甘氨酸-硝酸盐法合成阴极粉体La_(0.8)Sr_(0.2)MnO_3研究

Study on Cathode Powder La_(0.8)Sr_(0.2)MnO_3 Prepared by Glycine-Nitrate Process

采用甘氨酸-硝酸盐法(GNP)合成了阴极粉体La0.8Sr0.2MnO3。用TG-DTA、XRD、粒度分析仪、BET、TEM等对产物形成过程、晶体结构、粒度分布和微观结构进行了分析和表征。结果表明:甘氨酸同时作为燃料和络合剂,能在低温下形成符合规定化学计量配比的钙钛矿晶相;由粒度分析得出粉体D50为4.932μm;由BET测量得出粉体比表面积为12.32 m2/g,粉体的dBET值为74.6 nm;由TEM观察可知粉体的一次粒子大小为50 nm,粒子形状较规则。

Cathode powder La0.8Sr0.2MnO3 were synthesized by glycine-nitrate process(GNP).The formation process,crystal structure,granularity distribution and microstructure of the sample were characterized by TG-DTA,XRD,granularity analyze instrument,BET and TEM.The results revealed that a single perovskite phase can be formed at low temperature due to glycine was used as both fuel and homogeneous agent;D50 of the powder was 4.932 μm,the specific area of powder was 12.32 m2/g,its dBET was 74.6 nm;TEM showed that the grain size was 50 nm and its shape was much more regular.