Effect of Thermal Initiator Concentrations on the Structure and Optical Band Gaps of Polyvinylsilazane‐Derived SiOCN Ceramics |
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| Authors: | Yan Li Yuxi Yu Haisheng San Yansong Wang Qingkai Han Jiyu Fang Linan An |
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| Affiliation: | 1. Fujian Key Laboratory of Advanced Materials, Department of Materials Science and Engineering, College of Materials, Xiamen University, Xiamen, China;2. Key Laboratory of Optical System Advanced Manufacturing Technology, Changchun Institute of Optics, Fine Mechanics and Physics, CAS, Changchun, China;3. School of Mechanical Engineering, Dalian University of Technology, Dalian, China;4. Department of Materials Science and Engineering and Advanced Materials Processing and Analysis Center, University of Central Florida, Orlando, Florida |
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| Abstract: | SiOCN 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 SiOCN 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 SiOCN 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. |
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