Effect of Sr substitution for Ca on the Ca3Co4O9 thermoelectric properties

被引：73

作者：

Constantinescu, G. ^{[1
]}

Rasekh, Sh ^{[1
]}

Torres, M. A. ^{[2
]}

Diez, J. C. ^{[1
]}

Madre, M. A. ^{[1
]}

Sotelo, A. ^{[1
]}

机构：

[1] ICMA UZ CSIC, Dpto Ciencia & Tecnol Mat & Fluidos, E-50018 Zaragoza, Spain

[2] Univ Zaragoza, Dpto Ingn Diseno & Fabricac, E-50018 Zaragoza, Spain

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2013年 / 577卷

关键词：

Doping; Sintering; Cobaltites; Electrical properties; Thermopower; CERAMICS; PERFORMANCE; IMPROVEMENT; MICROSTRUCTURE; OPTIMIZATION; ENHANCEMENT; FABRICATION; COBALTITES; GROWTH; LAYER;

D O I：

10.1016/j.jallcom.2013.07.005

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：

Ca3-xSrxCo4O9 polycrystalline thermoelectric ceramics with small amounts of Sr have been synthesized by the classical solid state method. Microstructural characterizations have shown that all the Sr has been incorporated into the Ca3Co4O9 and Ca3Co2O6 structures and no Sr-based secondary phases have been produced. Apparent density measurements have shown that samples slightly increase their density until 0.05 Sr content, decreasing for higher contents. Electrical resistivity decreases and Seebeck coefficient slightly raises when Sr content increases until 0.07 Sr addition. The improvement in both parameters leads to higher power factor values than the usually obtained in samples prepared by the conventional solid state routes and close to those obtained in textured materials. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：511 / 515

页数：5

共 38 条

[1] Enhancement of the high-temperature thermoelectric performance of Bi2Ba2Co2Ox ceramics [J].

Constantinescu, G. ;

Rasekh, Sh. ;

Torres, M. A. ;

Madre, M. A. ;

Diez, J. C. ;

Sotelo, A. .

SCRIPTA MATERIALIA, 2013, 68 (01) :75-78

[2] Low temperature electrical and thermal transport properties of the Ca3-xSbxCo4O9 system [J].

Demirel, S. ;

Aksan, M. A. ;

Altin, S. .

JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS, 2012, 23 (12) :2251-2256

[3] Enhancement of Ca3Co4O9 thermoelectric properties by Cr for Co substitution [J].

Diez, J. C. ;

Torres, M. A. ;

Rasekh, Sh ;

Constantinescu, G. ;

Madre, M. A. ;

Sotelo, A. .

CERAMICS INTERNATIONAL, 2013, 39 (06) :6051-6056

[4] Improved Thermoelectric Properties of Bi-M-Co-O (M = Sr, Ca) Misfit Compounds by Laser Directional Solidification [J].

Diez, J. C. ;

Rasekh, S. H. ;

Madre, M. A. ;

Guilmeau, E. ;

Marinel, S. ;

Sotelo, A. .

JOURNAL OF ELECTRONIC MATERIALS, 2010, 39 (09) :1601-1605

[5] Improvement of Bi2Sr2Co1.8Ox thermoelectric properties by laser floating zone texturing [J].

Diez, J. C. ;

Guilmeau, E. ;

Madre, M. A. ;

Marinel, S. ;

Lemonnier, S. ;

Sotelo, A. .

SOLID STATE IONICS, 2009, 180 (11-13) :827-830

[6] New method to improve the grain alignment and performance of thermoelectric ceramics [J].

Ferreira, N. M. ;

Rasekh, Sh ;

Costa, F. M. ;

Madre, M. A. ;

Sotelo, A. ;

Diez, J. C. ;

Torres, M. A. .

MATERIALS LETTERS, 2012, 83 :144-147

[7]

FERREIRA NM, 2012, MICROSC MICROANAL S5, V18, P93, DOI DOI 10.1017/S1431927612013128

[8] An oxide single crystal with high thermoelectric performance in air [J].

Funahashi, R ;

Matsubara, I ;

Ikuta, H ;

Takeuchi, T ;

Mizutani, U ;

Sodeoka, S .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS, 2000, 39 (11B) :L1127-L1129

[9] Relationship among synthesis, microstructure and properties in sinter-forged Bi-2212 ceramics [J].

Garnier, V ;

Caillard, R ;

Sotelo, A ;

Desgardin, G .

PHYSICA C, 1999, 319 (3-4) :197-208

[10] Fabrication of textured thermoelectric layered cobaltites with various rock salt-type layers by using β-Co(OH)2 platelets as reactive templates [J].

Itahara, H ;

Xia, CT ;

Sugiyama, J ;

Tani, T .

JOURNAL OF MATERIALS CHEMISTRY, 2004, 14 (01) :61-66

← 1 2 3 4 →