Non-aqueous borate routes to boron nitride

Details Non-aqueous borate routes to boron nitride Non-aqueous borate routes to boron nitride

2007-02-12

2008-05-13

Langel, Wayne A. (Department: 1793)

Chemistry of inorganic compounds

Boron or compound thereof

Oxygen containing

C423S290000

Reexamination Certificate

active

07371359

ABSTRACT:
A non-aqueous route and process for preparation of boron nitride utilizing aerosol assisted vapor phase synthesis (AAVS) wherein boron precursors are nitrided in one or two heating steps, and wherein a boron oxide nitride carbide intermediary composition is formed after the first heating step and may be further nitrided to form resultant spheroidal boron nitride powders including dense or hollow spheroidal particles that are smooth, bladed, dense or hollow, have protruding whiskers, and are of turbostratic or hexagonal crystalline structure, specifically wherein the boron precursor is dissolved in a non-aqueous solution prior to aerosolization.

REFERENCES:
patent: 4744831 (1988-05-01), Beck
patent: 4971779 (1990-11-01), Paine et al.
patent: 6348179 (2002-02-01), Paine et al.
patent: 6652822 (2003-11-01), Phillips et al.

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