Published February 21, 2008 | Version v1
Journal article Metadata-only

Efficient room temperature thermoelectric characteristics of Ca3-xAgxCo4O9+δ/Agy composites

Creators

  • 1. Center for Condensed Matter Science and Technology (CCMST), Department of Physics, Harbin Institute of Technology, Harbin 150001 (China)

Description

We report measurements of electrical resistivity, thermopower and thermal conductivity for a series of high-textured Ag-doped and Ag-added Ca3Co4O9+δ ceramic specimens. The results show that variable range hopping transport behaviour of the system transforms from two-dimensional to quasi-three-dimensional with Ag addition, which is isotropic to a certain extent. The thermoelectric (TE) performance of Ca3Co4O9+δ is improved effectively by Ag+ doping or/and Ag addition. The Ca2.7Ag0.3 Co4O9+δ/Ag0.3 composite exhibits quite a respectable room temperature ZT value of 0.1, suggesting that such a composite is a promising candidate for p-type room temperature TE cooling application

Availability note (English)

Available from http://dx.doi.org/10.1088/0022-3727/41/4/045406

Additional details

Identifiers

DOI
10.1088/0022-3727/41/4/045406;
PII
S0022-3727(08)64281-3;

Publishing Information

Journal Title
Journal of Physics. D, Applied Physics
Journal Volume
41
Journal Issue
4
Journal Page Range
[7 p.]
ISSN
0022-3727
CODEN
JPAPBE

INIS

Country of Publication
United Kingdom
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
40060969
Subject category
S36: MATERIALS SCIENCE;
Descriptors DEI
CALCIUM COMPOUNDS; CERAMICS; COBALT OXIDES; COOLING; DOPED MATERIALS; ELECTRIC CONDUCTIVITY; SILVER; SILVER COMPOUNDS; SILVER IONS; TEMPERATURE RANGE 0273-0400 K; THERMAL CONDUCTIVITY; THREE-DIMENSIONAL CALCULATIONS; TWO-DIMENSIONAL CALCULATIONS
Descriptors DEC
ALKALINE EARTH METAL COMPOUNDS; CHALCOGENIDES; CHARGED PARTICLES; COBALT COMPOUNDS; ELECTRICAL PROPERTIES; ELEMENTS; IONS; MATERIALS; METALS; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; TEMPERATURE RANGE; THERMODYNAMIC PROPERTIES; TRANSITION ELEMENT COMPOUNDS; TRANSITION ELEMENTS