CN110128159A - A kind of preparation method of rare earth oxide Al-base ceramic core - Google Patents
A kind of preparation method of rare earth oxide Al-base ceramic core Download PDFInfo
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- CN110128159A CN110128159A CN201910473577.7A CN201910473577A CN110128159A CN 110128159 A CN110128159 A CN 110128159A CN 201910473577 A CN201910473577 A CN 201910473577A CN 110128159 A CN110128159 A CN 110128159A
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- 239000000919 ceramic Substances 0.000 title claims abstract description 87
- 238000002360 preparation method Methods 0.000 title claims abstract description 30
- 229910001404 rare earth metal oxide Inorganic materials 0.000 title claims abstract description 24
- 239000011162 core material Substances 0.000 claims abstract description 80
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 48
- 239000004014 plasticizer Substances 0.000 claims abstract description 32
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 28
- MRELNEQAGSRDBK-UHFFFAOYSA-N lanthanum(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[La+3].[La+3] MRELNEQAGSRDBK-UHFFFAOYSA-N 0.000 claims abstract description 26
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000000203 mixture Substances 0.000 claims abstract description 19
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 18
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 14
- 239000000835 fiber Substances 0.000 claims abstract description 12
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims description 30
- 238000003756 stirring Methods 0.000 claims description 25
- 238000000034 method Methods 0.000 claims description 23
- 230000008569 process Effects 0.000 claims description 20
- 239000000243 solution Substances 0.000 claims description 15
- 239000000843 powder Substances 0.000 claims description 11
- 239000003292 glue Substances 0.000 claims description 10
- 238000005245 sintering Methods 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 8
- 239000004411 aluminium Substances 0.000 claims description 7
- 229910052782 aluminium Inorganic materials 0.000 claims description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 7
- 238000004321 preservation Methods 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 6
- 238000010304 firing Methods 0.000 claims description 6
- 238000001746 injection moulding Methods 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
- 239000011261 inert gas Substances 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- 230000004520 agglutination Effects 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 3
- 239000000126 substance Substances 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 229910052761 rare earth metal Inorganic materials 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 229910052746 lanthanum Inorganic materials 0.000 description 3
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 235000012241 calcium silicate Nutrition 0.000 description 1
- 125000003636 chemical group Chemical group 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000005495 investment casting Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011224 oxide ceramic Substances 0.000 description 1
- 229910052574 oxide ceramic Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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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
- C04B35/01—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
- C04B35/10—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 aluminium oxide
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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
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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
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/632—Organic additives
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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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- 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
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
- C04B2235/3206—Magnesium oxides or oxide-forming salts thereof
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- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3224—Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
- C04B2235/3227—Lanthanum oxide or oxide-forming salts thereof
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- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
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- Compositions Of Oxide Ceramics (AREA)
Abstract
A kind of preparation method of rare earth oxide Al-base ceramic core of the invention, belong to ceramic core manufacturing technology field, the chemical composition percentage of Al-base ceramic core material are as follows: 8%~10% ceramic fibre, 3%~5% silicate hydrolyzate liquid, 8%~10% silica solution, 60%~70% aluminium oxide, 1%~2% magnesia, 1%~2% lanthana and 10%~12% plasticizer, Al-base ceramic core intensity of the invention is high, and inoxidizability is strong.
Description
Technical field
The invention belongs to ceramic core manufacturing fields, systems a kind of system of rare earth oxide Al-base ceramic core
Preparation Method.
Background technique
Oxide ceramics is various in style, and purposes is extremely wide, can be used as structural material, functional material and advanced fire proofed wood
Material is used for many fields such as electronics, information, laser, infrared, computer, aerospace, atomic energy, chemical industry, metallurgy.
