摘要
采用柠檬酸盐法制备了纯的LaSr3Fe3O10-δ粉体。利用间接碘量法测定了LaSr3Fe3O10-δ系列样品中铁离子的平均价态和氧的非化学计量值。实验发现,随着温度的逐渐升高,LaSr3Fe3O10-δ逐渐失氧,三价铁浓度增加使得铁的平均价态降低。
Pure LaSr3Fe3O10-δ was synthesised by citric acid method.The average valence of Fe and the oxygen nonstoichiometry of LaSr3Fe3O10-δ were studied by means of indirect iodometric titration.It has been found that the increase of oxygen nonstoichiometry δ with the temperature gives rise to the increase of Fe content,thus the decreasing the average valence of Fe.
出处
《南昌航空大学学报(自然科学版)》
CAS
2007年第3期84-89,共6页
Journal of Nanchang Hangkong University(Natural Sciences)
基金
江西省教育厅科技项目(赣技字[2006]55
[2006]313)