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科学通报  2011 

三维有序大孔钙钛矿材料的制备

, PP. 1386-1391

Keywords: 聚苯乙烯微球,胶晶模板法,3DOM,钙钛矿型材料,热致变色材料

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Abstract:

以制备三维有序大孔(3DOM)La0.8Sr0.2MnO3和La0.7Ca0.2Sr0.1MnO3钙钛矿材料为例,研究3DOM钙钛矿热致变色材料的制备方法.采用自组装方法将粒径约为220nm的聚苯乙烯(PS)微球组装成三维有序排列的胶体晶体模板,以La(NO3)3·6H2O,Ca(NO3)2·4H2O,Sr(NO3)2,Mn(CH3COO)2·4H2O、乙醇等配制的混合金属硝酸盐溶液为前驱填充于PS胶晶模板间隙中,经干燥和煅烧除去微球模板后得到三维有序大孔(3DOM)La0.8Sr0.2MnO3和La0.7Ca0.2Sr0.1MnO3材料.结果表明,由于填充次数不同,得到3DOM材料的骨架厚度不同,其孔径收缩率也相差较大.同时,由于制备方法不同,3DOM和块体La0.8Sr0.2MnO3材料的居里温度也相差较大.

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