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WO2014157527A1 - Composition similaire à de l'argile pour pièce frittée en métal noble - Google Patents

Composition similaire à de l'argile pour pièce frittée en métal noble Download PDF

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Publication number
WO2014157527A1
WO2014157527A1 PCT/JP2014/058880 JP2014058880W WO2014157527A1 WO 2014157527 A1 WO2014157527 A1 WO 2014157527A1 JP 2014058880 W JP2014058880 W JP 2014058880W WO 2014157527 A1 WO2014157527 A1 WO 2014157527A1
Authority
WO
WIPO (PCT)
Prior art keywords
clay
composition
noble metal
mass
powder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2014/058880
Other languages
English (en)
Japanese (ja)
Inventor
佳史 山本
井戸　康夫
司 池田
真二 大谷
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Materials Corp
Original Assignee
Mitsubishi Materials Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Materials Corp filed Critical Mitsubishi Materials Corp
Priority to EP14774733.1A priority Critical patent/EP2979782B1/fr
Priority to US14/768,305 priority patent/US20160001363A1/en
Publication of WO2014157527A1 publication Critical patent/WO2014157527A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/04—Making non-ferrous alloys by powder metallurgy
    • C22C1/0466—Alloys based on noble metals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
    • B22F1/107—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material containing organic material comprising solvents, e.g. for slip casting

