractories obtained by these construction methods generally have a problem that they are brittle because they have many voids, and cracks and the like occur due to thermal shock and mechanical shock.
- on-site spraying and pouring not only requires complicated work, but also has a problem that the working environment is significantly lowered, such as a large amount of finely divided inorganic fibers flying in the air.
- An object of the present invention is to provide an inorganic fiber molded body that is excellent in scale resistance, thermal shock resistance, and mechanical shock resistance and that suppresses shrinkage during high-temperature heating.
- an inorganic fiber molded body obtained by impregnating an inorganic fiber aggregate with a liquid substance of a spinel compound precursor, drying, and further firing to oxidize the precursor has reduced shrinkage during heating.
- it has excellent scale resistance, thermal shock resistance, and mechanical shock resistance.
- the present invention has been achieved based on the above findings, and the gist of the present invention is represented by a general formula: Mg x Al y O 4 (where y / x ⁇ 2 atomic ratio) in a needle blanket of inorganic fibers. It is impregnated with a liquid material of a spinel compound precursor, dried, and further fired to form an inorganic fiber molded body obtained by oxidizing the precursor.
- the inorganic fiber molded body of the present invention is an excellent inorganic fiber molded body having excellent thermal shock resistance, mechanical shock resistance, and scale resistance, and also having a good balance of physical properties with suppressed shrinkage during high-temperature heating. Therefore, the inorganic fiber molded body of the present invention is suitable as a heat insulating material for burner tiles and surrounding pipes in a high temperature furnace. Among them, for example, the effect is particularly remarkable for an object that is inevitably subjected to large deformation when laying an inorganic fiber molded body, such as a skid pipe having a high curvature (having a relatively small diameter). .
- a needle blanket of inorganic fibers is impregnated with a liquid material that is a precursor of a spinel compound represented by the general formula: Mg x Al y O 4 (where y / x ⁇ 2 atomic ratio). Then, it is dried and further fired to oxidize the precursor.
- the bulk density of the needle blanket before the precursor after drying calcining carrying a spinel compound 0.45 g / cm 3 or less beyond the normal 0.20 g / cm 3, preferably It is 0.25 to 0.35 g / cm 3 , more preferably 0.25 to 0.30 g / cm 3 . If the bulk density is too small, the voids in the inorganic fiber molded body increase, the shrinkage rate during heating becomes too high, and the mechanical strength as the molded body is insufficient, which is not preferable.
- the cushioning property and toughness of the inorganic fiber molded body are remarkably reduced, and the inorganic fiber molded body is deformed and laid, for example, laying on a skid pipe having a small diameter. It becomes difficult.
- the needle blanket used in the present invention is an inorganic fiber aggregate that has been subjected to a needling treatment.
- Inorganic fiber There is no restriction
- alumina / silica fibers, particularly polycrystalline alumina / silica fibers are preferred from the viewpoint of heat resistance, fiber strength (toughness), and safety.
- composition ratio (mass ratio) of alumina / silica fiber is preferably in the range of 65 to 98/35 to 2 called mullite composition or high alumina composition, more preferably 70 to 95/30 to 5, particularly preferably in the range of 70 to 74/30 to 26.
- the inorganic fiber constituting the needle blanket is preferably 80% by mass or more, particularly 90% by mass or more, and particularly the total amount thereof is a polycrystalline alumina / silica fiber having the above mullite composition.
- the inorganic fibers in the needle blanket are preferably substantially free of fibers having a fiber diameter of 3 ⁇ m or less.
- substantially free of fibers having a fiber diameter of 3 ⁇ m or less means that the fibers having a fiber diameter of 3 ⁇ m or less is 0.1 mass% or less of the total inorganic fiber mass.
- the average fiber diameter of the inorganic fibers in the needle blanket is arbitrary, but is usually 5 to 7 ⁇ m. If the average fiber diameter of the inorganic fiber is too large, the repulsive force and toughness of the needle blanket will be reduced. Conversely, if the fiber is too thin, the amount of dust that will float in the air will increase. Probability of inclusion increases.
- the needle blanket having the above-mentioned preferred average fiber diameter and substantially free of inorganic fibers having a fiber diameter of 3 ⁇ m or less is used in the production of inorganic fiber aggregates by the precursor fiberization method described later, and the viscosity of the spinning solution It can be obtained by controlling the air flow used for the spinning nozzle and controlling the drying of the drawn yarn.
- the needle blanket is obtained by subjecting an aggregate of inorganic fiber precursors to needling treatment.
- the needle density may be appropriately selected and determined, but is usually 2 to 200 strokes / cm 2 , preferably 2 to 150 strokes / cm 2 , more preferably 2 to 100 strokes / cm 2 , and particularly preferably 2 to 50 strokes. It is a strike / cm 2 . If the needle density is too low, problems such as a decrease in thickness uniformity and thermal shock resistance as an inorganic fiber molded article may occur. On the other hand, if it is too high, the fiber may be damaged, and it may easily shrink after firing.
