Nonlinear impedance as possible result of ion-polaron interaction in Cu2O-Al2O3-SiO2 glass

被引：5

作者：

Barczynski, R. J. ^{[1
]}

机构：

[1] Gdansk Univ Technol, Fac Appl Phys & Math, PL-80952 Gdansk, Poland

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 2010年 / 356卷 / 37-40期

关键词：

Transition metal oxide glasses; Mixed electronic - ionic conduction; Nonlinearity; OXIDE GLASSES; SPECTROSCOPY; CONDUCTIVITY; TRANSPORT;

D O I：

10.1016/j.jnoncrysol.2010.07.003

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Nonlinear a.c. impedance measurements were performed in the Cu2O-Al2O3-SiO2 glass in a wide frequency range. The obtained results showed a large nonlinearity observed in the impedance signal at moderate electric fields of an order of 1 V/mm. The contents of the third harmonics reached about 10% and strongly depended on the temperature and frequency. The investigated glass exhibited mixed electronic-ionic conductivity. Electronic conduction occurred by small polaron hopping between Cu+ and Cu2+ ions. On the other hand, the movement of Cu2+ ions was responsible for ionic conductivity. We believe that both processes modify each other in a complicated way and the impedance should not be considered linear any more. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：1962 / 1964

页数：3

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