(State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China)
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DOI:
10.7502/j.issn.1674-3962.2012.10.01
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Abstract:
Binary system SiC，Si 3N 4，BN has served already in industrial application with isolated merit, for instance high temperature mechanic properties，excellent dielectric properties and high temperature thermal stability respectively. Although SiBN(C) ceramic fibers still wander at the outset of research, combining merit of various binary ceramic fibers, are expected to possess comprehensive properties, including high temperature stability and oxidation resistance at high temperature, particular in excellent wavetransparent, it will play an important role in random application Precursor polymerderived ceramic is the main method to produce SiBN(C) ceramic fibers, by which one can design the molecular structure of precursor polymer, the molecular precursor with objective elements can be obtained. Furthermore, the precursor polymer with good spinnability can be obtained by controlling its rheological properties during the polymerization. Three methods for preparing SiBN(C) ceramic fibers were reviewed in this paper, boronsubstituted polysilazane, boronbased polyborlysilazane, molecular preparation of polyborlysilazane. The small molecule monomer synthesis also can be divided into multipot and onepot synthesis method. Chart comparing the synthesis route , performance of SiBN (C) ceramic fiber products , as well as the existence of the problems for various methods, and the directions and recommendations for further research and development were put forward finally.