Work

Fabrication and thermoelectric characteristics of [(Bi,Pb)2Ba2O4±w]0.5CoO2 bulks with highly aligned grain structure

Year: 2008

Type: article

Abstract: Here, we report fabrication and thermoelectric characteristics of polycrystalline bulks with aligned grains of the misfit-layered cobalt oxides, [(Bi1−xPbx)2Ba2O4±w]0.5CoO2. High-quality precursor powder was prepared with a spray-drying technique. The precursor was then sintered under a uniaxial pressure to yield dense bulk samples consisting of highly aligned grains. The electrical conductivity of such samples was four times higher than that of conventionally sintered bulks. Accordingly, the thermoelectric characteristics of the grain-aligned specimens were enhanced.

Source: Journal of Applied Physics

DOI: 10.1063/1.2838161

Authors: T. Motohashi, Y. Nonaka, K. Sakai, M. Karppinen, H. Yamauchi

Institutions: Tokyo Institute of Technology, Materials & Structures Laboratory

Language: English

Topic: Advanced Thermoelectric Materials and Devices

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: green

Funders: Nissan Motor Company, Japan Society for the Promotion of Science