Dielectric relaxation in amorphous and amorphous-crystalline lead titanate

被引:1
作者
Korotkov, LN [1 ]
Gridnev, SA [1 ]
Khodorov, AA [1 ]
Kashirskii, SV [1 ]
Konstantinov, SA [1 ]
Likhosherstova, TI [1 ]
机构
[1] Voronezh State Tech Univ, Voronezh 394026, Russia
关键词
ferroelectrics; phase transition; dielectric relaxation; amorphous material; d.c. field effect;
D O I
10.1080/00150190390206284
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The effect of thermal annealing on processes of dielectric relaxation and dielectric properties of amorphous and amorphous-crystalline lead titanate within the temperature range, including the crystallization temperature was studied. Two anomalies of losses in a temperature range similar to200-460degreesC were found. The first one is probably related to making free of traps, and second one is due to presence of polar regions and their interaction with mobile charge carriers. The d.c. field effect on dielectric permittivity of amorphous sample mainly related to increasing of its conductivity under high electric field. The analysis of time dependences of dielectric permittivity shows two mechanisms of crystallization.
引用
收藏
页码:823 / 832
页数:10
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