Year: 2008
Type: article
Abstract: Skutterudite compounds, Sr y Co 4 Sb 12- x Ge x ( y =0.3, x =0–0.3), are synthesized by a melting method. The effect of germanium doping on thermoelectric properties is investigated. Electrical conductivity, Seebeck coefficient, and thermal conductivity are measured from 300 to 850 K. The substitution of germanium is effective in reducing thermal conductivity while keeping excellent electrical transport properties owing to the high filling fraction of Sr and Ge doping as charge compensation. The dimensionless thermoelectric figure of merit Z T is observed to increase from 0.9 at 850 K for Sr 0.28 Co 4 Sb 12 to 1.05 for Sr 0.34 Co 4 Sb 11.9 Ge 0.1 at 850 K. These results suggest that doping with germanium is an attractive avenue to optimization of filled skutterudites.
DOI: 10.1143/jjap.47.7470
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: bronze
Award: 原位生长法制备填充方钴矿基纳米复合材料及其热电性能研究
OpenAlex ID: W1650392945