- the areal density of the needle blanket is not particularly limited, may be appropriately selected but is usually 1000 ⁇ 4000g / m 2, preferably 1500 ⁇ 3800g / m 2, more preferably 2000 ⁇ 3600g / m 2. If the surface density of the needle blanket is too small, the inorganic fiber content in the inorganic fiber molded body is lowered, and only an extremely thin molded body can be obtained, and the performance as an inorganic fiber molded body for heat insulation may be lowered. On the other hand, if the surface density is too large, the inorganic fiber content is too large, and it becomes difficult to control the thickness by needling treatment.
- the thickness of the needle blanket is not particularly limited and may be appropriately selected depending on the application, but is usually about 5 to 50 mm and the shape is a mat.
- the bulk density is arbitrary, but the bulk density is preferably higher in order to obtain a dense inorganic fiber molded body after impregnation with the liquid material of the precursor of the spinel compound, and usually 0.05 g / cm 3. As mentioned above, Preferably it is 0.06 g / cm ⁇ 3 > or more, More preferably, it is 0.1 g / cm ⁇ 3 > or more. The upper limit is usually 0.25 g / cm 3 .
- a plurality of needle blankets may be used. In this case, a plurality of needle blankets to be used may have different surface densities or thicknesses. Those satisfying the density are preferred.
- the method for producing the needle blanket is not particularly limited, and any conventionally known method can be adopted.
- the needle blanket used in the present invention is not limited to an alumina / silica-based fiber assembly. As described above, it may be an aggregate made of silica, zirconia, spinel, titania or a composite fiber thereof.
- Basic aluminum chloride; Al (OH) 3-x Cl x can be prepared, for example, by dissolving metallic aluminum in hydrochloric acid or an aqueous aluminum chloride solution.
- the value of x in the above chemical formula is usually 0.45 to 0.54, preferably 0.5 to 0.53.
- Silica sol is preferably used as the silicon compound, but water-soluble silicon compounds such as tetraethyl silicate and water-soluble siloxane derivatives can also be used.
- the organic polymer for example, water-soluble polymer compounds such as polyvinyl alcohol, polyethylene glycol, and polyacrylamide are preferably used. Their degree of polymerization is usually 1000 to 3000.
- the ratio of aluminum derived from basic aluminum chloride to silicon derived from silicon compound is usually 99: 1 to 65:35, preferably 99: 1, in terms of the mass ratio of Al 2 O 3 and SiO 2.
- the aluminum concentration is 170 to 210 g / L
- the organic polymer concentration is 20 to 50 g / L.
- the amount of the silicon compound in the spinning solution is less than the above range, the alumina constituting the short fiber is easily converted to ⁇ -alumina, and the short fiber is easily embrittled due to coarsening of the alumina particles.
- the amount of the silicon compound in the spinning solution is larger than the above range, the amount of silica (SiO 2 ) produced together with mullite (3Al 2 O 3 .2SiO 2 ) increases, and the heat resistance tends to decrease.
- the concentration of aluminum in the spinning solution is less than 170 g / L or the concentration of the organic polymer is less than 20 g / L, the alumina / silica fiber is obtained without obtaining an appropriate viscosity of the spinning solution.
- the fiber diameter becomes smaller. That is, as a result of too much free water in the spinning solution, the drying speed during spinning by the blowing method is slow, the drawing progresses excessively, the fiber diameter of the spun precursor fiber changes, and at a predetermined average fiber diameter In addition, short fibers having a sharp fiber diameter distribution cannot be obtained.
- productivity is lowered.
- the viscosity is too high to become a spinning solution.
- a preferable concentration of aluminum in the spinning solution is 180 to 200 g / L, and a preferable concentration of the organic polymer is 30 to 40 g / L.
- the above spinning solution is prepared by adding the silicon compound and the organic polymer in an amount corresponding to the Al 2 O 3 : SiO 2 ratio to the basic aluminum chloride aqueous solution so that the concentrations of the aluminum and the organic polymer are in the above range. Prepared by concentrating.
- Spinning spininning of the spinning solution
- the structure of the spinning nozzle used in the spinning is not particularly limited.
- the spinning liquid flow is preferably a parallel flow, and the parallel air flow is sufficiently rectified to come into contact with the spinning liquid.
- a sufficiently stretched fiber is first formed from the spinning solution under conditions where evaporation of moisture and decomposition of the spinning solution are suppressed, and then the fiber is quickly dried.
- the aggregate of alumina / silica-based fiber precursor includes an endless belt made of wire mesh so as to be substantially perpendicular to the spinning air flow, and the alumina / silica-based fiber precursor is contained in the endless belt while rotating the endless belt. It can be recovered as a continuous sheet (thin layer sheet) by an accumulator having a structure in which the spinning airflow collides. The thin layer sheets can be stacked to obtain an aggregate of alumina / silica fiber precursors.
- ⁇ Needling process> The aggregate of the alumina / silica fiber precursor obtained by spinning is then subjected to needling treatment.
