A solid state approach to the production of kilogram quantities of Si[sub 80]Ge[sub 20] thermoelectric alloys
An important consideration in the development of improved materials for thermal-to-electrical power generation is whether a research-scale process or methodology is amenable to production of kilogram quantities. Research efforts on the solid state technique of mechanical alloying have shown that both n- and p-type Si-20 at. % Ge alloys can be produced which have improved thermoelectric properties compared to state-of-the-art MOD-RTG materials. Studies on the production of large quantities of mechanically alloyed powder alloys using a planetary mill indicate that properties similar to those observed in alloys prepared in smaller quantities by a vibratory mill can be obtained. The characterization of several p-type alloys doped with 0.8 at. % B in the form SiB[sub 4] by X-ray diffraction, scanning laser mass spectroscopy, Hall effect, and high temperature electrical resistivity and Seebeck coefficient measurements are described. The transport properties of these alloys are shown to be comparable to those measured on similar samples prepared in small quantities by a research-grade vibratory mill.
- Research Organization:
- Ames Lab., IA (United States)
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-82
- OSTI ID:
- 6843849
- Report Number(s):
- IS-M-734; CONF-930103-28; ON: DE93004476
- Resource Relation:
- Conference: 10. symposium on space nuclear power and propulsion, Albuquerque, NM (United States), 10-14 Jan 1993
- Country of Publication:
- United States
- Language:
- English
Similar Records
A solid state approach to the production of kilogram quantities of Si[sub 80]Ge[sub 20] thermoelectric alloys
A solid state approach to the production of kilogram quantities of Si- 20 at.% Ge thermoelectric alloys
Related Subjects
36 MATERIALS SCIENCE
GERMANIUM ALLOYS
PRODUCTION
THERMOELECTRIC PROPERTIES
SILICON ALLOYS
THERMOELECTRIC MATERIALS
BORON ADDITIONS
DOPED MATERIALS
HALL EFFECT
P-TYPE CONDUCTORS
SILICON BORIDES
X-RAY DIFFRACTION
ALLOYS
BORIDES
BORON ALLOYS
BORON COMPOUNDS
COHERENT SCATTERING
DIFFRACTION
ELECTRICAL PROPERTIES
HALIDES
HALOGEN COMPOUNDS
MATERIALS
PHYSICAL PROPERTIES
SCATTERING
SEMICONDUCTOR MATERIALS
SILICON COMPOUNDS
SILICON HALIDES
NESDPS Office of Nuclear Energy Space and Defense Power Systems
300303* - Thermoelectric Generators- Materials
Components
& Auxiliaries
360101 - Metals & Alloys- Preparation & Fabrication
360104 - Metals & Alloys- Physical Properties