Synthesis and NMR investigation of 2D nanocrystals of the LaF3 doped by SrF2
Synthesis and NMR investigation of 2D nanocrystals of the LaF3 doped by SrF2
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DOI：
10.1016/j.jfluchem.2016.07.006
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发表时间：
2016-08
影响因子：
1.9
通讯作者：
L. Gulina;M. Schäfer;A. Privalov;V. Tolstoy;I. Murin;M. Vogel
中科院分区：
文献类型：
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作者：
L. Gulina;M. Schäfer;A. Privalov;V. Tolstoy;I. Murin;M. Vogel
首次采用液-气界面合成法制备了SrF 2掺杂LaF 3的纳米结构超离子导体。采用SEM、FT-IR、XRD和XRD对产物进行了组成分析。它由聚集在微管中的纳米片组成。SrF 2的含量在2mol%至16mol%之间变化。XRD分析表明，该晶体结构在1000 K时仍保持不变。NMR扩散法已经显示出扩散系数的显著增强，其比未掺杂的纳米级LaF 3高至少一个数量级，并且在800 K左右的温度下比块状LaF 3高约3个数量级。
Nanostructured superionic conductor LaF3doped by SrF2is obtained in the first time using the synthesis at the solution–gas interface. The product composition La1-xSrxF3-x(0< x≤0.16) was analyzed using SEM, FT-IR, XRD and EPM. It consists of nanosheets aggregated in microtubes. The SrF2content is varied from 2 mol% to 16 mol%. XRD analysis indicates tysonite crystal structure, which is still preserved up to 1000 K. NMR diffusometry has shown a significant enhancement of the diffusion coefficient, which is at least one order of magnitude higher than for undoped nanosized LaF3and about 3 orders of magnitude higher than for bulk LaF3at temperatures around 800 K.