New method to improve the grain alignment and performance of thermoelectric ceramics

被引：53

作者：

Ferreira, N. M. ^{[1
]}

Rasekh, Sh ^{[2
]}

Costa, F. M. ^{[1
]}

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

Sotelo, A. ^{[2
]}

Diez, J. C. ^{[2
]}

Torres, M. A. ^{[3
]}

机构：

[1] Univ Aveiro, Dept Fis, i3N, P-3810193 Aveiro, Portugal

[2] Univ Zaragoza, Inst Ciencia Mat Aragon, CSIC, Zaragoza 50018, Spain

[3] Univ Zaragoza, Dept Ingn Diseno & Fabricac, Zaragoza 50018, Spain

来源：

MATERIALS LETTERS | 2012年 / 83卷

关键词：

Texturing; Thermoelectric ceramics; Electrical properties; Thermopower; FIBERS; OXIDES; SR;

D O I：

10.1016/j.matlet.2012.05.131

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Textured Bi2Ca2Co1.7Ox ceramic rods were obtained by Electrically Assisted Laser Floating Zone (EALFZ) technique. The polarity effects of an external current, applied during the laser floating zone growth, have been investigated. Microstructure and thermoelectric properties have been studied and correlated with the current polarity. An important improvement of power factor was obtained for samples grown with the positive pole connected to the seed. This result evidences the advantages of EALFZ technique as a potential method for obtaining high performance thermoelectric materials. Crown Copyright (C) 2012 Published by Elsevier B.V. All rights reserved.

引用

页码：144 / 147

页数：4

共 23 条

[1] Electrical field freezing effect on laser floating zone (LFZ)-grown Bi2Sr2Ca2CU4O11 superconducting fibres [J].

Carrasco, MF ;

Silva, RF ;

Vieira, JM ;

Costa, FM .

SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2004, 17 (04) :612-619

[2] The effect of current direction on superconducting properties of BSCCO fibres grown by an electrically assisted laser floating zone process [J].

Carrasco, MF ;

Amaral, VS ;

Vieira, JM ;

Silva, RF ;

Costa, FM .

SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2006, 19 (01) :15-21

[3] LFZ fibre texture modification induced by electrical polarization [J].

Costa, FM ;

Carrasco, MF ;

Ferreira, N ;

Silva, RF ;

Vieira, JM .

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2004, 408 :915-916

[4]

Costa FM, 2007, PERSPECTIVES SUPERCO, P35

[5] WAVELENGTH DEPENDENCE IN LASER FLOATING-ZONE PROCESSING - A CASE-STUDY WITH BI-SR-CA-CU-O SUPERCONDUCTORS [J].

DELAFUENTE, GF ;

DIEZ, JC ;

ANGUREL, LA ;

PENA, JI ;

SOTELO, A ;

NAVARRO, R .

ADVANCED MATERIALS, 1995, 7 (10) :853-&

[6] 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

[7] 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

[8] Synthesis and thermoelectric properties of Bi2.5Ca2.5Co2Ox layered cobaltites [J].

Guilmeau, E ;

Mikami, M ;

Funahashi, R ;

Chateigner, D .

JOURNAL OF MATERIALS RESEARCH, 2005, 20 (04) :1002-1008

[9] Thermoelectric performance of Bi- and Na-substituted Ca3Co4O9 improved through ceramic texturing [J].

Masuda, Y ;

Nagahama, D ;

Itahara, H ;

Tani, T ;

Seo, WS ;

Koumoto, K .

JOURNAL OF MATERIALS CHEMISTRY, 2003, 13 (05) :1094-1099

[10] A new process for lamellar texturing of thermoelectric Ca3Co4O9 oxides by spark plasma sintering [J].

Noudem, J. G. .

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2009, 29 (12) :2659-2661

← 1 2 3 →