Methods and compostions involving high specific surface area carbides and nitrides

US4851206A · kind A · utility

Assignee

• The Board of Trustees of the Leland Stanford Junior University, Stanford University · US

Inventors

• Michel Boudart · Portola Valley, US
• Shigeo Ted Oyama · Los Altos, US
• Leo Volpe · Collingswood, US

Key dates

• Filing date: Oct 5, 1987
• Grant date: Jul 25, 1989
• Expiry date: Oct 5, 2007

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/52
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Methods and compostions produced thereby are provided concerning the preparation and use of high specific surface area carbides and nitrides. The carbides and nitrides can be obtained by thermal reduction of oxides in the presence of a source of carbon and nitrogen respectively, with relatively slow progressive temperature increases prior to completion of the reaction, followed by quenching. Novel metastable carbides can be obtained by carburization of nitrides having high surface area, which nitrides can be prepared by the above-described process.