Currently, studying relatively broad aluminium oxide, oxidation silicon-base ceramic core, molten titanium is closed because core material does not have
The good chemical reaction inertia of gold and core leach technics complexity is difficult to apply to titanium alloy fine casting field, and rare earth element is at high temperature
With good reactionlessness, therefore a small amount of rare earth oxide is added i.e. in ceramic core, the high temperature and creep resistance of ceramic core can be improved
Performance.
Through retrieving, the title of innovation and creation are as follows: a kind of rare earth coated aluminum oxide base ceramic core (application number:
201410224781.2 data of publication of application: 2014.10.01).This application discloses a kind of ceramics for being added to rare earth element
Core has certain advantage in casting field using ceramic core prepared by the program, but the preparation method that the program is announced is inadequate
Good, the intensity of ceramic core of preparation itself is low, and performance does not have the requirement in hot investment casting field, is easy to happen when in use crisp
Disconnected, using effect is poor.
Summary of the invention
1. technical problems to be solved by the inivention
It is an object of the invention to solve the defect that existing ceramic core intensity is not high, inoxidizability is poor, provide a kind of dilute
The preparation method of native oxide Al-base ceramic core, the ceramic core prepared using this method, intensity is high, and inoxidizability is strong.
2. technical solution
In order to achieve the above objectives, technical solution provided by the invention are as follows:
A kind of preparation method of rare earth oxide Al-base ceramic core of the invention, the chemical composition hundred of Al-base ceramic core material
Divide ratio are as follows: 8%~10% ceramic fibre, 3%~5% silicate hydrolyzate liquid, 8%~10% silica solution, 60%~70% oxygen
Change aluminium, 1%~2% magnesia, 1%~2% lanthana and 10%~12% plasticizer.
Preferably, aluminium oxide, magnesia and lanthana are nanometer grade powder.
Preferably, preparation method is to mix the material of ceramic core in proportion, heat, stirring to get mixture, into
One step forms by a firing mixture injection molding high temperature.
Preferably, preparation method includes the following steps:
S100, mixing, by above-mentioned ceramic fibre, silica solution, aluminium oxide, magnesia, lanthana by the proportion into
Row is mixed to get mixture；
S200, heating, heat mixture, and further stir to get ceramic powder；
S300, plasticising in the plasticizer to ceramic powder for adding the component, continue stirring and are no less than 15h that initial material is made；
S400, it glues by force, adds in a small amount of silicate hydrolyzate liquid to initial material, stir agglutination material；
Glue material is slowly injected into mold and rejects mixed air by S500, injection molding；
S600, pre-burning carry out heating pre-burning to the gluey material in mold using low temperature；
S700, it burns eventually, the first type core material after pre-burning carries out high temperature sintering, heat preservation and cooling and shaping.
Preferably, the detailed process of step S300 plasticising is that the addition of plasticizer is added using discontinuous, and every addition 1% is left
Right plasticizer is just quickly stirred 15min, continues to add same amount of plasticizer after being stirred and be stirred, until
It adds the desired amount of plasticizer and at the uniform velocity stirring is no less than 15h.
Preferably, the silicate hydrolyzate liquid that step S400 glues that by force detailed process is addition is added to from the edge of container
Enter, the process of stirring is stirred from edge coils to centre.
Preferably, the detailed process of step S600 pre-burning is to carry out 600 °~800 ° under the protection of inert gas to add every mould
Heat forms by a firing.
Preferably, the detailed process that step S700 is burnt eventually be by the first type core material after pre-burning be rapidly heated to 1350 °~
1400 ° of progress high temperature sintering processing, carry out the no less than heat preservation of 5h after sintering, last natural cooling obtains rare earth oxide aluminium base
Ceramic core.
