"Anticomposite effect" in the system glassy LiPO3/crystalline MgO

被引：2
|
作者：
Andreev, O. L. [1 ]
Raskovalov, A. A. [1 ]
Antonov, B. D. [1 ]
Zhuravlyov, N. A. [2 ]
Denisova, T. A. [2 ]
机构：
[1] RAS, Ural Branch, Inst High Temp Elect, Ekaterinburg 620990, Russia
[2] RAS, Inst Solid State Chem, Ekaterinburg 620990, Russia
来源：
SOLID STATE IONICS | 2012年 / 220卷
关键词：
Li-ion conductivity; Glass-crystal composite; NMR; LITHIUM METAPHOSPHATE; ELECTRICAL-CONDUCTIVITY; PHOSPHATE-GLASSES; LI2S-P2S5; GLASSES; CRYSTALLIZATION; CERAMICS;
D O I：
10.1016/j.ssi.2012.05.032
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：
Composite materials glassy LiPO3/crystalline MgO (phi(Mgo) = 0-18 vol.%) have been obtained. Their transport properties have been examined by the electrochemical impedance technique. It was shown that with an increase in the MgO content the ionic conductivity decreases appreciably. The concentration dependence of the conductivity is described by the mixing rule proposed in this work: sigma(alpha(phi gl,phi Mgo))(r) = phi(gl) - g phi(gl)phi(Mgo) + g phi(gl)phi(Mgo)theta(alpha(phi gl,phi Mgo)). Comparison of the experimental data with the results of fitting with this equation revealed that an addition of MgO decreases the Li-ion conductivity of the glass matrix. The results of Li-7 NMR confirm that the some Li-ions of LiPO3 glass become less mobile. (c) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：12 / 17
页数：6
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