Process for producing wurtzitic or cubic boron nitride

Patent · Wed Jan 01 00:00:00 EST 1992

OSTI ID:868264

Holt, J Birch ^[1]; Bianchini, Gregory M ^[2]

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1. San Jose, CA
2. Livermore, CA

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.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
• DOE Contract Number: W-7405-ENG-48
• Assignee: Regents of University of California (Oakland, CA)
• Patent Number(s): US 5108966
• OSTI ID: 868264
• Country of Publication: United States
• Language: English

Related Subjects

process
producing
wurtzitic
cubic
boron
nitride
disclosed
comprising
steps
preparing
intimate
mixture
powdered
oxide
metal
selected
consisting
magnesium
aluminum
azide
igniting
bringing
temperature
self-sustaining
combustion
occurs
shocking
pressure
wave
forming
reaction
product
occluded
optionally
removing
products
described
metal azide
cubic boron
boron oxide
boron nitride
metal oxide
reaction product
reaction products
metal selected
powdered metal
pressure wave
combustion occurs
self-sustaining combustion
intimate mixture
process described
producing wurtzitic
/501/51/423/