由非晶态分子合金制备纳米稀土复合氧化物La_(0.67-x)Nd_xSr_(0.33)MnO_3  

From molecular alloys to nanoparticles of La_(0.67-x)Nd_xSr_(0.33)MnO_3

作　　者：翟永青 易涛[2] 高松[2] 马宝清[2] 严纯华[2] 

机构地区：[1]河北大学化学系,河北保定071002 [2]北京大学稀土材料化学及应用国家重点实验室,北京100871

出　　处：《功能材料》2002年第3期256-257,共2页Journal of Functional Materials

基　　金：国家自然科学基金资助项目 (2 9771 0 0 1和 2 992 51 0 1 );北京大学方正集团资助项目

摘　　要：钙钛矿型稀土锰氧化物因其特殊的巨磁电阻效应 ,引起人们广泛的关注。本文用非晶态分子合金为前驱体 ,在低温下制备了La0 .67-xNdxSr0 .3 3 MnO3 的系列纳米复合氧化物。通过IR、TG DTA、XRD、AFM等对合成条件及纳米粒子的组成、结构、形貌。In recent year, mixed valance manganese perovskite shows remarkable interests in solid state physics and chemistry because of its special magneto transport properties and colossal magnetoresistance (CMR) effect. In this paper,a new route was reported to synthesize the nanosized La 0.67- x Nd x Sr 0.33 MnO 3 perovskite crystalline complex oxides at a rather lower calcination temperature upper than 500℃ using molecular alloys of La Nd Sr Mn DTPA as their precusors.The synthesise condition, shape and diameter of the particle of the nanosized complex oxides have been studied by IR, TG DTA, XRD, AFM.

关 键 词：非晶态分子合金 前驱体 钙钛矿型 纳米复合氧化物 

分 类 号：O614.33[理学—无机化学]