含Si-H键硅炔聚合物的陶瓷化及其多孔陶瓷材料的制备与性能

Ceramicization of Silicon-acetylene Polymer Containing Si-H Bond and Properties of Prepared Porous Ceramic Materials

以含Si-H键硅炔聚合物为先驱体,采用先驱体转化法制备一种硅基陶瓷,研究含Si-H键硅炔聚合物的陶瓷化过程。并以此为基础,通过牺牲模板法制备多孔陶瓷材料。采用SEM、EDS、XRD、Raman等方法研究陶瓷化产物及其多孔陶瓷材料的性能。结果表明:陶瓷化温度从1 000℃升高至1 600℃,都具有较高的陶瓷化产率(>75%),无定形碳向石墨碳转化的程度不断增大。所制备的多孔陶瓷材料密度为0.29 g·cm^(-3),比表面积约为532.8 cm^(2)·g^(-1),孔径分布主要集中在4 nm左右。

A silicon-based ceramic was prepared by the precursor transformation method,and the ceramic process of silicon-acetylene polymer containing Si-H bond was studied.On this basis,porous ceramic materials were prepared by sacrificial template method.The properties of ceramic products and porous ceramic materials were studied by SEM,EDS,XRD and Raman methods.The results showed that higher ceramicization yield was obtained when the temperature increased from 1000℃ to 1600℃(>75%),the degree of conversion of amorphous carbon to graphitic carbon was increasing.The prepared porous ceramic material had a density of 0.29 g·cm^(-3),a specific surface area of 532.8 cm^(2)·g^(-1),and a pore size distribution of about 4 nm.