Processing, phase transitions, and dielectric properties of BSPT ceramics

被引：7
|
作者：
Politova, E. D. [1 ]
Kaleva, G. M. [1 ]
Mosunov, A. V. [1 ]
Segalla, A. H. [2 ]
Dosovitskiy, A. E. [3 ]
Mikhlin, A. L. [3 ]
机构：
[1] L Ya Karpov Inst Phys Chem, Obukha S St 3-1-12, Moscow 105064, Russia
[2] ELPA Co, Moscow 124460, Russia
[3] IREA, Moscow 107076, Russia
来源：
JOURNAL OF ADVANCED DIELECTRICS | 2013年 / 3卷 / 03期
基金：
俄罗斯基础研究基金会;
关键词：
BiScO3-PbTiO3 solid solutions; morphotropic phase boundary; phase transitions; ferroelectric; piezoelectric properties; oxygen vacancies; dielectric relaxation;
D O I：
10.1142/S2010135X13500240
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Solid solutions on the base of composition from morphotropic phase boundary (1 - x) BiScO3-xPbTiO(3) with x = 0.64, 0.645, 0.65 were prepared from nitrates solutions. Variations in phase content, structure parameters, microstructure, dielectric and piezoelectric properties of dense ceramic samples were studied. The first-order phase transitions were observed at temperatures near 700 K. The influence of the processing conditions on the morphology, temperature of phase transitions, and dielectric parameters was observed. In some ceramics effect of dielectric relaxation was observed at high temperatures. This effect was explained by the contribution from ionic transport due to the oxygen vacancies creation during high temperature sintering.
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页数：5
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