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Effect of Thermal Initiator Concentrations on the Structure and Optical Band Gaps of Polyvinylsilazane‐Derived SiOCN Ceramics
Author(s) -
Li Yan,
Yu Yuxi,
San Haisheng,
Wang Yansong,
Han Qingkai,
Fang Jiyu,
An Linan
Publication year - 2015
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.12375
Subject(s) - materials science , ceramic , electron paramagnetic resonance , band gap , transmission electron microscopy , thermal decomposition , scanning electron microscope , diffraction , analytical chemistry (journal) , composite material , optics , nuclear magnetic resonance , optoelectronics , nanotechnology , chemistry , organic chemistry , physics
Si OCN ceramics are formed by the thermal decomposition of a polyvinylsilazane precursor in the presence of a dicumyl peroxide ( DP ) thermal initiator with different concentrations. The Si OCN ceramics pyrolyzed at 1000°C with different concentrations of DP are characterized with X‐ray diffraction, transmission electron microscope, electron paramagnetic resonance, and UV ‐visible spectroscopy. We find that the structure and optical band gap of the Si OCN ceramics can be changed by altering the concentration of DP . There is a critical concentration, at which the structural and optical behavior varied in different ways as a function of the concentration of DP . The detailed mechanism is discussed.