3. beneficial effect
Using technical solution provided by the invention, compared with prior art, have the following beneficial effects:
(1) preparation method of a kind of rare earth oxide Al-base ceramic core of the invention, the chemical group of Al-base ceramic core material
At percentage are as follows: 8%~10% ceramic fibre, 3%~5% silicate hydrolyzate liquid, 8%~10% silica solution, 60%~
70% aluminium oxide, 1%~2% magnesia, 1%~2% lanthana and 10%~12% plasticizer, ceramic core of the invention
Using aluminium oxide as substrate, solution pervasion is finally cooled into oxidation inside ceramic core and surface to aluminium oxide at high temperature
Aluminium film has very high inoxidizability, so that the inoxidizability of ceramic core entirety improves, while wherein containing lanthana, improves
The high temperature resistance of ceramic core.
(2) preparation method of a kind of rare earth oxide Al-base ceramic core of the invention, the detailed process of step S300 plasticising
It is added for the addition of plasticizer using discontinuous, the plasticizer of every addition 1% or so is just quickly stirred 15min, and stirring is mixed
Continue to add same amount of plasticizer after conjunction and be stirred, is no less than until adding the desired amount of plasticizer and at the uniform velocity stirring
The process of 15h, this plasticising are slow and uniform, and plasticizer can be merged with material completely, so that the plasticity of entire ceramic core is high.
(3) preparation method of a kind of rare earth oxide Al-base ceramic core of the invention, step S400 glue by force detailed process and are
The silicate hydrolyzate liquid of addition is added from the edge of container to be entered, and the process of stirring is stirred from edge coils to centre, this is strong
Viscous process is slowly fade-in inside from outside, so that viscosity has gradient procedure, external viscosity is high, internal slightly lower, ensure that pottery
The integrality of porcelain core is simultaneously but also the particle arrangement on surface is close, so that surface is more smooth.
Specific embodiment
To facilitate the understanding of the present invention, below with reference to several embodiments, still, the present invention can be with many different shapes
Formula is realized, however it is not limited to embodiment described herein, on the contrary, purpose of providing these embodiments is makes to of the invention
Disclosure is more thorough and comprehensive.
It should be noted that it can directly on the other element when element is referred to as " being fixedly arranged on " another element
Or there may also be elements placed in the middle；When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements；Term as used herein " vertical ", " horizontal ", " left side ",
" right side " and similar statement are for illustrative purposes only.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical；Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention；Term " and or " used herein includes one or more phases
Any and all combinations of the listed item of pass.
A kind of preparation method of rare earth oxide Al-base ceramic core, the chemical composition percentage of Al-base ceramic core material are as follows:
8%~10% ceramic fibre, 3%~5% silicate hydrolyzate liquid, 8%~10% silica solution, 60%~70% aluminium oxide, 1%
~2% magnesia, 1%~2% lanthana and 10%~12% plasticizer, this Al-base ceramic core material composition in include
Lanthana rare earth element the electric conductivity and high temperature resistance of ceramic core can be improved, while a large amount of aluminium oxide is as substrate
The oxidation resistance that aluminum oxide film improves ceramic core is formed in core surface, plasticizer improves the plasticity energy of ceramic core
Power, so that each material sufficiently merges, the viscosity of silicate hydrolyzate liquid improves the integral strength of ceramic core, while its fire resisting
Property ceramic core is not burnt at high temperature, under silica solution and ceramic fibre high temperature occur reactive infiltration to inside formed calcium silicates
Improve the intensity inside ceramic core.
Above-mentioned aluminium oxide, magnesia and lanthana is nanometer grade powder, is made using nanometer grade powder in subsequent system
Standby is that can merge well and react with other materials, while the smaller density for improving ceramic core in gap between nanometer grade powder
Increase intensity, surface is more smooth.
Preparation method is to mix the material of ceramic core in proportion, heat, stirring to get mixture, will further be mixed
It closes object injection molding high temperature to form by a firing, the activity that preliminary heating improves molecule is carried out in mixing, accelerates fusion, so that material
Mixing it is even closer, the ceramic core of subsequent preparation is more complete, and overall performance is consistent.
