锆元素对硅树脂转化SiOC玻璃结构演变的影响(英文)

Effect of Zirconium Additive on Structure Evolution of Silicon Oxycarbide Derived from Polysiloxane

通过硅树脂与含锆硅树脂在1000℃Ar下的裂解,制备出SiOC与SiZrOC玻璃,然后在真空中1200,1250,1300℃下进行热处理,以研究高温下的结构演变行为。利用SEM、XRD和元素分析手段分析测试了这两种玻璃的组成和结构。结果表明,锆的引入可以阻碍碳热还原反应,从而提高SiOC玻璃的热稳定性。

Silicon oxycarbide(SiOC) and zirconium-containing silicon oxycarbide(SiZrOC) glasses were obtained through pyrolysis in argon atmosphere at 1000℃ of a polymethyl(phenyl) siloxane resin and zirconium n-butoxide-derived siloxane networks.These glasses were further annealed at 1200,1250,and 1300℃ in vacuum atmosphere to investigate their high-temperature behavior.The two types of glasses were characterized by X-ray diffraction,SEM and chemical element analysis.The zirconium incorporated into structure plays a major role on the thermal stability of SiOC by hindering carbothermal reductions.It can be found that introducing zirconium into structure should be an effective way to enhance the thermal stability of SiOC glasses.