NEW COPPER PHOSPHATES WITH THE NASICON OR ALLUAUDITE-TYPE STRUCTURES AS IONIC OR MIXED CONDUCTORS

被引：11

作者：

WARNER, TE ^{[1
]}

MILIUS, W ^{[1
]}

MAIER, J ^{[1
]}

机构：

[1] MAX PLANCK INST FESTKORPERFORSCH, HEISENBERGSTR 1, D-70569 STUTTGART, GERMANY

来源：

SOLID STATE IONICS | 1994年 / 74卷 / 3-4期

关键词：

COPPER PHOSPHATES; NASICON; ALLUAUDITE; MAGNETIC SUSCEPTIBILITY; ELECTRICAL CONDUCTIVITY; MIXED VALENCY;

D O I：

10.1016/0167-2738(94)90200-3

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：

The electrical properties of the copper(I) phosphates CuTi2(PO4)3, CuTiZr(PO4)3, CuZr2(PO4)3, Cu2ZrSc(PO4)3 and Cu2TiCr(PO4)3 which adopt the NASICON structure are reviewed with comparison to their sodium analogues. Two new compounds (Cu(I)Cu(II))1.35(Fe(II)Fe(III))3(PO4)3 and Cu(I)Cu(II)Mg3 (PO4)3 exhibiting the alluaudite-type structure have been prepared and characterised. Cu(I)Cu(II)Mg3 (PO4)3 shows mixed copper valency and mixed conductivity, with a roughly temperature independent transport number t(ion) (Cu2Mg3(PO4)3) = 0.3, and E(a) = 0.96 eV, suggesting a coupling of the two transport mechanisms. A mechanistic comparison is made with the mixed valence NASICON compound Na2.5ZrFe(II)0.5Fe(III)0.5 (PO4)3.

引用

页码：119 / 123

页数：5

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