The thermal-transport properties of the Ca3-xAgxCo4O9 system (0≤x≤0.3)
- 1. Center for Condensed Matter Science and Technology (CCMST), Department of Physics, Harbin Institute of Technology, Harbin 150001 (China)
Description
Polycrystalline Ca3-xAgxCo4O9 (0≤x≤0.3) samples were prepared by solid-state reaction and their thermo-transport properties were studied from 5 K to room temperature. With the substitution of Ag+ for Ca2+, the internal chemical pressure induced by Ag+ doping has a strong effect on the transport properties of such a strongly correlated Fermi liquid system. The electrical conductivity and the thermoelectric power increase simultaneously because of the enhancement of carrier concentration and the change of carrier mobility. The thermal conductivity decreases monotonically up to x = 0.3 due to the Ag ion acting as a rattler in the system. These results showed that the thermoelectric performance of the Ca3Co4O9 system can be improved by doping with Ag
Additional details
Identifiers
- DOI
- 10.1088/0953-8984/19/35/356216;
- PII
- S0953-8984(07)46231-2;
Publishing Information
- Journal Title
- Journal of Physics. Condensed Matter
- Journal Volume
- 19
- Journal Issue
- 35
- Journal Page Range
- p. 356216
- ISSN
- 0953-8984
- CODEN
- JCOMEL
INIS
- Country of Publication
- United Kingdom
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 39047644
- Subject category
- S36: MATERIALS SCIENCE; S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
- Descriptors DEI
- CALCIUM COMPOUNDS; CALCIUM IONS; CARRIER MOBILITY; COBALT OXIDES; ELECTRIC CONDUCTIVITY; FERMI GAS; POLYCRYSTALS; SILVER COMPOUNDS; SILVER IONS; TEMPERATURE RANGE 0273-0400 K; THERMAL CONDUCTIVITY
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; CHALCOGENIDES; CHARGED PARTICLES; COBALT COMPOUNDS; CRYSTALS; ELECTRICAL PROPERTIES; IONS; MOBILITY; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; TEMPERATURE RANGE; THERMODYNAMIC PROPERTIES; TRANSITION ELEMENT COMPOUNDS