- This needling treatment is preferably performed under conditions that satisfy the needle density described above.
- Firing after the needling treatment is usually performed at a temperature of 900 ° C. or higher, preferably 1000 to 1300 ° C.
- the firing temperature is less than 900 ° C.
- only weak alumina / silica fibers having low strength can be obtained because of insufficient crystallization
- the firing temperature exceeds 1300 ° C., the crystal grain growth of the fibers proceeds. Only weak alumina / silica fibers with low strength can be obtained.
- the needle blanket manufactured as described above is impregnated with the liquid material of the precursor of the spinel compound, dried, and further fired to convert the precursor into an oxide of the present invention.
- An example of the manufacturing procedure of the body will be described.
- the spinel compound precursor liquid material used in the present invention contains a spinel compound precursor represented by the general formula: Mg x Al y O 4 (y / x ⁇ 2 atomic ratio). Such a precursor can be easily prepared using, for example, alumina and magnesia sols.
- the particle diameter of the raw material oxide is usually 1 ⁇ m or less.
- Aluminum compounds and magnesium compounds can be used instead of alumina and magnesia.
- aluminum compounds include hydrous alumina compounds such as alumina hydroxide and boehmite, and aluminum salts such as aluminum chloride, aluminum acetate, aluminum lactate, and aluminum nitrate.
- magnesium compounds include magnesium chloride, magnesium nitrate, and acetic acid. Examples thereof include magnesium salts such as magnesium, magnesium hydroxide, and magnesium carbonate.
- Aluminum compounds and magnesium compounds are used in the form of sols, slurries, and solutions.
- As the dispersion medium or solvent water, an organic solvent such as alcohol, or a mixture thereof is used.
- polymer components, such as polyvinyl alcohol may contain.
- a dispersion stabilizer may be added to increase the stability of the compound in the sol, slurry, or solution. Examples of the dispersion stabilizer include acetic acid, lactic acid, hydrochloric acid, nitric acid and the like.
- the general formula can also be described as MgO x Al y O 3 (where y / x ⁇ 2 atomic ratio).
- the amount of the aluminum compound and magnesium compound used is determined in terms of oxide.
- y / x (atomic ratio) in the above general formula is 2 or more.
- the upper limit of y / x (atomic ratio) is generally 40.
- y / x (atomic ratio) is preferably sequentially in the order of 2 to 30, 2 to 26, 2 to 15, 6 to 10, and 6 to 8. If the alumina ratio is too high, the scale resistance of the inorganic fiber molded body may be reduced. Conversely, if the magnesia ratio is too high, the shrinkage ratio may be insufficiently reduced.
- the solid content concentration of the liquid substance as the precursor of the spinel compound is usually 3 to 15% by mass, preferably 5 to 12% by mass. If the solid content concentration is too low, the desired impregnation amount cannot be obtained, and the desired thickness, hardness, mechanical strength, scale resistance, etc. may not be obtained in the inorganic fiber molded body. On the other hand, if the solid content concentration is too high, impregnation into the needle blanket becomes difficult, so that workability is lowered, and various physical properties such as heat insulation and impact resistance in the inorganic fiber molded body may be lowered.
- the method for impregnating the needle blanket with the liquid precursor material is not particularly limited, and any conventionally known method can be used. Specifically, for example, a method may be mentioned in which a needle blanket is placed in a mold or the like, dipped in a precursor liquid material, and then pulled up. This immersion may be repeated a plurality of times. In addition, after impregnating the precursor liquid material, the excess precursor liquid material may be removed by suction molding such as vacuum suction, or pressurization or compression molding, and may be subjected to the next drying step.
- suction molding such as vacuum suction, or pressurization or compression molding
- the amount of the precursor liquid material impregnated into the needle blanket is appropriately determined depending on the target bulk density and thickness of the inorganic fiber molded body, hardness, mechanical strength, thermal characteristics, production cost, etc.
- parts by mass of the precursor of the spinel compound based on 100 parts by mass of the inorganic fiber of the needle blanket it is usually 10 to 100 parts by mass, preferably 10 to 50 parts by mass.
- the amount of the precursor liquid material impregnated in the needle blanket is too small, the desired thickness, hardness, mechanical strength, scale resistance, etc. may not be obtained in the inorganic fiber molded body. On the contrary, if the amount is too large, the shrinkage rate during heating becomes too high, and the production cost also deteriorates.
- the needle blanket impregnated with the spinel compound precursor liquid substance is usually dried under conditions of 80 to 150 ° C. If the drying temperature is too low, it cannot be sufficiently dried, and if it is too high, the solid content may concentrate near the surface of the precursor liquid substance-impregnated needle blanket. Unevenness in scale resistance in the direction may occur. Moreover, drying may pass through a drying process by baking directly from the undried state after an impregnation.
- a needle blanket carrying a spinel compound precursor is fired to oxidize the precursor.
- spinel (MgO ⁇ Al 2 O 3 ) that is a composite oxide is generated.
- an oxide having a large alumina component is generated.
