Investigation of Preparation and Thermoelectric Properties of Ca_2.5La_0.5Co₄O₉ Porous Ceramics

Abstract:

CO(NH₂)₂ as pore-former used to prepare porous Ca_2.5La_0.5Co₄O₉ thermoelectric materials by solid-state reaction technique.Microstructure,density and thermoelectric properties (temperature dependence of electrical resistivity,Seebeck coefficient) of the samples were studied in details.The results have shown that the porosity increases and the pore structure is improved with the pore-former content increasing,and electrical resistivity and density decrease while Seebeck coefficient raise.The improvement in electrical resistivity and Seebeck coefficient leads to higher power factor values at 913 K (around 1.32 mW/cm·K²) than undoped samples.

• Periodical: Advanced Materials Research (Volumes 1120-1121)
• Pages: 98-101
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1120-1121.98
• Online since: July 2015
• Authors: Peng Xia Ji*, Hui Min Zhang, Ai Min Chang
• Keywords: Ca_2.5La_0.5Co₄O₉, Porosity, Thermoelectric Materials, Thermoelectric Properties

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