Effect of Nd modification on electrical properties of mixed-layer Aurivillius phase Bi4Ti3O12-SrBi4Ti4O15
Effect of Nd modification on electrical properties of mixed-layer Aurivillius phase Bi4Ti3O12-SrBi4Ti4O15
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DOI：
10.1063/1.2753582
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发表时间：
2007-07
影响因子：
3.2
通讯作者：
Wei Wang-;S. Gu;X. Mao;Xiao-bing Chen
中科院分区：
文献类型：
--
作者：
Wei Wang-;S. Gu;X. Mao;Xiao-bing Chen
The effect of Nd modification on ferro-, piezo-, and dielectric properties of intergrowth Bi4Ti3O12-SrBi4Ti4O15 ceramics was investigated. X-ray diffraction and Raman scattering were used to identify the crystal phase and to distinguish the doping sites. With increasing Nd content up to 0.50, both remanent polarization (2Pr) and piezoelectric coefficient (d33) were found to increase and reach the maximum value of 33.2 μC/cm2 and 14 pC/N, respectively, which gained an enlargement over 1.7 times in 2Pr and a desirable 75% increment in d33 value. However, further Nd modification starts to deteriorate the ferro- and piezoelectric behavior. Impedance spectroscopy shows the activation energy of conductivity increased with increasing Nd content, which can be regarded as direct proof of the restraint of oxygen vacancies. The thermal variations of dielectric permittivity and loss tan δ with Nd content show the characteristic of diffuse phase transformation while the convincible defect-related relaxation phenomenon...
