Control of oxygen vacancies and their kinetic behaviours via reversible oxygen loss in BiFeO3 ceramics

Control of oxygen vacancies and their kinetic behaviours via reversible oxygen loss in BiFeO3 ceramics
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通过 BiFeO3 陶瓷中可逆氧损失控制氧空位及其动力学行为

DOI:
10.1088/0022-3727/48/44/445301
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发表时间:
2015-10
期刊:
Journal of Physics D: Applied Physics
影响因子:
--
通讯作者:
Zhu, Jinsong
Zhu, Jinsong
中科院分区:
其他
文献类型:
--
作者:
Wu, Huarui;Wu, Huarui;Zhu, Jinsong;Zhu, Jinsong

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系统地研究了淬火BiFeO3陶瓷中的氧空位及其动力学行为。基于Vo+ ?的迁移,观察并讨论了复杂的弛豫过程。>, Vo2+ ?>和它们之间的跃迁,Vo+ ?>, Vo2+ ?>分别表示带一个正电荷和两个正电荷的氧空位。发现缺氧环境促进了Vo+ ?>到Vo2+ ?而氧气处理可以逆转这种转变。这项工作提供了一种可行的替代方法来调节氧空位及其迁移,有利于BiFeO3的应用。
Oxygen vacancies and their kinetic behaviours were systematically investigated in quenched BiFeO3 ceramics. Complex relaxation processes were observed and discussed based on the migration of Vo+ ?>, Vo2+ ?> and the transition in between them, where Vo+ ?>, Vo2+ ?> represent the oxygen vacancies with single and two positive charges, respectively. It is found that an oxygen-deficient environment promotes the transformation from Vo+ ?> to Vo2+ ?>, while oxygen treatment can reverse such a transformation. This work provides a feasible alternative method to modulate oxygen vacancies and their migration in favour of the applications of BiFeO3.
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