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热致变色LSMO光栅结构表面的热辐射特性研究

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摘要 本文旨在研究具有一维光栅结构表面的热致变色材料La0.825Sr0.175MnO3(LSMO)的热辐射光谱特性及其随结构和温度变化的规律.首先利用K-K关系得到LSMO在不同温度下的介电常数,然后利用时域有限差分方法分析计算对应不同参数的结构表面光谱发射率.研究发现,由于光栅结构激发的微腔谐振效应,LSMO结构表面的光谱发射率呈现出选择性增强的特征.光谱发射率随结构参数的变化情况表明,通过合理选择光栅的结构参数可以得到想要的辐射增强特性.平均发射率随温度的变化表明,相比于光滑表面的LSMO而言,具有光栅结构表面的LSMO的表面发射率有了比较明显的增强,另外热致变色特性有了明显的改善.
出处 《中国科学:技术科学》 EI CSCD 北大核心 2011年第1期129-134,共6页 Scientia Sinica(Technologica)
基金 国家自然科学基金(批准号:50936002 50876044)资助项目
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