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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 was synthesized by glycine-nitrate method (GNP). The formation process, crystal structure, particle size distribution and microstructure were characterized and analyzed by TG-DTA, XRD, particle size analyzer, BET and TEM. The results show that glycine can be used as fuel and complexing agent to form perovskite phase at low stoichiometry. The D50 of powder is 4.932μm by particle size analysis. The BET The surface area is 12.32 m2 / g, and the dBET value of the powder is 74.6 nm. The TEM observation shows that the primary particle size of the powder is 50 nm and the shape of the particles is regular.