摘要
氧化物气凝胶是一种三维纳米多孔材料,具有高孔隙率、高比表面积、低热导率及高熔点等优点,表现出了优异的耐高温以及隔热性能.本文综述了氧化硅、氧化铝、氧化锆气凝胶、二元和多元耐高温隔热氧化物气凝胶及其复合气凝胶的研究进展,总结了氧化物气凝胶的制备方法和性能,提出了其中存在的问题,并对氧化物气凝胶在耐高温隔热领域的应用进行了展望.
Abstract
Oxide aerogel is one type of three-dimensional nano porous material,which has the advantages of high porosity,high specific surface area,low thermal conductivity,high melting point and so on.Moreover,oxide aerogel always shows excellent high-temperature resistance and thermal insulation performance.Thus,in this paper,the research progress of heat-resistant oxide aerogels including silica,alumina,zirconia aerogels,binary and multi-component and their composite counterparts are reviewed.The preparation method and performance of oxide aerogels are summarized,the existing problems are pointed out,and the application of oxide aerogels in the field of high temperature thermal insulation is prospected.
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