文献类型：期刊文献

中文题名：凝胶注模碳化硅复相陶瓷支撑体的结构及性能

英文题名：Structure and Property of Silicon Carbide Substrate with Composite Phase by Gel-casting

作者：岳翠芳[1];黄建国[1]

机构：[1]华东理工大学材料科学与工程学院,上海200237

年份：2017

卷号：45

期号：6

起止页码：811

中文期刊名：硅酸盐学报

外文期刊名：Journal of The Chinese Ceramic Society

收录：CSTPCD;;EI(收录号：20173804185309);Scopus;北大核心:【北大核心2014】；CSCD:【CSCD2017_2018】；

语种：中文

中文关键词：支撑体;碳化硅;凝胶注模;堇青石

外文关键词：substrate; silicon carbide; gel-casting; cordierite

摘要：以SiC粉体(D_(50)=10.38μm)为主要原料,添加少量堇青石、Al_2O_3、石墨,通过凝胶注模法制备堇青石、莫来石结合的SiC复相陶瓷管状支撑体。研究了堇青石、石墨造孔剂添加量、烧结温度等对支撑体物相组成及显微结构、孔隙率、孔径分布、抗弯强度等性能的影响。结果表明:当碳化硅含量为70%(质量分数),堇青石、Al_2O_3、石墨添加量均为10%时,支撑体孔隙率达到42.84%,抗弯强度为40.3 MPa。在1 400℃烧结温度下,可获得SiC为主晶相、堇青石和莫来石为次晶相的三相共存陶瓷支撑体。支撑体具有连通的孔结构,孔径分布范围从0.66到3.22μm,适合作为陶瓷膜的基体。
Tubular silicon carbide suhstrates with composite phase were fabricated by a gel-casting method using silicon carbide powder （D50=10.38 μm）, and a small amount of cordierite, alumina and graphite. The effects of sintering temperature, contents of cordierite and graphite on the phase composition, microstructure, porosity, pore size distribution, flexural strength of the substrates were investigated. The results show that the porosity and the flexural strength of the porous substrate with 70% of silicon carbide （in mass fraction）, 10% of cordierite, 10% of alumina and 10% of graphite are 42.84% and 40.3 MPa, respectively. At 1 400 ℃, three-phase coexisting ceramic substrate with SiC as a main crystal phase, cordierite and mullite as a secondary crystal phase can be obtained. The substrate has connected pore channel, and the pore size distribution ranges from 0.66 to 3.22 μm, which is suitable as a substrate for ceramic membranes.