Effects of Ag Addition on Microstructure and Thermoelectric Properties of NaxCo2O4 Synthesized by Citric Acid Complex Process
Year: 2007
Type: article
Abstract: A thermoelectric NaxCo2O4/Ag composite was synthesized by citric acid complex process using CH3COOAg as an Ag source. The powder precursor after calcination was composed of plate-like NaxCo2O4 grains and Ag particles. The Ag addition deteriorated crystallographic anisotropy of the sintered body. However, the electrical resistivity and the Seebeck coefficient of this composite were significantly smaller and slightly larger, respectively, than those of the sample without Ag, resulting in lager power factor. The Ag phase dispersed in the NaxCo2O4 matrix contained about 5–17 at.% Co, which is considered to cause the increase in Seebeck coefficient.
Source: MATERIALS TRANSACTIONS
Authors: Mikio Ito, Daisuke Furumoto
Institution: The University of Osaka
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2035887520