- Such an oxide may be either a stoichiometric compound or a non-stoichiometric compound.
- the firing conditions for oxidizing the precursor of the spinel compound can be appropriately selected from known firing conditions as a spinel manufacturing method.
- the heat insulating material of this invention consists of an inorganic fiber molded object as mentioned above. That is, since the inorganic fiber molded body of the present invention is composed of an inorganic material, it has excellent fire resistance and heat resistance, and also excellent in scale resistance, thermal shock resistance and mechanical shock resistance. It can be suitably used as a high temperature industrial furnace refractory heat insulating material.
- a fiber assembly carrying a spinel compound precursor and dried and then fired is processed into an area of 150 mm ⁇ 150 mm, and a steel ball having a mass of 550 g is dropped vertically from a height of 1 m to the central portion, and the appearance (destruction) The state was observed.
- the fiber assembly before drying and supporting the spinel compound precursor is processed into an area of 150 mm ⁇ 150 mm, and the surface direction is 3 platinum pins 5 mm inside from each end face, one in the center.
- Nine pins were set, and the distance from any reference pin to each pin was measured with a magnifying microscope with vernier.
- the thickness direction was measured with eight calipers. After that, it was put in an electric furnace, heated up to 1,500 ° C. in 5 hours, held for 8 hours, then taken out after cooling down, and measured in the surface direction and thickness direction by the same method to obtain the shrinkage rate.
- Example 1-6 A basic aluminum chloride aqueous solution having an aluminum concentration of 170 g / L and an Al / Cl (atomic ratio) of 1.8 was prepared. The aluminum content was quantified by a chelate titration method using EDTA. Next, silica sol and polyvinyl alcohol are added to the above aqueous solution and then concentrated, and the ratio of aluminum to silicon (weight ratio of Al 2 O 3 and SiO 2 ) is 72:28, the total of alumina and silica converted to oxide mass. A spinning solution having a mass concentration of about 30% by mass and a viscosity of 40 poise (measured by a rotational viscometer at 25 ° C.) was obtained.
- the spinning solution was spun by a blowing method and then collected to obtain a mat-like fiber aggregate of alumina / silica fiber precursor.
- This mat-like fiber aggregate is subjected to needling, fired at 1200 ° C., 600 mm wide, and a polycrystalline alumina / silica fiber aggregate having a thickness and physical properties (surface density and bulk density) shown in Table 1 ( Hereinafter, it may be referred to as “raw fabric”).
- the needling was performed by a needle punching machine with a needle density of 3 strokes / cm 2 or more.
- the average fiber diameter (average value of 100 fibers) of the alumina / silica fiber was 5.5 ⁇ m, and the minimum fiber diameter was 3.5 ⁇ m.
- This raw fabric was processed to approximately 300 mm ⁇ 300 mm, and an inorganic fiber aggregate composed of the number of the sheets shown in Table 1 was impregnated with a precursor (alumina and magnesia) sol having a solid content concentration shown in Table 1. After that, spacers with a predetermined thickness are arranged on the four sides, held with the metal fittings in a compressed state to the thickness of the spacers, and sucked from the bottom surface of the original fabric with a suction force of 3.0 m 3 / min using a spiral fan.
- a precursor alumina and magnesia
- the amount of impregnation of the spinel compound precursor (alumina and magnesia) with respect to 100 parts by mass of the alumina / silica fiber of the board-like inorganic fiber molded body is as shown in Table 1.
- the precursor sol of the spinel compound was prepared by dispersing alumina sol (manufactured by Nissan Chemical Co., Ltd .: trade name “Alumina Sol-200”) and magnesium acetate powder in water by adjusting the quantity ratio. It is a sol.
- the amount ratio of alumina / magnesia (oxide mass ratio) constituting the sol is as shown in Table 1. Table 2 shows the evaluation results of these board-like inorganic fiber molded bodies.
- Comparative Example 1 As the inorganic fiber, an alumina / silica fiber having an alumina / silica composition ratio of 72/28 (mass ratio) obtained in the same manner as in Example 1 was adjusted to a fiber length of about 200 ⁇ m with a dry defibrator, 200 g of the defibrated alumina / silica fiber, 30 g of alumina powder, 50 g of mullite powder, 20 g of starch, 10 g of silica sol, and 2 g of a flocculant were mixed in 10 L of water with a pulper, and then dehydrated and molded. A board-like inorganic fiber molded article having the thickness and bulk density shown was obtained.
- the average fiber diameter and the minimum fiber diameter of the alumina / silica fibers contained in this board-like inorganic fiber molded body were as shown in Table 1.
- the evaluation results of this board-like inorganic fiber molded body are shown in Table 2.
- Comparative Example 2-4 As shown in Table 1, needle-punching was performed on the fiber aggregate on the mat of an alumina / silica fiber precursor having a mullite composition having an alumina / silica mass ratio of 72/28, which was obtained as an inorganic fiber in the same manner as in the Examples. An inorganic fiber aggregate of less than 0.10 g / cm 3 was obtained.
