Thermoelectric properties of non-stoichiometric lanthanum sulfidesThe lanthanum sulfides are promising candidate materials for high-efficiency thermoelectric applications at temperatures up to 1300 C. The non-stoichiometric lanthanum sulfides (LaS(x), where x is in the range 1.33-1.50) appear to possess the most favorable thermoelectric properties. The Seebeck coefficient and resistivity vary significantly with composition, so that an optimum value of alpha sq/rho (where alpha is the Seebeck coefficient and rho is the resistivity) can be chosen. The thermal conductivity remains approximately constant with stoichiometry, so a material with an optimum value of alpha sq/rho should possess the optimum figure-of-merit. Data for the Seebeck coefficient and electrical resistivity of non-stoichiometric lanthanum sulfides will be pressed, together with structural properties of these materials.
Document ID
19840047258
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Shapiro, E. (Thermo Electron Corp. Waltham, MA, United States)
Danielson, L. R. (Thermo Electron Corp. Waltham, MA, United States)