ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Mesoporous silicon carbide with and without SiC filler was prepared from the pyrolysis ofpolycarbosilane (PCS), and the relationship between pyrolysis and properties of micro/meso pores wasinvestigated. The surface area of pyrolyzed PCS without filler significantly decreased from 268 to 0.5m2/g withincreasing pyrolysis temperature, and disappearance of the micropores was observed. In contrast, the pyrolyzedPCS with filler showed the retention of micro/mesopores, regardless of pyrolysis temperature. In addition, highsurface area ranging from 120 to 180m2/g and a bimodal pore distribution were observed in pyrolyzed PCS withfiller. FT-IR showed the decomposition of Si-H, Si-CH3 and Si-CH2-Si in the PCS network during pyrolysis,which led to the evolution of hydrogen and methane gas. However, the obtained pores might be larger than thesize of evolved gases. Thus, though micro/meso pores and large surface area were retained by the addition offiller, coalescence between pores could occur during pyrolysis
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/55/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.352.95.pdf
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