- the inorganic sol the alumina sol (manufactured by Nissan Chemical Industries: Alumina sol-200) and a sol prepared by dispersing magnesium acetate powder in water were adjusted as shown in Table 1 in terms of oxide composition, and the thicknesses shown in Table 2 A bulk-like board-like inorganic fiber molded body was obtained.
- the inorganic fiber molded body of the present invention has scale resistance and is excellent in thermal shock resistance and mechanical shock resistance, no cracks are observed on the surface or crack generation is extremely small. And it is clear that it is an excellent inorganic fiber molded body having a small shrinkage ratio when heated at high temperature.
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Abstract
Description
本発明の無機繊維成形体は、無機繊維のニードルブランケットに、一般式:MgxAlyO4(但しy/x≧2原子比)で表されるスピネル系化合物の前駆体の液状物質を含浸させた後に乾燥し、更に焼成して当該前駆体を酸化物化してなるものである。
スピネル系化合物の前駆体の液状物質を含浸させるニードルブランケットについて説明する。本発明に用いるニードルブランケットは、ニードリング処理が施された無機繊維集合体である。
ニードルブランケットを構成する無機繊維としては特に制限がなく、シリカ、アルミナ/シリカ、これらを含むジルコニア、スピネル、チタニア等の単独、又は複合繊維が挙げられる。中でも耐熱性、繊維強度(靭性)、安全性の点で、アルミナ/シリカ系繊維、特に多結晶質アルミナ/シリカ系繊維であることが好ましい。
ニードルブランケットは、無機繊維前駆体の集合体にニードリング処理を施したものである。このニードリングによって、得られる無機繊維集合体を構成する無機繊維同士が絡んだ、強固な無機繊維集合体となるだけでなく、無機繊維集合体の厚みを調整することも可能となる。ニードル密度は、適宜選択して決定すればよいが、通常2~200打/cm2、好ましくは2~150打/cm2、更に好ましくは2~100打/cm2、特に好ましくは2~50打/cm2であるこ。このニードル密度が低過ぎると、無機繊維成形体としての厚み均一性や耐熱衝撃性が低下する等の問題が生ずる恐れがある。逆に高過ぎても、繊維を傷め、焼成後に収縮し易くなる恐れがある。
ニードルブランケットの面密度は、特に制限は無く、適宜選択すればよいが、通常1000~4000g/m2、好ましくは1500~3800g/m2、更に好ましくは2000~3600g/m2である。このニードルブランケットの面密度が小さ過ぎると、無機繊維成形体における無機繊維含有量が低下し、極薄い成形体しか得られず、断熱用無機繊維成形体としての性能が低下する場合がある。逆に面密度が大き過ぎると、この無機繊維含有量が多すぎてしまい、ニードリング処理による厚み制御が困難となる。
ニードルブランケットの製造方法は、特に制限されず、従来公知の任意の方法を採用することが出来る。前駆体繊維化法により無機繊維前駆体の集合体を得る工程と、得られた無機繊維前駆体の集合体にニードリング処理を施す工程と、ニードリング処理された無機繊維前駆体の集合体を焼成して無機繊維の集合体とする焼成工程とを経て製造される。
前駆体繊維化法によりアルミナ/シリカ系繊維のマット状集合体を製造するには、まず、塩基性塩化アルミニウム、珪素化合物、増粘剤としての有機重合体及び水を含有する紡糸液をブローイング法で紡糸してアルミナ/シリカ繊維前駆体の集合体を得る。
塩基性塩化アルミニウム;Al(OH)3-xClxは、例えば、塩酸又は塩化アルミニウム水溶液に金属アルミニウムを溶解させることにより調製することができる。上記の化学式におけるxの値は、通常0.45~0.54、好ましくは0.5~0.53である。珪素化合物としては、シリカゾルが好適に使用されるが、その他にはテトラエチルシリケートや水溶性シロキサン誘導体などの水溶性珪素化合物を使用することもできる。有機重合体としては、例えば、ポリビニルアルコール、ポリエチレングリコール、ポリアクリルアミド等の水溶性高分子化合物が好適に使用される。これらの重合度は、通常1000~3000である。
紡糸(紡糸液の繊維化)は、通常、高速の紡糸気流中に紡糸液を供給するブローイング法によって行われ、これにより、アルミナ/シリカ系繊維前駆体が得られる。上記の紡糸の際に使用する紡糸ノズルの構造は、特に制限はないが、例えば、特許第2602460号公報に記載されている様な、エアーノズルより吹き出される空気流と紡糸液供給ノズルより押し出される紡糸液流とは並行流となり、しかも、空気の並行流は充分に整流されて紡糸液と接触する構造のものが好ましい。
紡糸により得られたアルミナ/シリカ系繊維前駆体の集合体は、次いでニードリング処理を施す。このニードリング処理は、前述のニードル密度を満たすような条件で行うことが好ましい。