Definitions

  • the present invention relates to a clay-like composition for forming a precious metal sintered body.
  • precious metal jewelry and arts and crafts such as rings are generally manufactured by casting or forging a precious metal-containing material such as silver or gold.
  • precious metal clay containing a precious metal powder such as silver or gold (clay-like composition for forming a sintered body) is commercially available, and by firing the precious metal clay into an arbitrary shape, Methods have been proposed for producing precious metal jewelry and arts and crafts having an arbitrary shape (see, for example, Patent Documents 1 to 3).
  • modeling can be performed freely using precious metal clay in the same manner as normal clay work.
  • after drying the molded body obtained by shaping the precious metal clay it is possible to manufacture precious metal jewelry and arts and crafts very easily by firing using a heating furnace. .
  • modeling is performed using the silver clay using the silver powder of pure Ag, for example.
  • Such modeling is mainly performed manually, but when time elapses, the clay dries and it may be difficult to perform a process such as bending.
  • the shape of the precious metal sintered body is complicated due to diversification in design and preference, and the time required for the shaping tends to be long.
  • the conventional product is cracked on the surface, and further bent when bent. Therefore, when making a ring or the like, it is necessary to perform modeling in a limited time, and the design is limited.
  • the present invention has been completed as a result of intensive research for the following purposes.
  • the present invention is a precious metal ware that has excellent flexibility and bending workability even during the precious metal clay shaping process, even after the precious metal clay has dried, and as a result, the shaping time such as bending can be increased.
  • An object is to provide a clay-like composition for forming a knot.
  • the clay-like composition for forming a noble metal sintered body of the present invention (hereinafter referred to as “noble metal clay”) is, for example, a powder containing gold or silver or a silver alloy as a noble metal, at least an organic binder such as methylcellulose, It is obtained by adding water and adding at least a predetermined amount of propylene glycol as an additive component.
  • the propylene glycol described above is widely used as a solvent, and is added to a solution to adjust the viscosity, or added to foods and cosmetics to provide water retention.
  • the present inventors have determined the type and amount of additives to be added to the clay-like composition for forming a noble metal sintered body and the characteristics of the clay-like composition after drying by shaping. Evaluation was performed from the viewpoint of flexibility, bending workability, and formability. As a result of continuing intensive studies based on the evaluation results, the present inventors have come up with the following present invention.
  • a clay-like composition for forming a precious metal sintered body containing at least a precious metal powder and / or a precious metal alloy powder, an organic binder, an organic additive, and water, A clay-like composition for forming a precious metal sintered body, wherein the organic additive is propylene glycol of 0.1 to 3.0% by mass.
  • the clay-like composition for forming a noble metal sintered body according to (1) which further contains glycerin as the organic additive.
  • the clay-like composition for forming a noble metal sintered body of the present invention containing at least a noble metal powder and / or a noble metal alloy powder, an organic binder, an organic additive and water. Since the organic additive is 0.1 to 3.0% by mass of propylene glycol, excellent flexibility and bending workability can be obtained even after the noble metal clay is dried during the molding. As a result, it is possible to provide a clay-like composition for forming a noble metal sintered body with less time constraints during processing such as bending.
  • Sectional photograph of the noble metal clay which concerns on this invention example 3 which was able to shape
  • the clay-like composition according to this embodiment contains at least a noble metal powder and / or a noble metal alloy powder, an organic binder, an organic additive and water, and particularly 0.1 to 3.0% by mass of propylene as an organic additive. It contains glycol. Furthermore, it is desirable to contain glycerin or polyethylene glycol as the organic additive.
  • a surfactant, fats and oils, and olive oil may be added as necessary.
  • A) Noble metal powder, noble metal alloy powder As the noble metal powder and the noble metal alloy powder used in the present embodiment, gold powder, silver powder, copper powder, platinum powder, and alloy powders thereof can be used. A mixed powder of silver powder and copper powder can also be used. As the silver alloy powder, a silver-copper alloy is preferably used. These noble metal powders and / or noble metal alloy powders are the main components constituting a clay-like composition for forming a noble metal sintered body. The content is not a dominant condition in achieving the effect in the present embodiment, but the content is 50% by mass or more and 95% by mass in constituting a more practical clay-like composition.
  • the following is preferable. That is, when the content is less than 50% by mass, the texture and gloss of the noble metal are not obtained. On the other hand, when the content exceeds 95% by mass, the elongation and strength of the clay-like composition are lowered, which is not preferable.
  • the content of the noble metal powder and the noble metal alloy powder is more preferably 75 to 93% by mass.
  • (B) Organic Binder As the organic binder used in the present embodiment, at least one or two of a cellulose binder, a polyvinyl binder, an acrylic binder, a wax binder, a resin binder, starch, gelatin, and wheat flour are used. You may comprise by the above combination. Of the above, it is most preferable to use a cellulose-based binder, particularly water-soluble cellulose such as methylcellulose.
  • the content of the organic binder in the clay-like composition is not particularly limited, but is considered to be 5 to 50% by mass, and more preferably 7 to 25% by mass.
  • glycerin and polyethylene glycol When glycerin and polyethylene glycol are added, it is desirable to adjust the total content of propylene glycol, glycerin and polyethylene glycol to be 0.1 to 3.0% by mass.
  • Glycerin and polyethylene glycol are liquid substances having both hydrophilic and lipophilic properties, and are known to give viscosity when contained in a clay-like composition.
  • propylene glycol is added alone to the clay-like composition
  • the effect that the flexibility is not easily lowered even when the clay-like composition is dried is obtained when propylene glycol is added alone.
  • glycerin and / or polyethylene glycol is added based on the novel finding that the present inventors have found that the increase is greater.
  • the content of the organic additive in the clay-like composition is more preferably 0.5 to 2.0% by mass.
  • the clay-like composition for forming a noble metal sintered body according to this embodiment may further contain at least one of fats and oils, olive oil, and a surfactant as necessary.
  • the content of fats and oils in the clay-like composition is not particularly limited, but is considered to be 0.01 to 0.08% by mass, and more preferably 0.03 to 0.06% by mass.
  • the content of olive oil in the clay-like composition is not particularly limited, but is considered to be 0.001 to 0.05% by mass, and more preferably 0.01 to 0.03% by mass.
  • the content of the surfactant in the clay-like composition is not particularly limited, but is considered to be 0.001 to 0.05% by mass, and more preferably 0.01 to 0.03% by mass.
  • fats and oils examples include organic acids (oleic acid, stearic acid, phthalic acid, palmitic acid, sepacic acid, acetylcitric acid, hydroxybenzoic acid, lauric acid, myristic acid, caproic acid, enanthic acid, butyric acid, capric acid).
  • organic acids oleic acid, stearic acid, phthalic acid, palmitic acid, sepacic acid, acetylcitric acid, hydroxybenzoic acid, lauric acid, myristic acid, caproic acid, enanthic acid, butyric acid, capric acid).
  • Organic acid esters organic acid esters having methyl, ethyl, propyl, butyl, octyl, hexyl, dimethyl, diethyl, isopropyl, and isobutyl groups
  • higher alcohols octanol, nonanol, decanol
  • polyhydric alcohols glycerin, arabit, sorbitan
  • ethers dioctyl ether, didecyl ether
  • the surfactant is added to and mixed with the clay-like composition, thereby pulverizing a solid material generated by the reaction between the binder and water and improving the mixing property between the noble metal powder and the binder.
  • the kind of surfactant is not specifically limited, A normal surfactant can be used.
  • Surfactant is a generic term for substances that have water-friendly parts (hydrophilic groups) and oil-friendly parts (lipophilic groups / hydrophobic groups) in the molecule.
  • Polyethylene glycol in the embodiment is also included in the surfactant.
  • the surfactant referred to here is one excluding polyethylene glycol added in anticipation of the action specific to the present embodiment, and dispersion / aggregation action, foaming / defoaming action, wettability improvement, Examples thereof include sodium lauryl sulfate and polyoxyethylene alkyl ether which are added in a predetermined amount for a softness / smoothing action, an antistatic action and the like.
  • the precious metal sintered body can be manufactured by kneading the above-mentioned clay-like composition for forming a precious metal sintered body, forming the precious metal sintered body into a predetermined shape, and then firing it.
  • methyl cellulose, surfactant, olive oil, propylene glycol, glycerin, polyethylene glycol and water as an organic binder are stirred and mixed in a stirring vessel.
  • This binder mixed solution is introduced into the kneading apparatus together with the noble metal powder and / or the noble metal alloy powder.
  • propylene glycol, glycerin and polyethylene glycol are added during the stirring and mixing of the binder mixed solution, but the organic binder, the noble metal powder and / or the noble metal alloy powder and water are added during the kneading in the kneading apparatus. You can also.
  • the stainless steel kneading container of the kneading apparatus is a container whose inner wall is coated with CrN. Since the CrN coating is excellent in wear resistance and lubricity, it is possible to suppress mixing of Fe.
  • methyl cellulose, surfactant, olive oil, propylene glycol, glycerin, polyethylene glycol and water as an organic binder were stirred and mixed in a stirring vessel to obtain a binder mixed solution.
  • this binder mixed solution was introduced together with silver powder into a stainless steel kneading apparatus having an inner wall coated with CrN.
  • a clay-like composition having the composition shown in Table 1 was prepared by kneading silver powder, a binder mixed solution and water.
  • the noble metal powder may be any other noble metal powder used in a clay-like composition for forming a noble metal sintered body, such as a gold powder and a silver alloy powder.
  • FIG. 1 shows a photograph of the precious metal clay of Example 3 of the present invention which was formed into a plate shape having a thickness of 3 mm as a whole.
  • FIG. 2 The photograph of the noble metal clay of the comparative example 2 which could not be shape
  • a noble metal sintered compact can be manufactured by knead

