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Title: Process for producing wurtzitic or cubic boron nitride

Abstract

Disclosed is a process for producing wurtzitic or cubic boron nitride comprising the steps of: [A] preparing an intimate mixture of powdered boron oxide, a powdered metal selected from the group consisting of magnesium or aluminum, and a powdered metal azide; [B] igniting the mixture and bringing it to a temperature at which self-sustaining combustion occurs; [C] shocking the mixture at the end of the combustion thereof with a high pressure wave, thereby forming as a reaction product, wurtzitic or cubic boron nitride and occluded metal oxide; and, optionally [D] removing the occluded metal oxide from the reaction product. Also disclosed are reaction products made by the process described.

Inventors:
; ;
Issue Date:
OSTI Identifier:
7274347
Patent Number(s):
5108966 A
Application Number:
PPN: US 7-497688
Assignee:
Univ. of California, Oakland, CA (United States) PTO; EDB-94-081798
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Resource Relation:
Patent File Date: 23 Mar 1990
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; BORON NITRIDES; FABRICATION; IGNITION; REMOVAL; SHOCK WAVES; BORON COMPOUNDS; NITRIDES; NITROGEN COMPOUNDS; PNICTIDES; 360201* - Ceramics, Cermets, & Refractories- Preparation & Fabrication

Citation Formats

Holt, J.B., Kingman, D.D., and Bianchini, G.M. Process for producing wurtzitic or cubic boron nitride. United States: N. p., 1992. Web.
Holt, J.B., Kingman, D.D., & Bianchini, G.M. Process for producing wurtzitic or cubic boron nitride. United States.
Holt, J.B., Kingman, D.D., and Bianchini, G.M. Tue . "Process for producing wurtzitic or cubic boron nitride". United States.
@article{osti_7274347,
title = {Process for producing wurtzitic or cubic boron nitride},
author = {Holt, J.B. and Kingman, D.D. and Bianchini, G.M.},
abstractNote = {Disclosed is a process for producing wurtzitic or cubic boron nitride comprising the steps of: [A] preparing an intimate mixture of powdered boron oxide, a powdered metal selected from the group consisting of magnesium or aluminum, and a powdered metal azide; [B] igniting the mixture and bringing it to a temperature at which self-sustaining combustion occurs; [C] shocking the mixture at the end of the combustion thereof with a high pressure wave, thereby forming as a reaction product, wurtzitic or cubic boron nitride and occluded metal oxide; and, optionally [D] removing the occluded metal oxide from the reaction product. Also disclosed are reaction products made by the process described.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1992},
month = {4}
}