Porous SiO₂/SiC Fiber Via Carbothermal-Reduction of Hybrid Fiber in Air Flows

Abstract:

Using tetraethoxysilane (TEOS) and novolac-PF as raw materials, SiO₂/PF hybrid fibers were prepared via sol-gel associated with drawing process, and then sintered at different temperatures (500-1300 °C) under air atmosphere. The microstructure variation and reaction mechanism of the fiber were investigated by FT-IR, XRD, and SEM measurements. The results showed that the microstructure variation of the hybrid fiber was influenced greatly by sintering temperatures. When the sintering temperature was below 900 °C, the fibers were amorphous, and converted into porous SiO₂/SiC fibers after being sintered at 1300 °C.

• Periodical: Advanced Materials Research (Volumes 236-238)
• Pages: 1492-1496
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.236-238.1492
• Online since: May 2011
• Authors: Qiu Sheng Song, Kai Zhang, Shun Xu, Zhen Biao Zhong, Meng Li
• Keywords: Carbothermal-Reduction, Hybrid Fiber, SiO2/SiC, Sol-Gel Method

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