Preparation and characterization of three-dimensionally ordered SiC hollow spheres

作者：Wang Hao^*; Li Xiao Dong; Xiao Jia Yu; Kim Dong Pyo

来源：Chemical Journal of Chinese Universities, 2006, 27(6): 1007-1011.

• three-dimensionally ordered material
• hollow sphere
• preceramic polymer conversion technique
• SiC ceramic

Three-dimensionally long range ordered SiC hollow spheres were prepared for the first time by infiltrating polymethylsilane(PMS) into three-dimensionally ordered sacrificial porous carbon templates produced from the ordered silica spheres as the original templates, curing and pyrolysis of PMS, and the removal of the porous carbon templates. It was found that the outer diameter (135-896 nm), the wall thickness (14-79 nm), BET specific surface area (50.8-5.0 m(2)/g) and micropore volume (0.265-0.038 cm(2)/g) of the achieved SIC hollow spheres can be tailored by utilizing carbon templates with different pore sizes or PMS solutions with different concentrations. In addition, the produced SiC hollow spheres were packed as a hcp structure to be a long range ordered assembly.

• 出版日期2006-6
• 单位中国人民解放军国防科学技术大学