Research progress in ceramic fiber preparation technology
The research status and technical difficulties of the preparation technologies for different types of ceramic fibers,such as quartz fiber,silicon carbide fiber,silicon nitride fiber,boron nitride fiber,alumina fiber,mullite fiber and aluminum silicate fiber,etc.,were reviewed.Quartz fibers are mainly prepared by sol-gel method and need to be coated with boron nitride on the fiber surface to improve the interface crystallization behavior.Silicon carbide fibers are mainly prepared by precursor con-version method and activated carbon conversion method and need to be coated to enhance their performance.Silicon nitride fibers are prepared by sol-gel method and carbothermal reduction nitridation method.Boron nitride fibers are mainly prepared by inor-ganic conversion method and organic precursor method.Sol-gel method is the main method for preparing alumina,mullite and a-luminum silicate fibers.The domestic research on ceramic fibers should be focused on the further improvement of ceramic fiber performance,the development of new fiber varieties,the improvement of the preparation technology level,the strengthening of application research and the expansion of the application fields in the future.
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