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  • Powder Metallurgy (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)

Abstract

La présente invention concerne une composition similaire à de l'argile permettant de former une pièce frittée en métal noble comprenant au moins une poudre de métal noble et/ou une poudre d'alliage de métal noble, un liant organique, un additif organique et de l'eau. L'additif organique est composé de 0,1 à 3,0 % en masse de propylène glycol. La composition similaire à de l'argile présente une excellente aptitude au cintrage, même après avoir été séchée pendant le moulage, et par conséquent, il y a peu de contraintes de temps lorsque la composition est travaillée par cintrage, et similaire(s).
PCT/JP2014/058880 2013-03-28 2014-03-27 Composition similaire à de l'argile pour pièce frittée en métal noble Ceased WO2014157527A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP14774733.1A EP2979782B1 (fr) 2013-03-28 2014-03-27 Composition similaire à de l'argile pour pièce frittée en métal noble
US14/768,305 US20160001363A1 (en) 2013-03-28 2014-03-27 Clay-like composition for sintered precious metal body

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2013069638A JP6090664B2 (ja) 2013-03-28 2013-03-28 貴金属焼結体用の粘土状組成物
JP2013-069638 2013-03-28

Publications (1)

Publication Number Publication Date
WO2014157527A1 true WO2014157527A1 (fr) 2014-10-02

