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Abstract:
采用溶胶凝胶法,以蔗糖和正硅酸乙酯(TEOS)为原料,草酸为TEOS水解的催化剂,制备均相碳化硅前驱体,在氩气氛和高温条件下(1350-1600℃)将碳化硅先驱体进行碳热还原,制备出高比表面积的SiC。考察了水/TEOS物质的量的比、碳/硅物质的量的比及镍盐等因素对碳化硅比表面积的影响。结果表明,当nwater/nTEOS=7.5,nC/nSi=4时,适宜的镍催化剂(nNi/TEOS=0.005),凝胶形成的时间最短,镍盐的加入可使碳热还原温度降低200℃。
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无机化学学报
ISSN: 1001-4861
Year: 2006
Issue: 10
Volume: 22
Page: 1778-1782
0 . 5 8 3
JCR@2006
0 . 8 0 0
JCR@2023
JCR Journal Grade:4
Cited Count:
WoS CC Cited Count: 0
SCOPUS Cited Count:
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count: -1
30 Days PV: 11
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