热致变色可变发射率材料的制备与辐射特性研究

PREPARED METHOD AND RADIATIVE PROPERTIES OF A THERMOCHROMIC VARIABLE EMITTANCE MATERIAL

采用固相反应法制备了钙钛矿型锰氧化物热致变色材料,机械加工制得了薄层样品,测量了样品的晶体结构、居里温度以及辐射特性,分析了材料组分对样品居里温度和辐射特性的影响。试验结果表明,热致变色材料的发射率在相转变温度点附近会随温度的变化而突变。

This paper introduces the prepared method of a thermochromic variable emittance radiator based on perovskite manganese oxide. A series of high rigidity block perovskite manganese oxide samples were prepared using solid-state reaction. The crystalloid structure, Curie-temperature and radiative properties of the samples were measured. The effects of the reacting component proportions and preparation techniques on the Curie temperature and radiative properties of the samples are discussed. The measured results show that the emittance of the thermochromic materials abruptly changes depending on its temperature around the transition temperature.