High oxide-ion conductivity in acceptor-doped Bi-based perovskites at modest doping levels.
High oxide-ion conductivity in acceptor-doped Bi-based perovskites at modest doping levels.
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在适度掺杂水平下,受主掺杂的铋基钙钛矿具有高氧化物离子电导率。
DOI:
10.1039/d1cp01120k
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发表时间:
2021
期刊:
影响因子:
--
通讯作者:
Li L
中科院分区:
文献类型:
--
作者:
Li L
A combination of impedance spectroscopy, time-of-flight secondary ion mass spectrometry and literature data are used to show that, (i) the bulk oxide ion conductivity of A-site, alkaline earth-doped BiFeO3 (BF) is independent of the ionic radius of the alkaline earth ion (Ca, Sr, Ba) and, (ii) despite very different A-site environments in (Na1/2Bi1/2)TiO3 and BF, similar high levels and optimisation of bulk oxide ion conductivity in these Bi-based tilted perovskites is achieved at modest acceptor doping levels of ∼1–10%. These results clearly demonstrate that optimisation of oxide ion conductivity in these materials requires concepts beyond a simple crystallochemical approach based on matching the ionic radii of acceptor dopant and host lattice ions.
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