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首页> 外文期刊>Journal of Materials Science and Chemical Engineering >Effect of the Cation Size Disorder at the A-Site on the Structural Properties of SrAFeTiO6 Double Perovskites (A = La, Pr or Nd)
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Effect of the Cation Size Disorder at the A-Site on the Structural Properties of SrAFeTiO6 Double Perovskites (A = La, Pr or Nd)

机译：A部位阳离子尺寸失调对SrAFeTiO6双重钙钛矿（A = La，Pr或Nd）的结构性能的影响

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摘要

In this paper, the cation size disorder effect of the A-site on the structural properties of the SrAFe- TiO6 (A = La, Pr or Nd) was investigated. The compounds were synthesized—as the best of our knowledge—for the first time by conventional and precursor method to get crystalline materials. The results obtained from the experimental measurements carried out on new double perovskite materials were presented. The data of X-ray diffraction (XRD), Fourier Transform Infra Red FTIR were measured at room temperature. From the X-ray diffraction, and by means of standard Rietiveld method, all the samples have the same structure (orthorhombic) with Pnma space group. The difference in the tolerance factor is clearly noticed and refers to the cation size disorder at the A-sites. The Fourier Transform Infra Red FTIR measurement has been done; the results of it confirm the double perovskite structure and the difference between the samples were noticed. The tolerance factors for the samples altered from SrLaFeTiO6 up to SrNdFeTiO6 and this difference return to ionic radius and cation size effect.
机译：在本文中，研究了A位的阳离子尺寸紊乱对SrAFe-TiO6（A = La，Pr或Nd）的结构性能的影响。据我们所知，这些化合物是首次通过常规方法和前体方法合成得到结晶材料。介绍了从对新型钙钛矿材料进行的实验测量获得的结果。在室温下测量X射线衍射（XRD），傅立叶变换红外FTIR的数据。通过X射线衍射，并通过标准Rietiveld方法，所有样品都具有与Pnma空间群相同的结构（斜方晶）。容忍因子的差异很明显，涉及到A部位的阳离子大小紊乱。傅里叶变换红外FTIR测量已经完成;结果证实了钙钛矿的双重结构，并注意到了样品之间的差异。样品的耐受因子从SrLaFeTiO6到SrNdFeTiO6有所变化，并且这种差异返回到离子半径和阳离子尺寸效应。

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