open access

https://hdl.handle.net/2115/77071

Thermoelectric Properties of Combustion-Synthesized Lanthanum-Doped Strontium Titanate

英語

combustion synthesis

2007-05-01

日本金属学会

MATERIALS TRANSACTIONS

48(5)

1079-1083

The possibility of combustion synthesis of perovskite-oxide thermoelectric materials with the attendant saving of energy and time and without deterioration in the thermoelectric properties was investigated by evaluating the thermoelectric properties of lanthanum-doped strontium titanate (Sr1−xLaxTiO3, 0≤x≤0.1). The materials were successfully combustion synthesized and spark plasma sintered with 98.0–99.6% of true density, and their thermoelectric properties were evaluated from room temperature to 850 K. The optimal lanthanum doping amount ratio x in the considered temperature range was from 0.06 to 0.08, in which Sr0.92La0.08TiO3 sample showed the maximum ZT of 0.22 at 800 K. This value was close to the highest recorded ZT at the same temperature up to now, and the ZT of most samples are higher than those synthesized by the conventional solid state reaction method. Thus, combustion synthesis is promising for producing perovskite-oxide thermoelectric materials for high-temperature application.

学術雑誌論文

Version of Record

1345-9678

1347-5320

AA1151294X