利用高能振动球磨法,以氧化镧、氧化钙和二氧化锰为原料,制备出纳米氧化物粉体La0.8Ca0.2MnO3.采用XRD分析了球磨过程中粉体的晶化过程;以TEM观察了制备出的粉体的颗粒尺寸和分散状况.结果表明,采用高能振动球磨法20 h就能制备出颗粒尺寸在50~100 nm,属正交晶系的纳米钙钛矿粉体La0.8Ca0.2MnO3;在该反应体系的球磨过程中,产物晶粒经历了先长大后细化的过程.将球磨法制备出的粉体压成电极,进行放电分析.结果表明采用该方法制备出的纳米La0.8Ca0.2MnO3粉体具有很好的电催化活性.
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