摘要
以碳酸钠为沉淀剂,采用共沉淀法制备了亚微米级LaNi0.6Fe0.4O3(以下简称LNFO)粉体。研究了溶液离子总浓度,沉淀剂溶液pH,沉淀反应温度,滴定速率,前驱体热处理温度以及分散剂等因素对制备LNFO粉体的影响。采用X射线衍射分析(XRD)、差热失重分析(DSC-TG)、扫描电镜(SEM)对样品结构和形貌进行了表征。结果表明:前期混合液离子总浓度为0.4 mol/L,沉淀剂溶液pH为10,沉淀温度范围为60～80℃,滴定速率为30 mL/min,以CTAB为分散剂,所得前驱体在700℃煅烧2 h后可得结晶程度良好的LNFO粉体。
The LaNi0.6Fe0.4O3 （LNFO） powder was synthesized by co-precipitation method using Na2 CO3 solution as the co-precipitation agent. The effects of concentration of the solution, pH value of precipitant solution, precipitation temperature, titration rate, heat treatment temperature and dispersing agent on the preparation of LaNi0.6Fe0.4O3 were investigated. The calcining process was characterized by Differential scanning caborimetry analysis（DSC） and thermogravimetric analysis （TG）. The powder properties were characterized by XRD and SEM. At the precipitant pH value of 10, a mixed solution concentration of 0. 4 mol/L, a precipitation temperature among 60-80 ℃, a titration rate of 30 mL/min and a roasting temperature of 700 ℃, using CATB as dispersing agent, ultrafine LaNi0.6Fe0.4O3 powders could be prepared with pervoskite structure.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2013年第3期423-427,共5页
Journal of Synthetic Crystals
基金
国家自然科学基金(51072109)
陕西科技大学研究生创新基金项目资助
