【作者】 刘洪丽； 田春英； 李洪波；

【Author】 Liu Hongli Tian Chunying Li Hongbo (School of Materials Science and Engineering,Jiamusi University,Hei Longjiang 154007,China)

【机构】 佳木斯大学材料科学与工程学院；

【摘要】 采用陶瓷先驱体聚硅氧烷(PSO)为原料,用聚乙烯醇缩丁醛(PVB)为造孔剂制备 SiOC 泡沫陶瓷。通过对 PVB 及 PSO 进行热分析制定温度曲线。研究了裂解温度、造孔剂含量对泡沫陶瓷抗压强度及孔隙率的影响,采用 XRD、SEM 对 SiOC 泡沫陶瓷进行物相和微观结构分析。结果表明,在 1000℃～1400℃温度范围内.随着温度的升高,泡沫陶瓷的抗压强度先升高后降低,而孔隙率逐渐降低;随着造孔剂含量的增加,泡沫陶瓷的抗压强度逐渐减小,孔隙率逐渐增大。当裂解温度为1250℃,PVB 的含量为50%时所制备的泡沫陶瓷的抗压强度为52.3 MPa,孔隙率为58%,微观结构分析显示,SiOC 泡沫陶瓷微孔分布均匀,以三维交错的网状孔道相互贯穿。更多还原

【Abstract】 In this exeperiment,the SiOC ceramic foam was prepared u- sing polysiloxane as main material and po]yvinyl butyral as pore-forming agent.The effect of the pyrolysis temperature and the content of pore- forming agent on the compression strength and porosity of ceramic foam was studied,and the SEM of ceramic foam was analysed.The result re- veals,with the increasing of the content of pore-forming agent,the poros- ity increases and the compression strength decreases.Between 1000℃ and 1400℃,with the increasing of pyrolysis temperature,the compres- sion strength increases and then decreases,and the porosity decreases continually.Compression strength and porosity are 52.3 MPa and 58% respectively when the content of polyvinyl butyral and the pyrolysis tem- perature are 50% and 1250℃ respectively.Microstructure study reveals that the micro-pore shape of SiOC ceramic foam is uniform,among which is the web of three-dimensional intervein.更多还原