期刊
JOURNAL OF SOLID STATE CHEMISTRY
卷 180, 期 10, 页码 2747-2755出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jssc.2007.07.025
关键词
dielectric properties; optical absorption; ESR spectra
In this paper, Studies on various physical properties, viz., dielectric properties (dielectric constant, loss tan delta, a.c. conductivity sigma) over a wide range of frequency and temperature, optical absorption, ESR at liquid nitrogen temperature and magnetic susceptibility at room temperature of Li2O-CaF2-P2O5: Cr2O3 glass Ceramics, have been reported. The optical absorption, ESR and magnetic susceptibility studies indicate that the chromium ions exist in Cr5+, Cr4+ and Cr6+ states in addition to Cr3+ state in these samples. The dielectric constant and loss variation with the concentration of Cr2O3 have been explained on the basis of space charge polarization mechanism. The dielectric relaxation effects exhibited by these samples have been analysed by a graphical method and the spreading of dielectric relaxation has been established. The a.c. conductivity in the high-temperature region seems to be connected both with electronic and ionic movements. (C) 2007 Elsevier Inc. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据