Tuning the electrical conductivity of Rare Earth-doped BaTiO3 using Gd2O3 as an exemplar
Tuning the electrical conductivity of Rare Earth-doped BaTiO3 using Gd2O3 as an exemplar
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以 Gd2O3 为例调节稀土掺杂 BaTiO3 的电导率
DOI：
10.1016/j.oceram.2022.100250
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Ben L
中科院分区：
文献类型：
--
作者：
Ben L
用阻抗谱研究了不同掺杂机制制备的Gd掺杂BaTiO_3陶瓷的电学性质，并与相图研究中提出的掺杂机制和原子模拟得到的溶液能量进行了关联。制备了未掺杂BaTiO_3、BaTi1-xGdxO_3-x/2、Ba1-y/2Ti1-y/2GdyO_3和Ba1-zGdzTi1-z/4O_3。前两个系列和0.10个样品具有非本征p型导电，这是由于氧空位的存在引起的氧增益(氧化)。核壳微结构导致电性不均匀，其中y=0.10。对于y-≥=0.10，氧空位是通过在Ba位上少量过量的Gd3+取代而消除的，从而导致本征(带型)导电。在空气中处理的所有Ba1-zGdzTi1-z/403陶瓷都具有n型半导体，这归因于在烧结过程中有少量的氧损失(还原)。在流动的O2气氛中加工陶瓷可以防止氧的损失。
The electrical properties of Gd-doped BaTiO3ceramics prepared by various doping mechanisms have been investigated using Impedance Spectroscopy and correlated with the proposed doping mechanisms observed from phase diagram studies and with solution energies obtained from atomistic simulations. Undoped BaTiO3, BaTi1-xGdxO3-x/2, Ba1-y/2Ti1-y/2GdyO3and Ba1-zGdzTi1-z/4O3were prepared. The first two series and y < 0.10 samples possess extrinsic p-type conduction due to oxygen gain (oxidation) associated with the presence of oxygen vacancies. A core-shell microstructure causes electrical heterogeneity where y < 0.10. For y ≥ 0.10, oxygen vacancies are eliminated by substitution of a small excess of Gd3+at the Ba-site leading to intrinsic (band-type) conduction. All Ba1-zGdzTi1-z/4O3ceramics processed in air exhibit n-type semiconductivity that is attributed to a small amount of oxygen loss (reduction) during sintering. The oxygen loss can be prevented by processing ceramics in a flowing O2atmosphere.
DOI：
10.1016/j.jeurceramsoc.2006.10.013
发表时间：
2007-01-01
影响因子：
5.7
作者：
Thakur, O. P.;Feteira, A.;Sinclair, D. C.
通讯作者：
Sinclair, D. C.
Nb掺杂BaTiO3的合成及电学性能
影响因子：
--
作者：
N. Masó;H. Beltrán;E. Cordoncillo;A. Flores;P. Escribano;D. Sinclair;A. West
通讯作者：
A. West