Method of sintering articles of silicon nitride

US4908171A · kind A · utility

Assignee

• Max-Planck-Gesellschaft zur Föderung der Wissenschaften e.V. · US

Inventors

• Nils Claussen · Schwäbisch Hall, DE
• Jurgen Jahn · Mindelheim, DE
• Gunter Petzow · Echterdingen, DE

Key dates

• Filing date: Jan 27, 1988
• Grant date: Mar 13, 1990
• Expiry date: Jan 27, 2008

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B35/593
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A novel method of sintering Si.sub.3 N.sub.4 shaped bodies which method comprises grinding Si.sub.3 N.sub.4 with the use of a grinding material down to a surface area magnitude of 10.5 to 35 m.sup.2 /g and an average particle size from 0.2 to 0.005 .mu.m, shaping the powder obtained, and sintering the compact under inert gas or nitrogen at a temperature from 1700.degree. to 1900.degree. C.