Electrical and Thermal Transport Property Studies of High-Temperature Thermoelectric Materials.
Abstract
The first year of this research emphasized the study of electronically conducting oxides with varied transport characteristics, an evaluation of theoretical models, and the determination of a high-temperature transport property data base. Oxide systems based on SnO2-In2O3, (La, Y) (Mg,Ca,Sr) CrO3, HfO2-RxOy-In3O3 and La(Sr)MnO3 were selected for initial studies and represent different crystallographic/defect structures and transport characteristics. The electrical conductivity, Seeback coefficient and thermal conductivity for these oxides are being measured and have provided a preliminary data base for evaluating transport properties and the figure of merit. The purpose of this report is to describe the technical results obtained during the first year's study of high-temperature thermoelectric materials. The scope of the research is (a) to develop theoretical models for electrical, thermal, and thermoelectric behavior of refactory oxide materials, (b) to determine electrical transport properties necessary to develop and test these models, (c) to determine methods for increasing the figure of merit in refractory oxide systems by varying compositon, defect structure. microstructure, etc., and (d) to use these models to establish theoretical and empirical limits of the figure of merit for these oxides and other refractory materials.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1984
- Accession Number
- ADA150167
Entities
People
- C. W. Griffin
- J. E. Garnier
- J. L. Bates
- L. C. Olsen