Method of producing alloyed powders for dental amalgams

US4859412A · kind A · utility

Inventors

• Werner Groll · Alzenau, DE
• Doris Hathaway · Hanau, DE
• Gernot Schock · Bruchköbel, DE

Key dates

• Filing date: May 23, 1988
• Grant date: Aug 22, 1989
• Expiry date: May 23, 2008

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C22C13/00
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

An economical alloyed powder for dental amalgams exhibiting good working properties is obtained from pressed and sintered molded bodies by mechanical comminution. The formed body is produced by mixing and pressing powders of elemental silver, copper and tin with a subsequent sintering between 150.degree. C. and the solidus temperature of the alloy being formed. The sintering is performed until a homogeneous distribution of the tin has been achieved in the silver and copper particles.