高温合成锰酸锶镧的缺陷

Bug of Synthesizing La_(0.8)Sr_(0.2)MnO_3 at High Temperature

严格按照化学式拟定配方,采用固相合成方法合成的锰酸锶镧材料中含有杂相La2O3。借助XRD,DSC,TG等分析手段分析了高温合成锰酸锶镧的缺陷,尝试对锰酸锶镧进行高温再处理,结果获得的纯锰酸锶镧不含La2O3杂相。

The directions of producing chemicals according to molecular formula were studied and La0.8Sr0.2MnO3 at high temperature was synthesized.The results show that the powder of La0.8Sr0.2MnO3 have mixed appearance of La2O3.The bug of the synthesis process by dint of XRD,DSC,TG,etc.The result show that the pure La0.8Sr0.2MnO3 do not have mixed appearance of La2O3 by aftertreatment at high temperature.