Method for the preparation of boron nitride powder
OwnerEmanual Prilutsky, Oleg Prilutsky +1inventors
InventorsEmanual Prilutsky, Oleg Prilutsky, Dan Yardeni
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Abstract
This invention is directed to a process for the preparation of boron nitride powder, particularly a fine powder with a low degree of contamination, which demonstrates good caking, heat conductivity and dielectric properties. Specifically, a process for the preparation of amorphous boron nitride (a-BN) is provided wherein the process comprises: mixing powders of boric acid and a carbamide at a temperature in the range of about 250-300° C., thereby forming: ammonium polyborates; boron imide or a mixture thereof and ammonia; and heating of the materials formed in step (a) to a temperature in the range of about 500-600° C., thereby forming a powder of a-BN.
Claims17
A process for the preparation of amorphous boron nitride (a-BN) comprising:
- a. mixing powders of boric acid and a carbamide at a temperature in the range of about 250-300° C., thereby forming:
- ammonium polyborates;
- boron imide or a mixture thereof and ammonia;
- and
- b. heating of the materials formed in step (a) to a temperature in the range of about 500-600° C., thereby forming a powder of a-BN.
Dependencies are inferred from the claim text.