Trivalent ion conduction of the Sc2(WO4)3-Gd2(WO4)3 system

被引：24

作者：

Kobayashi, Y ^{[1
]}

Egawa, T ^{[1
]}

Okazaki, Y ^{[1
]}

Tamura, S ^{[1
]}

Imanaka, I ^{[1
]}

Adachi, G ^{[1
]}

机构：

[1] Osaka Univ, Fac Engn, Dept Appl Chem, Osaka 5650871, Japan

来源：

SOLID STATE IONICS | 1998年 / 111卷 / 1-2期

关键词：

trivalent; ion conductor; scandium; gadolinium; Sc-2(WO4)(3)-type structure;

D O I：

10.1016/S0167-2738(98)00171-4

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 trivalent ionic conduction in the Sc-2(WO4)(3)-Gd-2(WO4)(3) solid solution with the Sc-2(WO4)(3)-type structure was investigated. The solubility limit of Gd3+ in Sc-2(WO4)(3) is 60 mol% in the Sc site and the lattice size of the solid solution isotropically expands with increasing the Gd3+ content. The ionic conductivity of the system greatly increased with an increase of the Gd3+ substitution and the maximum value of 6.2 x 10(-5) S cm(-1) at 600 degrees C was obtained for the composition, Sc1.6Gd0.4(WO4)(3), which is three times higher than that of pure Sc-2(WO4)(3). The electrolysis result explicitly indicates that the predominant mobile species in the solid solution with the Sc-2(WO4)(3)-structure is trivalent Sc3+ ion and that Gd3+ ion in the electrolyte acts as a lattice forming ion to obtain a suitable lattice size for the Sc3+ ion migration. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：59 / 65

页数：7

共 20 条

[1] CRYSTAL STRUCTURE OF TRANSITION-METAL MOLYBDATES AND TUNGSTATES .2. DIAMAGNETIC SC2(WO4)3 [J].

ABRAHAMS, SC ;

BERNSTEIN, JL .

JOURNAL OF CHEMICAL PHYSICS, 1966, 45 (08) :2745-+

[2] THE IONIC DISTRIBUTION IN TRIVALENT GD-3+ BETA''-ALUMINA [J].

CARRILLOCABRERA, W ;

THOMAS, JO ;

FARRINGTON, GC .

SOLID STATE IONICS, 1983, 9-10 (DEC) :245-248

[3] ELECTRICAL-CONDUCTION IN LIGHT RARE-EARTH TUNGSTATES [J].

DAR, N ;

LAL, HB .

MATERIALS RESEARCH BULLETIN, 1979, 14 (10) :1263-1273

[4]

Dedecke T, 1996, EUR J SOL STATE INOR, V33, P185

[5] TRIVALENT ION-EXCHANGE IN BETA''-ALUMINA [J].

DUNN, B ;

FARRINGTON, GC .

SOLID STATE IONICS, 1983, 9-10 (DEC) :223-225

[6] THE LANTHANIDE BETA-'' ALUMINAS - A NEW FAMILY OF FLUORESCENT SOLID ELECTROLYTES [J].

FARRINGTON, GC ;

DUNN, B ;

THOMAS, JO .

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 1983, 32 (03) :159-161

[7] MIXED IONO-ELECTRONIC CONDUCTION IN BETA-LANB3O9 [J].

GEORGE, AM ;

VIRKAR, AN .

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 1988, 49 (07) :743-751

[8]

GHOSAL B, 1983, SOLID STATE IONICS, V9-10, P273, DOI 10.1016/0167-2738(83)90246-1

[9] Rare earth contribution in solid state electrolytes, especially in the chemical sensor field [J].

Imanaka, N ;

Adachi, G .

JOURNAL OF ALLOYS AND COMPOUNDS, 1997, 250 (1-2) :492-500

[10] A DIRECT EVIDENCE FOR TRIVALENT ION CONDUCTION IN SOLIDS [J].

IMANAKA, N ;

KOBAYASHI, Y ;

ADACHI, GY .

CHEMISTRY LETTERS, 1995, (06) :433-434

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