FU Zhensheng , JIN Jiang
(College of Material Science and Engineering, Nanjing University of Technology, Nanjing Jiangsu 210009, China)
Abstract: The porous silicon ceramic materials were prepared from SiO2 and sawdust. The tests of porosity, flexural strength and dielectric properties and SEM are used to examine the effects of the pore-forming agent and the sintering additives on the properties of the materials. The results show: the highest value of the flexural strength of the sample made with sintering additives can reach 14.80MPa; sawdust is a useful pore-forming agent; the porosity of the sample can reach 48.40%, and the dielectric constant can reach as low as 3.0.
Key words: porous materials; low dielectric constant; silicon ceramic; sawdust