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Structure and Property of Layered Perovskite Type Compounds (La,Sr)n+1 FenO3n+1 and Intercalation of LaSr3fesO10-δ,-.

机译:层状钙钛矿型化合物(La,Sr)n + 1 FenO3n + 1的结构和性质以及LaSr3fesO10-δ,-的嵌入。

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摘要

Layered perovskite compoounds, LaSrnO3n+1(n=1 and 3) and La2SrFe2O7, were prepred and characterized by powder X-ray diffeaction and thermal analysis. Wide oxygen non-stoichiometry was observed for triple layered perovskite, LaSr3feO10-δ. Oxygen-deficient sample, LaSr3fe3O9.2 exhibits a drastic elongation of the c-axis, from 2.83 to 3.61 mn, as water molecules were intercalated into the rock salt layer. TG-DTA measurement showed that hydrate LaSr3fe3O9.2. ZH2O converted to an intermediate phase, LaSr3fe3O9.2.H2O, at 60 deg C and then to LaSr3fe3O9.9, at 320 deg. C.
机译:制备层状钙钛矿化合物LaSrnO3n + 1(n = 1和3)和La2SrFe2O7,并通过粉末X射线衍射和热分析对其进行表征。观察到三层钙钛矿LaSr3feO10-δ的宽氧非化学计量关系。缺氧样品LaSr3fe3O9.2的c轴急剧伸长,从2.83到3.61 mn,这是因为水分子插入了盐岩层中。 TG-DTA测量显示为水合物LaSr3fe3O9.2。 ZH2O在60摄氏度时转换为中间相LaSr3fe3O9.2.H2O,然后在320摄氏度时转换为LaSr3fe3O9.9。 C。

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