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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Effect of Cr substitution on the structure and electrical properties of BiFeO3 ceramics
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Effect of Cr substitution on the structure and electrical properties of BiFeO3 ceramics

机译：Cr替代对BiFeO3陶瓷结构和电性能的影响

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摘要

Polycrystalline BiFe1-xCrxO3 ceramics with x=0-1 have been produced via a mixed oxide route. The effects of Cr substitution on the structure and on the electrical and ferroelectric properties of BiFe1-x CrxO3 samples have been studied by performing x-ray diffraction, dc resistivity and dielectric measurements as well as characterizing the polarization-field hysteresis loop. The results indicate that the structure of BiFeO3 can be altered dramatically with a small amount of Cr doping ( x = 0.005 - 0.1). Substitution of Cr for Fe results in large variations in the resistivity of BiFeO3 ceramics. The resistivity of BiFe1-x CrxO3 samples reaches a maximum value of 2 x 10(12) Omega cm at x = 0.1, which is about two and a half times higher than that for pure BiFeO3. Doping with 1 mol% Cr increases the dielectric constant and the remnant polarization to four and ten times, respectively, as large as those of a pure sample. There is a strong correlation between the electrical resisitivity, the dielectric constants and the remnant polarization of BiFe1-xCrxO3 ceramics.
机译：x = 0-1的多晶BiFe1-xCrxO3陶瓷是通过混合氧化物途径生产的。通过进行x射线衍射，直流电阻率和介电测量以及表征极化场磁滞回线，研究了Cr替代对BiFe1-x CrxO3样品的结构以及电学和铁电性能的影响。结果表明，少量的Cr掺杂（x = 0.005-0.1）可以显着改变BiFeO3的结构。用Cr代替Fe会导致BiFeO3陶瓷的电阻率发生较大变化。 BiFe1-x CrxO3样品的电阻率在x = 0.1时达到2 x 10（12）Ωcm的最大值，比纯BiFeO3的电阻率高大约两倍半。掺杂1 mol％的Cr可使介电常数和剩余极化分别达到纯样品的四倍和十倍。 BiFe1-xCrxO3陶瓷的电阻率，介电常数和残余极化之间存在很强的相关性。

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