TY - JOUR
T1 - Synthesis of boron nitride from boron oxide using super-critical ammonia
AU - Yokoi, Keiichi
AU - Ito, Kimihisa
AU - Tokuda, Masanori
N1 - Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 1995
Y1 - 1995
N2 - Hexagonal boron nitride was synthesized from boron oxide using super critical ammonia and solid CaO below the melting point of B2O3 by the following reaction: B2O3 (s)+2NH3 (super-critical fluid)+3CaO (s) = 2BN (s)+3Ca(OH)2 (s). The experiment was carried out at 623-753 K and the initial ammonia pressure was 3.0-40.0 MPa. The mean diameter of obtained BN particles was 0.2-0.3 μm. The yield of BN increased with increasing temperature, initial ammonia pressure and the addition of CaO. The thermochemical calculation showed that the CaO addition suppressed the decomposition loss of ammonia during the reaction.
AB - Hexagonal boron nitride was synthesized from boron oxide using super critical ammonia and solid CaO below the melting point of B2O3 by the following reaction: B2O3 (s)+2NH3 (super-critical fluid)+3CaO (s) = 2BN (s)+3Ca(OH)2 (s). The experiment was carried out at 623-753 K and the initial ammonia pressure was 3.0-40.0 MPa. The mean diameter of obtained BN particles was 0.2-0.3 μm. The yield of BN increased with increasing temperature, initial ammonia pressure and the addition of CaO. The thermochemical calculation showed that the CaO addition suppressed the decomposition loss of ammonia during the reaction.
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U2 - 10.2320/matertrans1989.36.645
DO - 10.2320/matertrans1989.36.645
M3 - Article
AN - SCOPUS:0029304469
SN - 0916-1821
VL - 36
SP - 645
EP - 648
JO - Materials Transactions, JIM
JF - Materials Transactions, JIM
IS - 5
ER -