Characterization of delafossite-type CuCoO2 prepared by ion exchange

被引：56

作者：

Beekman, M. ^{[2
]}

Salvador, J. ^{[1
]}

Shi, X. ^{[3
]}

Nolas, G. S. ^{[2
]}

Yang, J. ^{[1
]}

机构：

[1] Gen Motors R&D Ctr, Mat & Proc Lab, Warren, MI 48090 USA

[2] Univ S Florida, Dept Phys, Tampa, FL 33620 USA

[3] Optimal Inc, Plymouth Township, MI 48170 USA

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2010年 / 489卷 / 02期

关键词：

Delafossite; Oxide; Ion exchange synthesis; Metathesis reaction; Thermoelectric materials; NOBLE METAL OXIDES; CRYSTAL-CHEMISTRY; CUALO2;

D O I：

10.1016/j.jallcom.2009.09.124

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：

Polycrystalline specimens of the delafossite oxide CuCoO2 (space group R (3) over barm, a=2.8494(2)angstrom, c = 16.926(1)angstrom, Z = 3) were prepared by metathesis reaction between CuCl and LiCoO2 at 590 degrees C and characterized by powder X-ray diffraction, thermal analysis, magnetic susceptibility, and electrical transport measurements. Decomposition of the title compound at 680 degrees C to its respective binary oxides was observed by thermal analysis. Electrical resistivity and magnetic susceptibility data for polycrystalline CuCoO2 are consistent with formal charge assignments of Cu+ and Co3+ for the transition metal constituents, while the room temperature Seebeck coefficient for the nominally undoped specimen was found to be -175 mu V/K. The experimental data are consistent with recent density functional theory calculations for this material. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：336 / 338

页数：3

共 22 条

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