High-temperature segmented thermoelectric oxide module using p-type Ca3Co4O9 and n-type ZnAlO/CaMn0.95Nb0.05O3 legs

Thanh Hung Le, Ngo Van Nong, G. Jeffrey Snyder, Nini Pryds, Søren Linderoth

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Abstract

Thermoelectric (TE) power generator using TE materials which directly convert heat into electricity offers a viable environmental friendly technology for waste heat recovery. Recently, TE oxide modules have gained much attraction since they are composed of cheap materials and are stable at high temperatures up to 1200 K, where most the conventional TE materials based on alloys are often degraded over the time. In this report, oxide TE materials of p­type Ca3Co4O9, n­types ZnAlO, and CaMn0.95Nb0.05O3 were used to fabricate high temperature TE segmented modules. These oxide materials were prepared by solid­state reaction, followed by a spark plasma sintering technique, and their thermoelectric properties were characterized from 300 to 1200 K. The module performance was first investigated by numerical modeling using the experimental thermoelectric properties data as input parameters. In these calculations, the power generation characteristics were investigated in terms of various n-­leg selections (ZnAlO, CaMn0.95Nb0.05O3, and segmented ZnAlO/CaMn0.95Nb0.05O3), while the p-leg Ca3Co4O9 was fixed. Based on the model predication, several modules were fabricated, tested, and compared again with the theoretical calculations. The obtained results are discussed in details and also compared with other reported oxide modules.

Original languageEnglish
Publication date2012
Publication statusPublished - 2012
Event6th International Workshop on Advanced Materials Science and Nanotechnology - Bai Chay, Ha Long City, Viet Nam
Duration: 30 Oct 20122 Nov 2012
Conference number: 6
http://iwamsn2012.ac.vn/

Workshop

Workshop6th International Workshop on Advanced Materials Science and Nanotechnology
Number6
LocationBai Chay
CountryViet Nam
CityHa Long City
Period30/10/201202/11/2012
Internet address

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