Microstructure and thermoelectric properties of Zn1-xAlxO ceramics fabricated by spark plasma sintering

被引：58

作者：

Ma, N. ^{[1
,2
]}

Li, J. -F. ^{[1
]}

Zhang, B. P. ^{[2
]}

Lin, Y. H. ^{[1
]}

Ren, L. R. ^{[3
]}

Chen, G. F. ^{[3
]}

机构：

[1] Tsinghua Univ, Dept Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China

[2] Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China

[3] Siemens Ltd, Corp Technol, Beijing 100102, Peoples R China

来源：

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2010年 / 71卷 / 09期

关键词：

Ceramics; Oxides; Electrical conductivity; Thermal conductivity; AL-DOPED ZNO; TEMPERATURE; PERFORMANCE;

D O I：

10.1016/j.jpcs.2010.06.006

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Al-doped ZnO powders were synthesized via solid reaction between Zn(OH)(2) and Al(OH)(3) and consolidated by spark plasma sintering (SPS) to fabricate fine-grained Zn1-xAlxO ceramics as a thermoelectric material. X-ray diffraction and spectrophotometer experiments revealed that Al doping into ZnO is enhanced by the present process, and consequently the SPS-processed Zn1-xAlxO samples show significantly improved electrical conductivity as compared with those prepared via mixing ZnO and Al2O3 oxide powders. Because of the combined effect of Al doping and grain refinement, the present Zn1-xAlxO ceramics show much lower thermal conductivity, which also results in an enhanced dimensionless figure of merit (ZT), than un-doped ZnO oxides prepared also by SPS. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：1344 / 1349

页数：6

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