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Preparation and Properties of Porous Silicon Carbide Ceramic by Gelcasting
Authors： BIAN Qiang,ZHANG Hanyu，FAN Yiqun
Units： State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing University of Technology, Nanjing 210009, China
KeyWords： porous silicon carbide; gelcasting; in-situ reaction; hot gas purification
ClassificationCode：TQ174
year,volume(issue):pagination： 2014, 34(1):29-33

Abstract：

 Porous silicon carbide(SiC) ceramics used for hot gas purification were prepared from SiC particle by an in-situ reaction, the ceramic green body was fabricated by gelcasting. This work mainly investigated the influences of monomer content and sintering procedure on the performance of porous SiC ceramic. The results indicate that the SiC particles dispersed stably in the slurry with suitable monomer content. The oxidation degree of SiC is raised with the sintering temperature and holding time increasing. The XRD analysis reveals the mullite is formed when the temperature reaches to 1550 oC which could obviously improve the flexural strength. Porous SiC ceramics with good properties can be prepared by gelcasting when sintered at 1550 oC for 4 h. The flexural strength, porosity, average pore size, and N2 permeability of the porous ceramics are about 20.4 MPa, 37%, 23 μm and of 2.01×10-12 m2, respectively.

Funds：
国家“863”计划课题(2012AA03A606)、江苏高校优势学科建设工程资助项目

AuthorIntro：
卞强(1988-), 男, 江苏省张家港市人, 硕士, 从事膜分离材料的研究与应用. *通讯联系人

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