Synthesis, crystal structure and ionic conductivity of the Ba3Mo1-xWxNbO8.5 solid solution

被引：13

作者：

Bernasconi, Andrea ^{[1
]}

Tealdi, Cristina ^{[1
]}

Muehlbauer, Martin ^{[2
,3
,4
]}

Malavasi, Lorenzo ^{[1
]}

机构：

[1] Univ Pavia, Dept Chem, Pavia, Italy

[2] IAM, Karlsruhe, Germany

[3] KIT, Inst Technol, Eggenstein Leopoldshafen, Germany

[4] Tech Univ Munich, Heinz Maier Leibnitz Zentrum MLZ, Garching, Germany

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2018年 / 258卷

关键词：

Ionic conductor; X-ray and Neutron diffraction; Synthesis;

D O I：

10.1016/j.jssc.2017.11.030

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Ba3MoNbO8.5 compound has been recently discovered as novel oxide ionic conductor with a structure that is a hybrid between 9R hexagonal perovskite and palmierite. In this work, the full substitution of Mo with W has been demonstrated as possible, without altering significantly the conductivity of the material. The crystal structure of the Ba3Mo1-xWxNbO8.5 solid solution (with x equals 0, 0.25, 0.5, 0.75 and 1) has been investigated by X-ray powder diffraction, showing a reduction of the unit cell by increasing the molybdenum content, despite the larger size of tungsten compared to molybdenum. Neutron powder diffraction measurements have been performed, indicating different levels of contribution of 9R polytype and of palmierite to the hybrid structure of the material as a function of the W-content.

引用

页码：628 / 633

页数：6

共 18 条

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