Ferroelectricity in the glassy material of the composition Bi2O3-Pb3O4-CuO-K2O

被引：17

作者：

Bahgat, A. A. ^{[1
]}

Makram, B. A. A. ^{[1
]}

Shaisha, E. E. ^{[1
]}

El-Desoky, M. M. ^{[2
]}

机构：

[1] Al Azhar Univ, Dept Phys, Fac Sci, Nasr City 11884, Cairo, Egypt

[2] Suze Canal Univ, Dept Phys, Fac Educ, Al Arish, Egypt

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2010年 / 506卷 / 01期

关键词：

Bi-Pb-Cu glass; Ferroelectricity; Pyroelectricity; Curie temperature; Dc conductivity; POLARON HOPPING CONDUCTION; SPONTANEOUS MAGNETIC ORDER; ELECTRICAL-PROPERTIES; DC CONDUCTIVITY; OXIDE GLASSES; THIN-FILMS; BEHAVIOR; PYROELECTRICITY; SUPERCONDUCTOR; CRYSTALLINE;

D O I：

10.1016/j.jallcom.2010.06.161

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Glass sample of the composition 31.4 Bi2O3-2.33 Pb3O4-64.53 CuO-1.74 K2O in mol% was prepared by the conventional quenching melt technique. The as-quenched single phase glass shows interesting ferroelectric properties which is not known in the field of glass science. If the as-quenched glass is heat treated above the glass transition temperature all signs of ferroelectricity disappears completely. X-ray diffraction and transmission electron microscopy as well as differential thermal analysis were used to recognize the glassy nature of the as-quenched sample. Ac dielectric measurements were performed as a function of temperature and frequency and showing ferroelectric to paraelectric phase transition at Curie's temperature of 540 K. Non-linear polarization as a function of temperature and applied electric field as well as pyroelectricity were also studied. The conduction mechanism was confirmed to obey the adiabatic small polaron hopping (SPH) and was mainly due to electronic transport between Cu ions. The dominant factor determining conductivity was the hopping carrier mobility in this glass. From the best fits, reasonable values of various SPH and VRH parameters are obtained. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：141 / 150

页数：10

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