中文摘要：

本文以SiC粉末、烧高岭土、AI（OH）2粉末为主要原料，采用添加造孔剂法制备了多孔碳化硅／莫来石复合陶瓷，研究了造孔剂、烧结助剂、温度对多孔碳化硅／莫来石复合陶瓷性能的影响，并分别用XED和SEM分析晶相组成和断面显微结构。结果表明：随着石墨含量的增加，气孔率呈递增趋势，而抗弯强度的变化则相反。当Y2O3含量为1．5％，石墨含量为15％时，在1350℃下保温5h制备的样品抗折强度为34．31MPa,，其孔隙率达到46．15％。

英文摘要：

In this experiment, porous silicon cabide/mullite composite ceramics were prepared by adding pore-forming material method from SiC powder, calcined kaolin and aluminum hydroxide powder. The influence of pore-forming material, sintering additives, and sintering temperatures on the properties of porous silicon cabide/mullite composite ceramics were investigated. The grain phases and the fracture surface micrograph were analyzed with XRD and SEM, respectively. The results show that：porosity showed an increasing trend, while the opposite change in flexural strength with the increase of the graphite content. The sample sintered at 1350 ℃ for 3 h with 1.5% Y203 and 15% graphite exhibits properties： flexural strength of 34.31 MPa was achieved at a porosity of 46.15%.