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BN powder synthesis at low temperatures.

Authors
Kalyoncu-RS
Source
Ceram Eng Sci Proc 1985 Sep; 6(9-10):1356-1364
NIOSHTIC No.
10005103
Abstract
The Bureau of Mines has devised a laboratory technique for preparing ultrafine boron nitride (BN) powders through the formation of elemento-organic BN precursor compounds at low temperatures. Structural materials produced from such highly reactive powders may have applications in the severe conditions of temperature, pressure, and environment encountered in mining and mineral processing. The reactions of sodium borohydride (NaBH4) with ammonium chloride (NH4Cl) in an organic solvent such as chlorobenzene, ammonia (NH3) with boron trichloride (BCl3), and NH4Cl with BCl3 were studied at temperatures ranging from -75 deg to 200 deg c. All three reaction systems resulted in the formation of precursor compounds, the carbothermic decomposition of which yielded ultrafine amorphous BN powders.
Keywords
Nanotechnology; Author Keywords: elemento-organic; mineral processing; mechanical strength; resistance; synthesis
CODEN
CESPDK
Publication Date
19850901
Document Type
OP; Journal Article
Fiscal Year
1985
NTIS Accession No.
NTIS Price
Identifying No.
OP 52-86
Issue of Publication
9-10
ISSN
0196-6219
NIOSH Division
TURC
Source Name
Ceramic Engineering and Science Proceedings. Proceedings of the Conference on Raw Materials for Advanced and Engineered Ceramics
State
AL
Performing Organization
University of Alabama
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