The optical properties of heat-insulating ceramics made of microballoons of aluminum oxide

被引：4
|
作者：
Moiseev, SS [1 ]
Petrov, VA [1 ]
Stepanov, SV [1 ]
机构：
[1] Sci Assoc, Inst High Temp, IVTAN, Inst High Energy Dens, Moscow 127412, Russia
来源：
HIGH TEMPERATURE | 2004年 / 42卷 / 01期
关键词：
effective absorption coefficient; radiation diffusion coefficient; experimental investigation;
D O I：
10.1023/B:HITE.0000020102.45041.b6
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The effective absorption coefficient and the radiation t-diffusion coefficient are determined for 3 3 two types of ceramics made of aluminum oxide microballoons with densities of 440 kg/m(3) and 1100 kg/m(3) The method is based on the experimental investigation of the normal hemispherical transmissivity of cylindrical samples of different thickness and the angular dependence of the directional hemispherical transmissivity of one of the samples for wavelengths of 0.63, 1.15, and 3.39 mum. The dependence of the bihemispherical reflectivity of a flat layer on its thickness is calculated from the data obtained.
引用
收藏
页码：139 / 145
页数：7
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