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 mat