Get access
Advertisement

Structure and Optical Property of Polymer-Derived Amorphous Silicon Oxycarbides Obtained at Different Temperatures

Authors

  • Yiguang Wang,

    1. National Key Laboratory of Thermostructure Composite, Northwestern Polytechnical University, Xi'an,Shaanxi 710072, China
    Search for more papers by this author
    • *Member, The American Ceramic Society.

  • Kewei Wang,

    1. National Key Laboratory of Thermostructure Composite, Northwestern Polytechnical University, Xi'an,Shaanxi 710072, China
    Search for more papers by this author
  • Ligong Zhang,

    1. Laboratory of Excited State Process, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Science, Changchun 130032, China
    Search for more papers by this author
  • Linan An

    Corresponding author
    1. National Key Laboratory of Thermostructure Composite, Northwestern Polytechnical University, Xi'an,Shaanxi 710072, China
    2. Advanced Materials Processing and Analysis Center, University of Central Florida, Orlando, Florida 32816
      †Author to whom correspondence should be addressed. e-mail: lan@mial.ucf.edu
    Search for more papers by this author
    • *Member, The American Ceramic Society.


  • R. Riedel—contributing editor

  • This work was supported by the “111” program (B08040), the National Science Foundation of USA (DMR-0706526), and the National Natural Science Foundation of China (Grant No: 50972140).

†Author to whom correspondence should be addressed. e-mail: lan@mial.ucf.edu

Abstract

Amorphous silicon carbides are prepared by pyrolysis of a polycarbosilane precursor at different temperatures between 1000° and 1400°C. The structures of the resultant materials are analyzed using X-ray diffraction, electron paramagnetic resonance, and Raman spectroscopy. The optical properties of the SiC ceramics are investigated by measuring their absorption spectra. It is found that there is a critical temperature range, at which the structural and optical behavior varied in different ways as a function of pyrolysis temperature. The evolution in structures is discussed and the optical behavior is explained in terms of the structural evolution during pyrolysis at different temperatures.

Get access to the full text of this article

Ancillary