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PCT/JP2014/058880 Ceased WO2014157527A1 (fr) 2013-03-28 2014-03-27 Composition similaire à de l'argile pour pièce frittée en métal noble

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US (1) US20160001363A1 (fr)
EP (1) EP2979782B1 (fr)
JP (1) JP6090664B2 (fr)
WO (1) WO2014157527A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015080128A1 (fr) * 2013-11-28 2015-06-04 三菱マテリアル株式会社 Composition argileuse pour comprimé fritté de métal noble
WO2015080181A1 (fr) * 2013-11-28 2015-06-04 三菱マテリアル株式会社 Corps moulé de type en argile permettant de former un compact fritté en un métal noble

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018097372A1 (fr) * 2016-11-28 2018-05-31 마경희 Composition de pâte d'argent et procédé pour la fabriquer

Citations (7)

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JPH0426707A (ja) 1990-05-18 1992-01-29 Mitsubishi Materials Corp 貴金属造形用可塑性組成物
JPH0497940A (ja) * 1990-08-14 1992-03-30 Dow Chem Co:The 無機粉末スラリーの製造方法
JP2003521580A (ja) * 1999-07-15 2003-07-15 アライドシグナル インコーポレイテッド 水性射出成形フィードストックの連続コンパウンディング
JP2005187858A (ja) 2003-12-25 2005-07-14 Mitsubishi Materials Corp 銀粘土焼成体表面装飾用ペースト
JP2008135416A (ja) * 2005-11-11 2008-06-12 Mitsubishi Materials Corp 太陽電池の電極形成用組成物及び該電極の形成方法並びに該形成方法により得られた電極を用いた太陽電池
JP4265127B2 (ja) 2000-12-12 2009-05-20 三菱マテリアル株式会社 低温燒結性に優れた銀粘土用銀粉末およびこの銀粉末を含む銀粘土
WO2012026033A1 (fr) * 2010-08-27 2012-03-01 Ｄｏｗａエレクトロニクス株式会社 Composition de nanoparticules d'argent frittables à basse température et composant électronique formé en utilisant cette composition

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0426707A (ja) 1990-05-18 1992-01-29 Mitsubishi Materials Corp 貴金属造形用可塑性組成物
JPH0497940A (ja) * 1990-08-14 1992-03-30 Dow Chem Co:The 無機粉末スラリーの製造方法
JP2003521580A (ja) * 1999-07-15 2003-07-15 アライドシグナル インコーポレイテッド 水性射出成形フィードストックの連続コンパウンディング
JP4265127B2 (ja) 2000-12-12 2009-05-20 三菱マテリアル株式会社 低温燒結性に優れた銀粘土用銀粉末およびこの銀粉末を含む銀粘土
JP2005187858A (ja) 2003-12-25 2005-07-14 Mitsubishi Materials Corp 銀粘土焼成体表面装飾用ペースト
JP2008135416A (ja) * 2005-11-11 2008-06-12 Mitsubishi Materials Corp 太陽電池の電極形成用組成物及び該電極の形成方法並びに該形成方法により得られた電極を用いた太陽電池
WO2012026033A1 (fr) * 2010-08-27 2012-03-01 Ｄｏｗａエレクトロニクス株式会社 Composition de nanoparticules d'argent frittables à basse température et composant électronique formé en utilisant cette composition

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Title
See also references of EP2979782A4

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015080128A1 (fr) * 2013-11-28 2015-06-04 三菱マテリアル株式会社 Composition argileuse pour comprimé fritté de métal noble
WO2015080181A1 (fr) * 2013-11-28 2015-06-04 三菱マテリアル株式会社 Corps moulé de type en argile permettant de former un compact fritté en un métal noble
US10239121B2 (en) 2013-11-28 2019-03-26 Mitsubishi Materials Corporation Clay-like composition for sintered precious metal body

Also Published As

Publication number Publication date
EP2979782B1 (fr) 2018-08-22
EP2979782A4 (fr) 2016-11-30
JP2014189896A (ja) 2014-10-06
JP6090664B2 (ja) 2017-03-08
EP2979782A1 (fr) 2016-02-03
US20160001363A1 (en) 2016-01-07

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