熔盐法和柠檬酸盐法对LSCF烧结活性的影响

分别采用熔盐法和柠檬酸盐法制备了组成为La_(0.6)Sr_(0.3)Co_(0.3)Fe_(0.7)O_(3-δ)的固体氧化物燃料电池(SOFC)阴极粉体材料,对比了二者的烧结活性,并对粉体粒度分布和表面活性进行了表征。结果发现柠檬酸盐法合成的粉体具有更高的烧结活性。粒度分析实验表明柠檬酸盐法合成粉体的一次颗粒尺寸比熔盐法大约小了一个数量级;吸附性能实验表明柠檬酸盐法合成的粉体具有更强的吸附能力。较小的颗粒尺寸和较高的粉体表面能使得柠檬酸盐法合成的粉体具有更高的烧结活性。

Influence of molten salts and citrates synthesis methods on sinterability of LSCF

The sinterability of LSCF-6337 (La0.6Sr0.3Co0.3Fe0.7O3-δ) cathode powder prepared by molten salts and citrates method was investigated.The results indicate that the powder prepared by citrates method presents better sinterablity.In order to find the reason of sinterability difference,the particle size distribution and the adsorption capability of powder were measured,and the results indicate that the primary particle size of powder prepared by citrates method is almost one magnitude order lower than that synthesized by molten salts and the adsorption ability of the former is also higher than the latter.The lesser particle size and huge surface tension make the powder prepared by citrates method have better sinterablity.