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41. 发明授权

US5328775A Moldable mixture for use in the manufacturing of precious metal articles 失效
标题翻译：用于制造贵金属制品的可成型混合物
公开(公告)号：US5328775A
公开(公告)日：1994-07-12
申请号：US978507
申请日：1992-11-18
申请人： Koji Hoshino , Masaki Morikawa , Tohru Kohno , Koshiro Ueda , Masaki Miyakawa
发明人： Koji Hoshino , Masaki Morikawa , Tohru Kohno , Koshiro Ueda , Masaki Miyakawa
IPC分类号： A44C27/00 , B22F3/22 , B22F9/24 , B44C5/00 , C22C1/04 , B22F1/00
CPC分类号： C22C1/0466 , A44C27/003 , B22F3/22 , B22F9/24 , B44C5/00 , B22F2998/00 , Y10T428/12111
摘要： There is disclosed a precious metal article which is formed of a solid-phase sintered product of a precious metal powder. For manufacturing the precious metal article, a moldable mixture which contains a precious metal powder and a binder removable by sintering is shaped into a prescribed molded object, and the molded object is then subjected to sintering. The moldable mixture is produced by preparing a precious metal powder, preparing a jellylike cellulose binder by blending a cellulose with water and leaving for a prescribed period of time, and blending the precious metal powder and the jellylike cellulose binder together. The most preferable moldable mixture contains 50 to 90% by weight of precious metal powder, 0.8 to 8% by weight of water-soluble cellulose binder, 0.08 to 3% by weight of a surface-active agent. 0.1 to 3% by weight of oil, balance water and unavoidable impurities. The precious metal powder preferably contains gold powder and powder of an alloy containing silver or copper, and the gold powder is obtained by submerged-reduction method.
摘要翻译：公开了由贵金属粉末的固相烧结体形成的贵金属制品。为了制造贵金属制品，将含有贵金属粉末和通过烧结除去的粘合剂的可成型混合物成形为规定的成型体，然后对成形体进行烧结。可成型混合物通过制备贵金属粉末，通过将纤维素与水混合并保持规定的时间来制备果冻状纤维素粘合剂，并将贵金属粉末和果冻状纤维素粘合剂混合在一起。最优选的可模制混合物包含50-90％重量的贵金属粉末，0.8-8％重量的水溶性纤维素粘合剂，0.08-3％重量的表面活性剂。油重0.1〜3％，水分平衡和不可避免的杂质。贵金属粉末优选含有金粉末和含有银或铜的合金粉末，并且通过浸没还原法获得金粉末。

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