ZHU Sujuan ¹ , CHEN Yong ¹ , XIAO Weilong ¹ , ZHANG Haitao ¹ , DENG Xiangyun ^1,2 , LI Jianbao ^1,3 , QIU Wenda ¹ ZHANG Wen ¹

(1. Key Laboratory of Ministry of Education for Application Technology of Chemical Materials in Hainan Superior Resources and Hainan Provincial Key Laboratory of Research on Utilization of Si-Zr-Ti Resources. Materials and Chemical Engineering Institute, Hainan University, Haikou Hainan 570228,China; 2. College of Physics and Electronic Information, Tianjin Normal University, Tianjin 300387,China; 3. Department of Materials Science and Engineering, Tsinghua University, Beijing 100084,China)

Abstract: Porous ceramics were prepared by means of dry pressing and liquid -phase sintering, using quartz sand as main materials. Scanning electronic microscopy (SEM) was employed to characterize the microstructure of porous ceramics. The effects of sintering process (sintering temperature and holding time) on the performance (porosity and breaking strength) of porous ceramics were investigated. The results show that the porosity decreased while the breaking strength increased with the increasing of the sintering temperature and the soaking time; the optimal sintering temperature and holding time are 1250℃ and 30min. Porous ceramics obtained under the optimal sintering conditions have high porosity and uniform pore size distribution with the average pore diameter of 12.41μm.

Keywords: porous ceramics, sintering temperature, holding time, porosity, breaking strength