The Kinetics, Stability and Thermal Contact Resistance of Nickel-Ca3Co4O9 Interfaces Formed by Spark Plasma Sintering

Tim Holgate, NingYu Wu, M. Søndergaard, B.B. Iversen, Ngo Van Nong, Nini Pryds

Research output: Chapter in Book/Report/Conference proceedingConference abstract in proceedingsResearch

Abstract

Incorporating oxide thermoelectric (TE) materials in TE power generation modules necessitates the study of the interfaces between the oxide TE elements and the interconnect materials used to deliver current between them. In this study, interfaces between pure nickel and undoped calcium cobaltate (Ca3Co4O9) have been formed directly by spark plasma sintering (SPS). An intermediate NiO phase is formed during the SPS processes, which grows during post heating with Co entering from the cobaltate side to form a graded Ni1-xCoxO interfacial layer. The electrical and thermal transport across these interfaces, as well as the long term chemical stability of the intermediate layers, have been studied and are discussed herein.
Original languageEnglish
Title of host publicationProceedings of 31st International and 10th European Conference on Thermoelectrics
Publication date2012
Publication statusPublished - 2012
Event31st International & 10th European Conference on Thermoelectrics - Nordkraft, Aalborg, Denmark
Duration: 9 Jul 201212 Jul 2012
Conference number: 31 / 10
http://www.ict2012.its.org/

Conference

Conference31st International & 10th European Conference on Thermoelectrics
Number31 / 10
LocationNordkraft
CountryDenmark
CityAalborg
Period09/07/201212/07/2012
Internet address

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