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Boron Nitride Powders Formed by Aerosol Decomposition of Poly(borazinylamine) Solutions
Author(s) -
Lindquist David A.,
Kodas Toivo T.,
Smith Douglas M.,
Xiu Xiaomei,
Hietala Susan L.,
Paine Robert T.
Publication year - 1991
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1991.tb04310.x
Subject(s) - boron nitride , aerosol , materials science , sintering , calcination , amorphous solid , chemical engineering , particle (ecology) , decomposition , porosity , nitride , boron , particle size , mineralogy , composite material , chemistry , crystallography , layer (electronics) , organic chemistry , oceanography , engineering , geology , catalysis
Micrometer‐sized aerosol droplets of a liquid ammonia solution of poly(borazinylamine) were formed in a nitrogen carrier gas by using an aerosol generator. The resulting droplets were thermally decomposed in a flow reactor at 1000°C. The white powder obtained was amorphous to X‐rays and spherical with particle sizes on the order of 0.5 μm. The particles at this stage were porous, and some appeared to exhibit a hollow‐shell morphology. Subsequent calcining at 1600°C yielded dense, crystalline boron nitride powder with partial sintering.