球磨工艺对Ce_(0.8)Sm_(0.2)O_(1.9)电解质粒度的影响

Effect of Milling Process on Ce_(0.8)Sm_(0.2)O_(1.9) ElectrolyteParticle Size

通过固相反应法来合成固体氧化物燃料电池Ce_(0.8)Sm_(0.2)O_(1.9)电解质粉末,即以CeO_2和Sm_2O_3为原料,通过球磨(不同的球磨转速和球磨时间)、干燥、过筛得到混合粉末。通过粒径分布的分析,得出最佳球磨工艺(球磨转速和球磨时间)。将最佳球磨工艺得到的粉末在1200℃煅烧2h并通过X射线衍射对其晶体结构进行表征。实验得出,最佳的球磨转速为400r/min,球磨时间是16h,其对应的中位径D_(50)约为8.036μm。经过1200℃,2h的煅烧形成了单相立方萤石结构的Ce_(0.8)Sm_(0.2)O_(1.9)粉末。

The solid oxide fuel cell Ce0.8Sm0.2O1.9 electrolyte powder is acquired through the solid-state reaction with CeO2 and Sm203 as raw materials mixing together for ball-milling （different milling speed and milling time）, duing, and screening. The optimal milling process （milling speed and milling time） is obtained by identifying the particle size distribution. The powder which obtained from the optimal milling process is calcined at 1200℃ for 2h, and with its crystal structure analyzed by X-ray diffractometer. The experimental results show that the optimal milling speed is 400r/min and milling time 16h, which its corresponding medium diameter D50 is about 8.036μm. Then, the single-phase cubic fluorite structural Ce0.8Sm0.2O1.9 electrolyte powder is formed after the calcination at 1200℃ for 2h.