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Influence of calcination temperature on the structure of freeze-dried silica gel  

최성준 (부산대학교 재료공학부)
박상희 (가야대학교 세라믹공학과)
박홍채 (부산대학교 재료공학부)
Publication Information
Journal of the Korean Crystal Growth and Crystal Technology / v.13, no.2, 2003 , pp. 73-78 More about this Journal
Abstract
The influence of calcination temperature on the pore structure of freeze dried silica gel derived from tetraethyl orthosilicate (TEOS) was investigated using $N_2$adsorption and mercury intrusion techniques. Freeze dried material contained not only 4-6 nm sized mesopores and 6-10 $\mu\textrm{m}$ sized macropores, but minor micropores. The change of pore structure due to the increase of calcination temperature was dependant upon the degree of densification.
Keywords
Freeze-dried silica gel; Pore structure; Calcination temperature; Tetraethyl orthosilicate (TEOS); Micropores; Mesopores; Macropores; Nitrogen adsorption; Mercury intrusion;
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