ニードリング処理後の焼成は、通常900℃以上、好ましくは1000~1300℃の温度で行う。焼成温度が900℃未満の場合は結晶化が不十分なため強度の小さい脆弱なアルミナ/シリカ系繊維しか得られず、焼成温度が1300℃を超える場合は繊維の結晶の粒成長が進行して強度の小さい脆弱なアルミナ/シリカ系繊維しか得られない。
次に、上述の様にして製造されるニードルブランケットにスピネル系化合物の前駆体の液状物質を含浸させた後に乾燥し、更に焼成して当該前駆体を酸化物化してなる本発明の無機繊維成形体について、その製造手順の一例を示して説明する。
本発明に用いるスピネル系化合物の前駆体の液状物質は、一般式:MgxAlyO4(但しy/x≧2原子比)で表されるスピネル系化合物の前駆体を含有する。斯かる前駆体は、例えば、アルミナ、マグネシアの各ゾルを用いて容易に調製することが出来る。原料の酸化物の粒子径は通常1μm以下である。
前駆体の液状物質をニードルブランケットに含浸させる方法としては、特に制限は無く、従来公知の任意の方法を使用できる。具体的には例えば、ニードルブランケットを型枠等に入れ、前駆体の液状物質に浸漬した後、引き上げる方法などが挙げられる。この浸漬は複数回数繰り返し行ってもよい。また前駆体の液状物質を含浸させた後は、真空吸引等の吸引成形、又は加圧、圧縮成形により余分な前駆体の液状物質を脱液して、次の乾燥工程に供してもよい。
スピネル系化合物の前駆体の液状物質を含浸させたニードルブランケットの乾燥は、通常80~150℃の条件下で行う。乾燥温度が低すぎると十分に乾燥できることができず、逆に高すぎると、前駆体の液状物質含浸ニードルブランケットの表層近傍に固形分が集中する可能性があるため、無機繊維成型体において、厚み方向の耐スケール性にむらが発生する場合がある。また、乾燥は、含浸後の未乾燥状態から直接焼成することで乾燥工程を経てもよい。
本発明においては、スピネル系化合物の前駆体を担持したニードルブランケットを焼成して当該前駆体を酸化物化する。これにより、一般式:MgxAlyO4において、y/x=2原子比で表される前駆体の場合は、複合酸化物であるスピネル(MgO・Al2O3)が生成する。y/x=2原子比を超える前駆体の場合は、アルミナ成分の多い酸化物が生成する。斯かる酸化物は、定比化合物及び不定比化合物の何れであってもよい。なお、スピネル系化合物の前駆体を酸化物化するための焼成条件は、スピネルの製法として公知の焼成条件から適宜選択することが出来る。
本発明の断熱材は、上述の様な無機繊維成形体よりなるものである。即ち、本発明の無機繊維成形体は、無機材料で構成されるため耐火断熱性に優れ、耐スケール性、耐熱衝撃性及び耐機械的衝撃性にも優れるため、バーナータイル、スキッドポスト用途等の高温用工業炉耐火断熱材として好適に用いることができる。
試料の質量を天秤にて測定する一方、試料の長さ、幅、厚さをノギスにて測定して体積を計算した後、質量を体積で割って求めた。
スピネル系化合物の前駆体を担持した乾燥後焼成前の繊維集合体を150mm×150mmの面積に加工し、質量550gの鋼球を1mの高さから中央部に垂直に落下させ、外観(破壊)状態を観察した。
スピネル系化合物の前駆体を担持した乾燥後焼成前の繊維集合体を1500℃の加熱炉で加熱した後取り出し、室温25℃に静置したアルミニウム板上にて急冷させたときの外観変化を目視で観察した。
スピネル系化合物の前駆体を担持した乾燥後焼成前の繊維集合体を150mm×150mmの面積に加工し、面方向は各端面から5mm内側に白金性ピンを3本ずつ、中央に1本の合計9本立て、任意の基準ピンから各ピンまでの距離をバーニア付拡大顕微鏡に測定した。厚み方向はノギスで8箇所測定した。この後電気炉に入れ、1,500℃まで5時間で昇温し、8時間保持した後、降温後に取出し、同様の方法で面方向、厚み方向の測定を行い、収縮率を求めた
スピネル系化合物の前駆体を担持した乾燥後焼成前の繊維集合体の表面に、5mm角で厚さ1mmの鉄ペレットを載せ、電気炉に入れ1500℃まで5時間で昇温し、3時間保持した後、降温後取り出して外観変化を観察した。酸化鉄の浸食度合いを深さ方向で判定し、全く浸食されない状態を10、厚さ方向に貫通した状態を1として10段階評価した。
アルミニウムの濃度が170g/L、Al/Cl(原子比)が1.8の塩基性塩化アルミニウム水溶液を調製した。アルミニウム含有量は、EDTAを用いたキレート滴定法より定量した。次いで、上記の水溶液にシリカゾルとポリビニルアルコールを加えた後に濃縮し、アルミニウムと硅素の比(Al2O3とSiO2の重量比)が72:28、酸化物質量に換算したアルミナとシリカの合計の質量濃度が約30質量%、粘度が40ポイズ(25℃における回転粘度計による測定値)の紡糸液を得た。この紡糸液をブローイング法で紡糸した後に集綿してアルミナ/シリカ系繊維前駆体のマット状繊維集合体を得た。このマット状繊維集合体にニードリングを施した後、1200℃で焼成し、幅600mmで、表1に示す厚さと物性(面密度および嵩密度)の多結晶質アルミナ/シリカ系繊維集合体(以下、「原反」と称す場合がある。)を得た。なお、上記のニードリングはニードルパンチング機械によりニードル密度3打/cm2以上行った。
無機繊維として、実施例1と同様に得られたアルミナ/シリカ組成比が72/28(質量比)のアルミナ/シリカ系繊維を、乾式解繊機にて繊維長約200μmに調整したものを用い、この解繊したアルミナ/シリカ系繊維200g、アルミナ粉30g、ムライト粉50g、でんぷん質20g、シリカゾル10g、及び凝集剤2gを、水10Lにパルパーにて混合した後、脱水成形して、表1に示す厚み及び嵩密度のボード状無機繊維成形体を得た。
無機繊維として実施例と同様にして得られた、アルミナ/シリカ質量比が72/28のムライト組成のアルミナ/シリカ系繊維前駆体のマット上繊維集合体にニードルパンチを行い、表1に示すとおり0.10g/cm3未満の無機繊維集合体を得た。
