Effects of SiC on the Properties of Sintering Cordierite Ceramics

Cordierite ceramics were successfully sintered by kaolin,talc and alumina.The effects of adding different weight fraction of SiC on the phase components and properties of sintering cordierite ceramics were studied using X-ray diffractometer,scanning electronic microscope and thermal-mechanical dilatometer.Also the effects of additive SiC with different particle sizes on the strength of cordierite ceramics were compared.The results show that the bending strength,density,and thermal expansion coefficient increase with increasing SiC content in raw materials.The appropriate SiC content is 5%,and the appropriate SiC size is 5.0μm.And the strength of cordierite ceramics increases to 41.9%,but expansion coefficient increases a little.