Preparation and Characterization of Threedimensionally Ordered SiC Hollow Spheres

Chem. J. Chinese Universities

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Preparation and Characterization of Threedimensionally Ordered SiC Hollow Spheres

WANG Hao¹*, LI Xiao-Dong¹, XIAO Jia-Yu¹, KIM Dong-Pyo²

1. CFC Key Lab of National University of Defense Technology, Changsha, China, 410073;
2. Department of Fine Chemical Engineering and Chemistry, Chungnam National University, Taejon, 305-764 South Korea

Received:2005-06-27 Revised:1900-01-01 Online:2006-06-10 Published:2006-06-10
Contact: WANG Hao

Abstract

Abstract: 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 m²/g) and micropore volume(0.265-0.038 cm³/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.

Key words: Three-dimensionally ordered material, Hollow sphere, Preceramic polymer conversion technique, SiC ceramic

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WANG Hao¹*, LI Xiao-Dong¹, XIAO Jia-Yu¹, KIM Dong-Pyo². Preparation and Characterization of Threedimensionally Ordered SiC Hollow Spheres[J]. Chem. J. Chinese Universities, doi: .

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Preparation and Characterization of Threedimensionally Ordered SiC Hollow Spheres

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