無機質ゾルとして、前記アルミナゾル(日産化学製:アルミナゾル-200)と酢酸マグネシウム粉末を水に分散させて調整したゾルとを酸化物組成比で表1に示すとおりに調整し、表2に示す厚み及び嵩密度のボード状無機繊維成形体を得た。
Claims (12)
- 無機繊維のニードルブランケットに一般式:MgxAlyO4(但しy/x≧2原子比)で表されるスピネル系化合物の前駆体の液状物質を含浸させた後に乾燥し、更に焼成して当該前駆体を酸化物化してなる無機繊維成形体。
- スピネル系化合物の前駆体を担持した乾燥後焼成前のニードルブランケットの嵩密度は、通常0.20g/cm3を超えて0.45g/cm3以下である請求項1に記載の無機繊維成形体。
- 一般式における原子比(y/x)が2~26である請求項1又は2に記載の無機繊維成形体。
- 無機繊維のニードルブランケットの嵩密度が0.10g/cm3以上である特徴とする請求項1~3の何れかに記載の無機繊維成形体。
- 無機繊維の平均繊維径が5~7μmであり、実質的に繊維径3μm以下の繊維を含まない請求項1~4の何れかに記載の無機繊維成形体。
- 無機繊維のニードルブランケットにおけるニードル密度がニードリング処理面の任意の1cm2あたり2~200打である請求項1~5の何れかに記載の無機繊維成形体。
- 無機繊維がアルミナ65~98質量%とシリカ2~35質量%とを含む多結晶質アルミナ/シリカ系繊維である請求項1~6の何れかに記載の無機繊維成形体。
- ニードルブランケットに対する前駆体の液状物質の含浸量がニードルブランケットの無機繊維100質量部に対するスピネル系化合物の前駆体の質量部換算として10~100質量部である請求項1~7の何れかに記載の無機繊維成形体。
- ニードルブランケットの面密度が1000~4000g/m2である請求項1~8の何れかに記載の無機繊維成形体。
- 請求項1~9の何れかに記載の無機繊維成形体よりなる断熱材。
- バーナータイルである請求項10に記載の断熱材。
- スキッドパイプ用である請求項10に記載の断熱材。
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020147004255A KR101961628B1 (ko) | 2011-09-08 | 2012-08-31 | 무기섬유 성형체 |
| JP2013526261A JP5376097B2 (ja) | 2011-09-08 | 2012-08-31 | 無機繊維成形体 |
| US14/342,627 US20140272363A1 (en) | 2011-09-08 | 2012-08-31 | Inorganic fiber molded body |
| EP12830670.1A EP2754747B1 (en) | 2011-09-08 | 2012-08-31 | Molded inorganic-fiber object |
| CN201280043101.6A CN103781964B (zh) | 2011-09-08 | 2012-08-31 | 无机纤维成型体 |
| US14/754,973 US20150299938A1 (en) | 2011-09-08 | 2015-06-30 | Method of producing inorganic fiber molded body |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011-195550 | 2011-09-08 | ||
| JP2011195550 | 2011-09-08 |
Related Child Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US14/342,627 A-371-Of-International US20140272363A1 (en) | 2011-09-08 | 2012-08-31 | Inorganic fiber molded body |
| US14/754,973 Continuation US20150299938A1 (en) | 2011-09-08 | 2015-06-30 | Method of producing inorganic fiber molded body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2013035646A1 true WO2013035646A1 (ja) | 2013-03-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2012/072227 Ceased WO2013035646A1 (ja) | 2011-09-08 | 2012-08-31 | 無機繊維成形体 |
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| Country | Link |
|---|---|
| US (2) | US20140272363A1 (ja) |
| EP (1) | EP2754747B1 (ja) |
| JP (1) | JP5376097B2 (ja) |
| KR (1) | KR101961628B1 (ja) |
| CN (1) | CN103781964B (ja) |
| WO (1) | WO2013035646A1 (ja) |
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| JP2015081753A (ja) * | 2013-10-24 | 2015-04-27 | 新日鐵住金株式会社 | 無機繊維耐火断熱ライニング施工方法及び炉 |
