摘要
采用固相反应法制备了相变温度接近室温的热致变色材料,研究了不同掺杂元素和掺杂浓度对热致变色材料辐射和光学特性的影响,并利用K-K分析模型导出了热致变色材料的光学常数。结果表明:热致变色材料LCSMO和LSMO(x=0.175)的发射率在相变温度附近出现剧烈变化,并且光常数在很大的频域范围内可自主调制。
The thermochromatic materials, of which phase transition temperature is near room temperature, are prepared by standard solid state reaction method. The influences of component fraction and doping element on the radiative and optical properties of the materials are studied. Based on the spectral reflectivity data of the materials, the optical constants are obtained through the Kramers-Kroning analysis. The result shows that the emissivity of the materials （La0.7Ca0.2Sr0.1MnO3 and La0.825Sr0.175MnO3） present a sudden transition around the phase transition temperature, and the optical constants can be also adjusted by the change of doping level.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2011年第8期1349-1352,共4页
Journal of Engineering Thermophysics
基金
国家自然科学基金资助项目(No.50936002
No.50876044)
关键词
可变发射率
吸收率
光谱反射率
K—K分析
锰氧化物
variable emissivity
absorptivity
spectral reflectivity
Kramers-Kroning analysis
manganese oxide
