DIELECTRIC BEHAVIOR OF POLYCRYSTALLINE LEAD GERMANATE

被引：21

作者：

MANSINGH, A ^{[1
]}

SRIVASTAVA, KN ^{[1
]}

SINGH, B ^{[1
]}

机构：

[1] DEF SCI LAB,DELHI 110054,INDIA

来源：

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 1979年 / 40卷 / 01期

关键词：

D O I：

10.1016/0022-3697(79)90089-1

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The dielectric behaviour of ferroelectric Lead Germanate (Pb5Ge3O11) is reported in the frequency region 60 Hz-100 KHz for various particle size ranges from 40 to 300 μ m. The dielectric constant and conductivity decrease with decreasing particle size. The dielectric anomaly in small particle size unsintered samples disappears at lower frequencies, while at 100 KHz a broad diffuse phase transition is observed for all the samples, irrespective of particle size. A strong dielectric dispersion has been observed in the frequency range 60 Hz-100 KHz. The dielectric constant of sintered samples for the same panicle size range, and the dielectric anomaly which was absent at lower frequencies for unsintered samples re-appears in sintered samples. These results have been explained by assuming a high resistivity surface layer having a lower dielectric constant than the bulk at the boundary of particles. © 1979.

引用

页码：9 / 15

页数：7

共 22 条

[1]

BOTTCHER GFJ, 1952, THEORY ELECTRIC POLA, P417

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