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Thermoelectric Properties of Solution Combustion Synthesized Al-Doped ZnO
Title: | Thermoelectric Properties of Solution Combustion Synthesized Al-Doped ZnO |
Authors: | Zhang, Lihua Browse this author →KAKEN DB | Tosho, Tsuyoshi Browse this author | Okinaka, Noriyuki Browse this author →KAKEN DB | Akiyama, Tomohiro Browse this author →KAKEN DB |
Keywords: | thermoelectric materials | zinc oxide | solution combustion synthesis | planetary ball milling | thermal conductivity |
Issue Date: | 1-Dec-2008 |
Publisher: | The Japan Institute of Metals |
Journal Title: | MATERIALS TRANSACTIONS |
Volume: | 49 |
Issue: | 12 |
Start Page: | 2868 |
End Page: | 2874 |
Publisher DOI: | 10.2320/matertrans.MAW200801 |
Abstract: | Thermoelectric properties of Al-doped ZnO prepared by solution combustion synthesis using urea as fuel and sintered by spark plasma sintering were investigated for developing an energy- and time-saving synthesis method to decrease its thermal conductivity without a significant deterioration in other thermoelectric properties. The desired materials were successfully synthesized and sintered. The thermoelectric properties of the synthesized products subjected to planetary ball milling (PBM) treatment before sintering were compared with those of synthesized products not subjected to PBM treatment; the results showed that the former products had a larger power factor and higher thermal conductivity than the latter products. The thermal conductivity of all as-synthesized products was in the range of 8.3–19.7 W·m−1·K−1 at room temperature, which was significantly lower than that of the products synthesized by a conventional solid-state reaction method. (Zn0.99Al0.01)O obtained by PBM had the highest dimensionless figure of merit ZT of 0.050 at 863 K. From these results, it is inferred that solution combustion synthesis is an effective method for synthesizing Al-doped ZnO with relatively low thermal conductivity for high-temperature thermoelectric applications. |
Type: | article |
URI: | http://hdl.handle.net/2115/77069 |
Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 張 麗華
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