Journal of the Korean Crystal Growth and Crystal Technology (한국결정성장학회지)

The Korea Association of Crystal Growth (한국결정성장학회)
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Influence of calcination temperature on the structure of freeze-dried silica gel

동결건조 실리카 젤의 구조에 미치는 하소온도의 영향

  • 최성준 (부산대학교 재료공학부) ;
  • 박상희 (가야대학교 세라믹공학과) ;
  • 박홍채 (부산대학교 재료공학부)
  • Published : 2003.04.01
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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.

Tetraethyl orthosilicate (TEOS)로부터 유도된 동결건조 실리카 젤의 기공구조에 미치는 하소온도의 영향이 질소 등온흡착 및 수은압입법에 의하여 조사되었다. 동결건조물은 다소간의 마이크로기공을 함유하고 있었으나 주로 4~6nm 크기의 매크로기공 및 7~20$\mu\textrm{m}$ 크기의 매크로기공으로 구성되어 있었다. 하소온도의 증가에 따른 기공구조변화는 치밀화 정도에 의존하였다.

Keywords

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