Evolution from ferroelectric to diffused ferroelectric, and relaxor ferroelectric in BaTiO3-BiFeO3 solid solutions
Evolution from ferroelectric to diffused ferroelectric, and relaxor ferroelectric in BaTiO3-BiFeO3 solid solutions
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BaTiO3-BiFeO3 固溶体中从铁电体到扩散铁电体和弛豫铁电体的演变
DOI：
10.1016/j.matchemphys.2016.08.024
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发表时间：
2016-11
影响因子：
4.6
通讯作者：
Gao Ziyan
中科院分区：
文献类型：
--
作者：
Wang Yaru;Pu Yongping;Li Xin;Zheng Hanyu;Gao Ziyan
采用传统固相法合成了（1-x）BaTiO 3-xBiFeO 3（（1-x）BT-xBF）（x= 0-0.08）陶瓷。研究了BF对BT陶瓷的晶体结构、微观形貌和介电性能的影响。X射线衍射（XRD）和拉曼光谱表明，在0≤ x≤ 0.08范围内，样品发生了从四方晶系到伪立方晶系的结构转变。随着x的升高，样品的晶粒尺寸变小，且变均匀.介电性能表明，x= 0，0.06和0.08的样品分别属于正常铁电体、扩散铁电体和弛豫铁电体。当x= 0.06和x= 0.08时，由于O2 −离子的迁移率，出现了与频率无关的电导率，晶粒和晶界中产生的缺陷分别与载流子沿着Fe 2+-Vo ′-Fe 3+链和Fe 2+与Fe 3+离子之间的跳跃有关，表明电子的跳跃过程不同.极化电回线变窄，表明陶瓷中存在顺电相和立方相，这与BT-BF陶瓷的XRD和拉曼光谱相一致。
Abstract (1− x) BaTiO 3-xBiFeO 3 ((1− x) BT-xBF)(x= 0–0.08) ceramics are synthesized via the conventional solid state method. And the influences of BF on the crystal structure, micromorphology and dielectric properties of BT ceramics have been investigated. X-ray diffractometer (XRD) and Raman spectra demonstrate a systematically structural transition from tetragonal to pseudo-cubic phase occurs from 0≤ x≤ 0.08. The grain size of the samples becomes smaller and more uniform with the elevation of x. Dielectric behaviors display that the samples with x= 0, 0.06, and 0.08 belong to normal ferroelectric, diffused ferroelectric, and relaxor ferroelectric, respectively. High frequency independent conductivity arises for x= 0.06 and x= 0.08 due to the mobility of O 2− ions and the defects generated in grain and grain boundary, which is in association with hopping of charge carriers along the Fe 2+-V o¨-Fe 3+ chain and between Fe 2+ and Fe 3+ ions, respectively, indicate different hopping process for electrons. The polarization-electric loops become narrow, demonstrate that there are the paraelectric and cubic phase exist in the ceramics, which is in agreement with the XRD patterns and Raman spectra of the BT-BF ceramics.
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影响因子：
3.9
作者：
J. Lim;Shujun Zhang;Namchul Kim;T. Shrout
通讯作者：
J. Lim;Shujun Zhang;Namchul Kim;T. Shrout
影响因子：
3.2
作者：
Huang, Chien-Chih;Cann, David P.
通讯作者：
Cann, David P.
影响因子：
3.2
作者：
Zhuo Li;H. Fan;Shujing Jia;Lifang Song;Jinkai Wang
通讯作者：
Zhuo Li;H. Fan;Shujing Jia;Lifang Song;Jinkai Wang
影响因子：
3.2
作者：
C. Stringer;T. Shrout;C. Randall
通讯作者：
C. Stringer;T. Shrout;C. Randall
影响因子：
3.9
作者：
C. Stringer;N. J. Donnelly;T. Shrout;C. Randall;E. Alberta;W. Hackenberger
通讯作者：
C. Stringer;N. J. Donnelly;T. Shrout;C. Randall;E. Alberta;W. Hackenberger