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The Reaction Mechanism and Kinetics of α‐ BN Powder in Wet Air at 1273 K
Author(s) -
Hou Xinmei,
Yu Ziyou,
Chen Zhiyuan,
Chou KuoChih,
Zhao Baojun
Publication year - 2013
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/jace.12276
Subject(s) - thermogravimetric analysis , electron microprobe , scanning electron microscope , microanalysis , reaction mechanism , powder diffraction , boron nitride , kinetics , analytical chemistry (journal) , reaction rate , thermogravimetry , mass spectrometry , chemical kinetics , boron , electron probe microanalysis , materials science , order of reaction , chemistry , mineralogy , crystallography , inorganic chemistry , reaction rate constant , nanotechnology , composite material , chromatography , catalysis , organic chemistry , physics , quantum mechanics
The reaction behavior of α‐Boron nitride ( BN ) powder in wet air was investigated at 1273 K using thermogravimetric (TG) analysis, X‐ray diffraction (XRD), and mass spectrometry. Scanning electron microscopy and electron probe X‐ray microanalysis (EPMA) were used to analyze the morphological and elemental development of the sample. The results show that the reaction process consists of two stages: the oxidation of BN powder to form B 2 O 3 and the further reaction of B 2 O 3 with H 2 O . In the first stage, the oxidation reaction occurs very quickly and can be described by Chou's model. In the second stage, the reaction rate followed the linear rate law.