摘要
以硬脂酸、氧化镧、硝酸镍和硝酸铁为原料采用硬脂酸凝胶法合成了纯相LaNi0.6Fe0.4O3粉体为避免制备过程中产生杂相,实验采用了直接煅烧法即先将炉内温度升至煅烧温度保持恒温,然后将凝胶置于炉内焙烧。在650℃下成功合成了LaNi0.6Fe0.4O3粉体。用差示扫描量热法(DSC)和热重分析(TG)对其热处理过程进行分析,并用X射线衍射分析(XRD)和扫描电镜(SEM)对其结构和形貌进行表征。结果表明,合成的LaNi0.6Fe0.4O3粉体纯度高、分散性好,粒径<1μm,且工艺过程简单,具有较好应用前景。
LaNi0.6Fe0.4O3 cathode powders for solid oxide fuel cell was synthesized at 650℃ by stearic acid gel method using stearic acid, lanthanum oxide, nickel nitrate and ferric nitrate as raw materials. The direct calcination method was designed to efficiently avoid the formation of the impurities in the synthesis process. Differ- ential scanning caborimetry analysis （DSC） and thermogravimetric analysis （TG） were used to characterize the process of calcining. The powder properties were characterized by XRD and SEM. The as-prepared LaNi0.6Fe0.4O3 powders showed a better degree of crystallization and a high degree of purity after calcined at 650℃ for 2h. The size of particles with perovskite structure was in sub-micron and no large reunite in the powder.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2013年第19期2756-2758,2763,共4页
Journal of Functional Materials
基金
国家自然科学基金资助项目(51072109)
