遮光剂球形颗粒分散系红外热透过率研究  

Study on Thermal Infrared Transmittance of Spherical Particle Dispersion Series with Opacifier

作　　者：凌俐[1] 毕岗[1] 黄敏[1] 丁金婷[1] 陈国宏[1] 

机构地区：[1]浙江大学城市学院信息与电气工程学院,杭州310015

出　　处：《材料导报》2013年第24期136-139,143,共5页Materials Reports

基　　金：国家自然科学基金(61275108);浙江大学城市学院教师科研基金(J-13007);杭州市重点学科建设项目

摘　　要：根据气凝胶遮光剂复合材料的微观结构特性,首次提出用多体散射理论计算其遮光剂球形颗粒分散体系的红外热透过率。通过分析小角度近似和多次散射因子对比尔-朗伯定律中散射传递函数的影响,建立了气凝胶遮光剂复合材料前向散射透过率的计算方法,编写计算程序,对SiO2气凝胶中遮光剂为SiC和ZrO2的两种材料进行了计算。计算结果表明:在实验允许的范围内,遮光剂质量分数越大、材料厚度越大,复合材料隔热效果越好;在遮光剂质量分数和材料厚度一定的情况下,由于复折射率的影响,不同的遮光剂材料有不同的最佳制备半径,SiC和ZrO2遮光剂球形颗粒的最佳制备半径分别为1.2μm和0.7μm。Based on the microstructure properties of aerogel opaci-fier composite insulating materials, the mul- tiple-scattering theory was proposed to calculate the thermal infrared transmittance of the disperse system of the opaci- fier spherical particles. By analyzing the influence of small-angle approximation and multiple scattering factors on the transfer functions of the scattering in Beer-Lambert law, the computing methods of aerogel forward scattering trans- mittance was established, the calculation procedures were programmed. Besides, the calculation was conducted to- wards the opacifiers with the composite materials of SiC and ZrO2 in the SiO2 aerogel. The calculation results showed that within the permitted range of the experiment, the larger the mass percent of the opacifier and the thicker the ma- terials, the better the heat insulation effect of the composite materials will be; in the situation that the mass percentage of the opaci-fier and the thickness of the materials are fixed, due to the influence of the complex index of refraction, different opacifier materials has own different best radius. The best radius of the spherical particles of SiC and ZrO2 opacifier was t. 2 tam and 0.7 gm respectively.

关 键 词：气凝胶 遮光剂 多体散射理论 红外热透过率 

分 类 号：TB383[一般工业技术—材料科学与工程] TN213[电子电信—物理电子学]