La_(0.7)Sr_(0.3)CrO_3粉体粒度影响因素的研究

THE FACTORS AFFECTING ON THE PARTICLE SIZE OF THE La_(0.7)Sr_(0.3)CrO_3 POWDER

采用溶胶－ 凝胶法合成了Ｌａ１－ ｘＳｒｘＣｒＯ３ 粉体． 对于合成的Ｌａ０．７Ｓｒ０．３ＣｒＯ３ 粉体，着重从混合溶剂即柠檬酸与乙二醇的质量比和煅烧温度等方面，讨论了影响高温燃料电池联接材料粉体粒度的主要因素． 最终得出如下结论：柠檬酸与乙二醇的质量比为１∶１．２ ，煅烧温度为８００ ℃时粉体粒度相对最小，平均为３２ ｎｍ ．

The La 0.7 Sr 0.3 CrO 3 powder was prepared by the sol-gel route. The main factors affecting the particle size of powder are the mass ratio of citric acid and ethylene glycol of the mixed solvent , as well as the calcining temperature. The La 0.7 Sr 0.3 CrO 3 powder with the average particle size of 32 nm can be obtained by using the mixed solvent with the mass ratio of citric acid and ethylene glycol being 1∶1.2 and the calcining temperature being 800 ℃ .