Above-mentioned preparation method includes the following steps:
S100, mixing, by above-mentioned ceramic fibre, silica solution, aluminium oxide, magnesia, lanthana by the proportion into
Row is mixed to get mixture；
S200, heating, heat mixture, and further stir to get ceramic powder；
S300, plasticising in the plasticizer to ceramic powder for adding the component, continue stirring and are no less than 15h that initial material is made；
S400, it glues by force, adds in a small amount of silicate hydrolyzate liquid to initial material, stir agglutination material；
Glue material is slowly injected into mold and rejects mixed air by S500, injection molding；
S600, pre-burning carry out heating pre-burning to the gluey material in mold using low temperature；
S700, it burns eventually, the first type core material after pre-burning carries out high temperature sintering, heat preservation and cooling and shaping.
The detailed process of above-mentioned step S300 plasticising is that the addition of plasticizer is added using discontinuous, and every addition 1% is left
Right plasticizer is just quickly stirred 15min, continues to add same amount of plasticizer after being stirred and be stirred, until
It adds the desired amount of plasticizer and at the uniform velocity stirring is no less than 15h, if if disposable whole plasticizer is stirred again, add
The local plasticity entered is high, and from being added, the farther away local plasticity in area is poor, while stirring can not make plasticizer and remaining material
Fusion completely, overall effect is bad, and measures repeatedly several addition and stirring less using discontinuous, that is, may make plasticizer and its
Remaining material is preferably merged and is reacted, and whole plasticity is guaranteed.
Above-mentioned step S400, which glues by force the silicate hydrolyzate liquid that detailed process is addition and adds from the edge of container, to be entered,
The process of stirring is stirred from edge coils to centre, if silicate hydrolyzate liquid is added from centre, the viscosity ladder of the ceramic core
Degree is internal strong external weak, and the intensity of ceramic core entirety is low, is easy face checking when high temperature is fired, also easy brittle failure when use,
And say that silicate hydrolyzate liquid is added from edge and stirs to centre, adhesive strength outside is high internal weak, and core surface is not easy
Cracking, whole also not easy to break, using effect is good.
The detailed process of above-mentioned step S600 pre-burning is to carry out 600 °~800 ° under the protection of inert gas to add every mould
Heat forms by a firing, and the purpose of pre-burning is so that ceramic core is integrally formed, and intensity improves, and using inert gas shielding, avoids aluminium base
The reaction of oxide, while but also moisture is evaporated.
The detailed process that above-mentioned step S700 is burnt eventually be by the first type core material after pre-burning be rapidly heated to 1350 °~
1400 ° of progress high temperature sintering processing, carry out the no less than heat preservation of 5h after sintering, last natural cooling obtains rare earth oxide aluminium base
Ceramic core, this step can make aluminium base oxide, and core surface forms film and carries out inoxidizability protection again, and 1350 °~
1400 ° temperature range control avoid temperature it is excessively high so that ceramic core brittleness increase, after sintering heat preservation so that inside ceramic core
Also it is able to maintain hot environment reaction, whole performance improves.
Embodiment 1
A kind of preparation method of rare earth oxide Al-base ceramic core of this embodiment, the chemical composition of Al-base ceramic core material
Percentage are as follows: 10% ceramic fibre, 5% silicate hydrolyzate liquid, 10% silica solution, 60% aluminium oxide, 1% magnesia, 2% oxygen
Change lanthanum and 12% plasticizer.
The compression strength of the ceramic core obtained after using the material of aforementioned proportion to be prepared is measured as 900Mpa, bending resistance
Intensity is 300MPa.
Embodiment 2
A kind of preparation method of rare earth oxide Al-base ceramic core of this embodiment, the chemical composition of Al-base ceramic core material
Percentage are as follows: 8% ceramic fibre, 4% silicate hydrolyzate liquid, 10% silica solution, 66% aluminium oxide, 1% magnesia, 1% oxygen
Change lanthanum and 10% plasticizer.
