Porous silica aerogel/honeycomb ceramic composites fabricated by an ultrasound stimulation process

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• 作者：Sun-Wook Hong (1)
  In-Hyuck Song (1) sih1654@kims.re.kr
  Young-Jo Park (1)
  Hui-suk Yun (1)
  Ki-Young Hwang (2)
  Young-Woo Rhee (3)
• 关键词：Key words aerogel – ; ceramics – ; porous materials – ; composites – ; surface modification
• 刊名：Metals and Materials International
• 出版年：2012
• 出版时间：June 2012
• 年：2012
• 卷：18
• 期：3
• 页码：481-486
• 全文大小：1,010.5 KB
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• 作者单位：1. Engineering Ceramics Group, Korea Institute of Materials Science, Changwon, Gyeongnam, 641-831 Korea2. Agency for Defense Development, Daejon, 305-600 Korea3. Graduate School of Green Energy Technology, Chungnam National University, Daejon, 305-764 Korea
• ISSN：2005-4149

文摘

The synthesis behavior of nanoporous hydrophobic silica aerogel in honeycomb-type ceramics was observed using TEOS and MTES. Silica aerogel in the honeycomb ceramic structure was synthesized under ultrasound stimulation. The synthesized aerogel/honeycomb ceramic composites were dried under supercritical CO₂ drying conditions. The values for the line shrinkage of the wet gels during supercritical CO₂ drying declined from 19% to 4% with an increase in the H₂O/TEOS molar ratio from 8 to 24. Low shrinkage was a key factor in increasing the interface compatibility with the aerogel/honeycomb ceramic composites. The optimum condition of silica aerogel in the honeycomb-type ceramic structure had a TEOS:MTES: H₂O:glycerol ratio equal to 1:1.2:24:0.05 (mol%).