| JP2016030715A (ja) * | 2014-07-30 | 2016-03-07 | クアーズテック株式会社 | 複合断熱材 |
| JP2021017965A (ja) * | 2019-07-23 | 2021-02-15 | イビデン株式会社 | 管体支持用緩衝材、構造物及び管体固定方法 |
| JP2023508112A (ja) * | 2019-12-30 | 2023-02-28 | スリーエム イノベイティブ プロパティズ カンパニー | 多結晶性アルミノシリケートセラミックフィラメント不織マット、及びその製造方法 |
| JP2025010614A (ja) * | 2022-10-14 | 2025-01-22 | ジカンテクノ株式会社 | シリカの製造方法 |
| CN119797904A (zh) * | 2024-12-27 | 2025-04-11 | 湖北师范大学 | 一种高性能氧化铝纤维增强陶瓷基复合材料的制备方法 |
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| EP3106752B1 (en) * | 2014-02-12 | 2020-01-08 | Mitsubishi Chemical Corporation | Burner tile, burner, and furnace |
| CN107003070B (zh) * | 2014-11-14 | 2019-03-12 | 三菱化学株式会社 | 滑道柱用绝热保护部件及滑道柱用绝热保护部件的施工方法 |
| JP6824601B2 (ja) * | 2015-06-29 | 2021-02-03 | クアーズテック株式会社 | 強化用繊維材料及びその製造方法、並びに繊維強化セラミックス複合材料 |
| CN109963973A (zh) * | 2016-11-18 | 2019-07-02 | 3M创新有限公司 | 非吸入的多晶铝硅酸盐陶瓷单纤维、纤维和非织造垫及其制造和使用方法 |
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| KR102088034B1 (ko) * | 2019-05-14 | 2020-03-11 | 장근수 | 내열성이 강화된 버너 타일 |
| CN111039690B (zh) * | 2019-12-26 | 2022-04-15 | 山东鲁阳浩特高技术纤维有限公司 | 一种氧化铝纤维复合模块及其制备方法 |
| JP6997263B1 (ja) * | 2020-07-10 | 2022-01-17 | イビデン株式会社 | 熱伝達抑制シート及び組電池 |
| CN112501783A (zh) * | 2020-12-16 | 2021-03-16 | 山东鲁阳节能材料股份有限公司 | 一种低容重无机纤维针刺毯的制备方法 |
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| JP2016030715A (ja) * | 2014-07-30 | 2016-03-07 | クアーズテック株式会社 | 複合断熱材 |
| JP2021017965A (ja) * | 2019-07-23 | 2021-02-15 | イビデン株式会社 | 管体支持用緩衝材、構造物及び管体固定方法 |
| JP7430042B2 (ja) | 2019-07-23 | 2024-02-09 | イビデン株式会社 | 管体支持用緩衝材、構造物及び管体固定方法 |
| JP2023508112A (ja) * | 2019-12-30 | 2023-02-28 | スリーエム イノベイティブ プロパティズ カンパニー | 多結晶性アルミノシリケートセラミックフィラメント不織マット、及びその製造方法 |
| JP7592094B2 (ja) | 2019-12-30 | 2024-11-29 | スリーエム イノベイティブ プロパティズ カンパニー | 多結晶性アルミノシリケートセラミックフィラメント不織マット、及びその製造方法 |
| JP2025010614A (ja) * | 2022-10-14 | 2025-01-22 | ジカンテクノ株式会社 | シリカの製造方法 |
| JP7785273B2 (ja) | 2022-10-14 | 2025-12-15 | ジカンテクノ株式会社 | シリカの製造方法 |
| CN119797904A (zh) * | 2024-12-27 | 2025-04-11 | 湖北师范大学 | 一种高性能氧化铝纤维增强陶瓷基复合材料的制备方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20140058568A (ko) | 2014-05-14 |
| CN103781964A (zh) | 2014-05-07 |
| CN103781964B (zh) | 2015-12-23 |
| EP2754747A1 (en) | 2014-07-16 |
| EP2754747B1 (en) | 2017-08-02 |
| KR101961628B1 (ko) | 2019-03-26 |
| JPWO2013035646A1 (ja) | 2015-03-23 |
| US20140272363A1 (en) | 2014-09-18 |
| US20150299938A1 (en) | 2015-10-22 |
| EP2754747A4 (en) | 2015-04-22 |
| JP5376097B2 (ja) | 2013-12-25 |
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