热科学学报（英文版）2005，Vol.14Issue(3)：281-283,253,4.
Thermal Radiative Properties of Xonotlite Insulation Material
Thermal Radiative Properties of Xonotlite Insulation Material
摘要
Abstract
This paper presents experimental results of thermal radiative properties of xonotlite-type calcium silicate insulation material. Transmittance spectra were first taken using Fourier transform infrared spectrometer (FTIR)for the samples with ρ = 234 kg/m3. Specific extinction coefficient spectra were then obtained by applying Beer's law.Finally,by using the diffusion approximation,the specific Rossland mean extinction coefficients and radiative thermal conductivities were obtained for various temperatures. The results show that the specific spectral extinction coefficient of xonotlite is larger than 7 m2/kg in the whole measured spectra, and diffusion approximation equation is a reasonable description of radiative heat transfer in xonotlite insulation material. The specific Rossland mean extinction coefficient of xonotlite has a maximum ualue at 400 K and the radiative thermal conductivity is almost proportional to the cube of temperature.关键词
xonotlite/insulation/radiative properties/extinction coefficientKey words
xonotlite/insulation/radiative properties/extinction coefficient分类
能源科技引用本文复制引用
Xinxin ZHANG,Gaosheng WEI,Fan YU..Thermal Radiative Properties of Xonotlite Insulation Material[J].热科学学报（英文版）,2005,14(3):281-283,253,4.基金项目
This research was financially supported by the National Natural Science Foundation of China (No.50276003) （No.50276003）
