Enhanced ionic conductivity of aluminum tungstate by crystallographic orientation in a strong magnetic field
Enhanced ionic conductivity of aluminum tungstate by crystallographic orientation in a strong magnetic field
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DOI：
10.1111/jace.18001
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发表时间：
2021-07
影响因子：
3.9
通讯作者：
Cem E. Özbilgin;Kiyoshi Kobayashi;S. Tamura;N. Imanaka;Tohru S. Suzuki
中科院分区：
文献类型：
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作者：
Cem E. Özbilgin;Kiyoshi Kobayashi;S. Tamura;N. Imanaka;Tohru S. Suzuki
多电荷离子而不是单电荷离子的离子传导对于能量存储和传感器应用是有益的。多电荷离子的低迁移率是实现这些应用的一个重要障碍。化学方法，如掺杂和固溶体形成，已被用来提高离子电导率。然而，陶瓷电解质的表观性能可以通过各向异性晶粒的晶体学取向来改善。在这项研究中，晶体取向的钨酸铝陶瓷在强磁场中通过注浆成型加工。利用该技术可以制备b轴和c轴取向的钨酸铝陶瓷。晶粒沿着b轴取向可以使离子电导率比随机取向样品提高至少1.77倍，比c轴取向样品提高至少2.13倍。这项研究的结果表明，这种方法可以使用多晶加工而不是困难的单晶合成技术来提高各向异性材料的离子电导率。
The ionic conduction of multiply charged ions, rather than singly charged ions, is beneficial for energy storage and sensor applications. The low mobility of multiply charged ions is one important obstacle to the implementation of these applications. Chemical methods, such as doping and solid solution formation, have been used to improve ionic conductivity. However, the apparent performance of ceramic electrolytes can be improved by the crystallographic alignment of anisotropic grains. In this study, crystal‐oriented aluminum tungstate ceramics were processed by slip casting in a strong magnetic field. Theb‐axis‐ andc‐axis‐oriented aluminum tungstate ceramics can be produced by this technique. The orientation of grains along theb‐axis could enhance ionic conductivity by at least 1.77 times compared to that of a randomly oriented sample and 2.13 times compared to that of thec‐axis‐oriented sample. The results of this study suggest that this method can improve the ionic conductivity of an anisotropic material using polycrystalline processing instead of difficult single‐crystal synthesis techniques.