SOME THERMAL AND OPTICAL-PROPERTIES OF A NEW TRANSPARENT SILICA XEROGEL MATERIAL WITH LOW-DENSITY

被引：23

作者：

EINARSRUD, MA ^{[1
]}

HAEREID, S ^{[1
]}

WITTWER, V ^{[1
]}

机构：

[1] FRAUNHOFER INST SOLAR ENERGY SYST,W-7800 FREIBURG,GERMANY

来源：

SOLAR ENERGY MATERIALS AND SOLAR CELLS | 1993年 / 31卷 / 03期

关键词：

D O I：

10.1016/0927-0248(93)90128-P

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

In this work we have studied a new type of monolithic silica aerogels (xerogels) made without supercritical drying. The xerogels are produced by performing washing and ageing treatments on the alcogel before drying at ambient pressure. Densities as low as 0.26 g/cm3 have so far been obtained and the thermal conductivity of air-filled xerogels has been measured down to 18 mW/mK. Properties of this new type of silica xerogels have been compared to the properties of silica aerogel made by supercritical drying. Density, pore size, thermal conductivity and optical transmittance are reported, and some application advantages are discussed.

引用

页码：341 / 347

页数：7

共 11 条

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