The compression strength of the ceramic core obtained after using the material of aforementioned proportion to be prepared is measured as 930Mpa, bending resistance
Intensity is 310MPa.
Embodiment 3
A kind of preparation method of rare earth oxide Al-base ceramic core of this embodiment, the chemical composition of Al-base ceramic core material
Percentage are as follows: 9% ceramic fibre, 3% silicate hydrolyzate liquid, 8% silica solution, 70% aluminium oxide, 1% magnesia, 1% oxidation
Lanthanum and 8% plasticizer.
The compression strength of the ceramic core obtained after using the material of aforementioned proportion to be prepared is measured as 1000Mpa, is resisted
Curved intensity is 330MPa.
Certain embodiment of the invention above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
Limitations on the scope of the patent of the present invention therefore cannot be interpreted as；It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention
Protect range；Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (8)
1. a kind of preparation method of rare earth oxide Al-base ceramic core, it is characterised in that: the chemistry of the Al-base ceramic core material
Percentage composition are as follows: 8%~10% ceramic fibre, 3%~5% silicate hydrolyzate liquid, 8%~10% silica solution, 60%~
70% aluminium oxide, 1%~2% magnesia, 1%~2% lanthana and 10%~12% plasticizer.
2. a kind of preparation method of rare earth oxide Al-base ceramic core according to claim 1, it is characterised in that: the oxygen
Changing aluminium, magnesia and lanthana is nanometer grade powder.
3. a kind of preparation method of rare earth oxide Al-base ceramic core according to claim 1, it is characterised in that: the system
Preparation Method is to mix the material of ceramic core in proportion, heat, stirring to get mixture, further that mixture injection molding is high
Temperature forms by a firing.
4. a kind of preparation method of rare earth oxide Al-base ceramic core according to claim 1, which is characterized in that the system
Preparation Method includes the following steps:
S100, mixing are mixed above-mentioned ceramic fibre, silica solution, aluminium oxide, magnesia, lanthana by the proportion
Conjunction obtains mixture；
S200, heating, heat mixture, and further stir to get ceramic powder；
S300, plasticising in the plasticizer to ceramic powder for adding the component, continue stirring and are no less than 15h that initial material is made；
S400, it glues by force, adds in a small amount of silicate hydrolyzate liquid to initial material, stir agglutination material；
Glue material is slowly injected into mold and rejects mixed air by S500, injection molding；
S600, pre-burning carry out heating pre-burning to the gluey material in mold using low temperature；
S700, it burns eventually, the first type core material after pre-burning carries out high temperature sintering, heat preservation and cooling and shaping.
5. a kind of preparation method of rare earth oxide Al-base ceramic core according to claim 4, is characterized in that: the step
The detailed process of S300 plasticising is that the addition of plasticizer is added using discontinuous, and the plasticizer of every addition 1% or so just quickly stirs
Mixing 15min is mixed, continues to add same amount of plasticizer after being stirred and be stirred, until adding the desired amount of plasticizer
And at the uniform velocity stirring is no less than 15h.
6. a kind of preparation method of rare earth oxide Al-base ceramic core according to claim 4, is characterized in that: the step
S400 glues by force silicate hydrolyzate liquid that detailed process be addition from the addition entrance of the edge of container, and the process of stirring is from edge spiral shell
Rotation is stirred to centre.
7. a kind of preparation method of rare earth oxide Al-base ceramic core according to claim 4, is characterized in that: the step
The detailed process of S600 pre-burning is to carry out 600 °~800 ° under the protection of inert gas to form by a firing every mould heating.
8. a kind of preparation method of rare earth oxide Al-base ceramic core according to claim 4, is characterized in that: the step
The detailed process that S700 is burnt eventually is that the first type core material after pre-burning is rapidly heated to 1350 °~1400 ° progress high temperature sintering processing,
The no less than heat preservation of 5h is carried out after sintering, last natural cooling obtains rare earth oxide Al-base ceramic core.
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