Dielectric investigation of magnesium salt of 12-tungstophosphoric acid hydrate

被引：10
|
作者：
Davidovic, M
Cajkovski, T
Cajkovski, D
Likar-Smiljanic, V
Biljic, R
Mioc, U
Nedic, Z
机构：
[1] Vinca Inst Nucl Sci, YU-11001 Belgrade, Yugoslavia
[2] Univ Belgrade, Fac Elect Engn, YU-11001 Belgrade, Yugoslavia
[3] VTA, YU-11000 Belgrade, Yugoslavia
[4] Univ Belgrade, Fac Phys Chem, YU-11001 Belgrade, Yugoslavia
来源：
SOLID STATE IONICS | 1999年 / 125卷 / 1-4期
关键词：
heteropolyacid salts; protonic conductivity; permittivity measurements;
D O I：
10.1016/S0167-2738(99)00203-9
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：
Magnesium salt of 12-tungstophosphoric acid (WPA) hydrate MgHPW12O40-14H(2)O has been investigated in the microwave (X-band) and in the lower frequency (5 Hz-500 kHz) region. The specimens were obtained by pressing powder. Real and imaginary parts of permittivity were obtained for the specimens in both frequency regions. In the microwave region dipolar relaxation was observed with the relaxation time tau = 1.6 X 10(-11) s. This relaxation is attributed to the fast reorientation of H2O molecules. In the lower frequency region ionic jump relaxation was observed with the relaxation time tau = 3.9 X 10(-7) s. Results on ac and dc conductivity are discussed. (C) 1999 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：411 / 415
页数：5
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