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Conference paper

The Influence of Spark Plasma Sintering Temperature on the Microstructure and the Thermoelectric Properties of Al, Ga dually-doped ZnO

In Proceedings of the 31st International and 10th European Conference on Thermoelectrics — 2012

By Han, Li1,2; Le, Thanh Hung1,2; Van Nong, Ngo1,2; Pryds, Nini1,2; Linderoth, Søren1,3

From

Department of Energy Conversion and Storage, Technical University of Denmark1

Electrofunctional materials, Department of Energy Conversion and Storage, Technical University of Denmark2

Management, Department of Energy Conversion and Storage, Technical University of Denmark3

Al, Ga dually-doped ZnO was prepared by spark plasma sintering with different sintering temperatures. The microstructural evolution and thermoelectric properties of the samples were investigated in detail. The samples with a sintering temperature above 1223K obtained higher relative densities and better electrical properties compared with the sample sintered at 1073K.

These results were supported by solid-state-reaction completion rate which suggested that the sintering temperature above 1223K would be preferable for the complete solid state reaction of the samples. The sintering mechanism of ZnO particles and microstructure evolutions at different sintering temperatures were investigated by the simulation of the self-Joule-heating effect of the individual particles.

Language: English
Year: 2012
Proceedings: 31st International & 10th European Conference on Thermoelectrics
Types: Conference paper
ORCIDs: Han, Li , Le, Thanh Hung , Van Nong, Ngo , Pryds, Nini and Linderoth, Søren

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