Filled Skutterudite Antimonides: A New Class of Thermoelectric Materials

American Association for the Advancement of Science (AAAS) - Tập 272 Số 5266 - Trang 1325-1328 - 1996
B. C. Sales1, David Mandrus1, R. K. Williams2
1B. C. Sales and D. Mandrus, Solid State Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA.
2R. K. Williams, Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA.

Tóm tắt

A class of thermoelectric materials has been synthesized with a thermoelectric figure of merit ZT (where T is temperature and Z is a function of thermopower, electrical resistivity, and thermal conductivity) near 1 at 800 kelvin. Although these materials have not been optimized, this value is comparable to the best ZT values obtained for any previously studied thermoelectric material. Calculations indicate that the optimized material should have ZT values of 1.4. These ternary semiconductors have the general formula RM 4 X 12 (where R is lanthanum, cerium, praseodymium, neodymium, or europium; M is iron, ruthenium, or osmium; and X is phosphorus, arsenic, or antimony) and represent a new approach to creating improved thermoelectric materials. Several alloys in the composition range CeFe 4− x Co x Sb 12 or LaFe 4− x Co x Sb 12 (0 < x < 4) have large values of ZT .

Từ khóa


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American Association for the Advancement of Science (AAAS)

Tập 272 Số 5266

1325-1328

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