Synthesis and processing of monosized oxide powders

US4543341A · kind A · utility

Assignee

• Massachusetts Institute of Technology · US

Inventors

• Eric A. Barringer · Waltham, US
• M. Bruce Fegley, Jr. · Newton, US
• H. Kent Bowen · Belmont, US

Key dates

• Filing date: Dec 23, 1983
• Grant date: Sep 24, 1985
• Expiry date: Dec 23, 2003

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01P2006/80
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Uniform-size, high-purity, spherical oxide powders are formed by hydrolysis of alkoxide precursors in dilute alcoholic solutions. Under controlled conditions (concentrations of 0.03 to 0.2 M alkoxide and 0.2 to 1.5 M water, for example) oxide particles on the order of about 0.05 to 0.7 micron can be produced. Methods of doping such powders and forming sinterable compacts are also disclosed.