Synthesis of thermally stable porous SiC hollow spheres and control of the shell thickness

Title
Synthesis of thermally stable porous SiC hollow spheres and control of the shell thickness
Authors
노성철이승용김성례윤성호설용건정광덕
Keywords
SiC; hollow sphere; Thickness control; Silicon carbide; SiO2 template; Control thickness
Issue Date
2014-11
Publisher
Microporous and mesoporous materials
Citation
VOL 199, 11-17
Abstract
Thermally stable SiC hollow spheres were prepared using SiO2 templates with two layers. At the calcination at higher than 1300 °C, the SiC hollow sphere could be obtained. The shell thickness of the porous SiC hollow spheres can be controlled by the molar ratio of TMS/TEOS. The pore volumes and BET surface areas of the template SiO2 increased with the molar ratio of TMS/TEOS, while those of the SiC/SiO2 and SiC spheres decreased. It is evident that the pore sizes of the SiC hollow spheres were not influenced by the TMS/TEOS ratio. The wall thickness of the SiC sample increased with an increase in the TMS/TEOS mole ratio. The prepared SiC hollow spheres with the surface area higher than 770 m2/g were thermally stable up to temperatures higher than 700 °C.
URI
http://pubs.kist.re.kr/handle/201004/48472
ISSN
13871811
Appears in Collections:
KIST Publication > Article
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