Novel nanoporous silica aerogel impregnated highly porous ceramics with low thermal conductivity and enhanced mechanical properties
Novel nanoporous silica aerogel impregnated highly porous ceramics with low thermal conductivity and enhanced mechanical properties
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新型纳米多孔二氧化硅气凝胶浸渍高孔陶瓷，具有低导热率和增强的机械性能
DOI：
10.1016/j.scriptamat.2012.12.015
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发表时间：
2013-04-01
影响因子：
6
通讯作者：
Du, Jian-Cong
中科院分区：
文献类型：
--
作者：
Hong, Chang-Qing;Han, Jie-Cai;Du, Jian-Cong
以硅胶和莰烯基冻铸多孔氧化锆陶瓷为原料，成功地合成了一种浸渍高多孔氧化锆陶瓷的新型纳米多孔二氧化硅气凝胶。所得多孔陶瓷气凝胶复合材料的抗压强度为36.8 MPa，导热系数为0.041 ~ 0.098 W m(-1) K-1，孔隙率从46.5%增加到69.8%。本研究为制备超低导热系数的高强绝热材料提供了一条有效途径。(c) 2012材料学报Elsevier Ltd.出版。版权所有。
Novel nanoporous silica aerogel impregnated highly porous zirconia ceramics were successfully synthesized from silica gel and camphene-based freeze-cast porous zirconia ceramics. The resultant porous ceramic aerogel composites exhibited high compressive strength of 36.8 MPa, and ultra-low thermal conductivity ranging from 0.041 to 0.098 W m(-1) K-1, as the porosity increased from 46.5% to 69.8%. The present work provides an efficient way to fabricate high-strength thermal insulation materials with ultra-low thermal conductivity. (c) 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.