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- Title
Protective enamel coating for n- and p-type skutterudite thermoelectric materials.
- Authors
Park, Young-Sam; Thompson, Travis; Kim, Yunsung; Salvador, James; Sakamoto, Jeffrey
- Abstract
Transitioning skutterudite (SKD) thermoelectric technology from space to terrestrial power generation requires oxidation suppression technology. One approach involves the development of protective coatings consisting of the following properties: (i) low thermal conductivity to prevent parasitic heat loss, (ii) low electrical conductivity to prevent short-circuiting, (iii) coefficient(s) of thermal expansion matching that of the thermoelectric material, and (iv) adequate thermal stability and mechanical strength for durability. In this work, n-type BaYbCoSb and p-type CeCoFeSb were coated with a silica-based enamel to prevent their oxidation. This work demonstrates the efficacy of enamel coatings for suppressing oxidation of n-type SKD, and for the first time, p-type SKD in static and thermal cyclic heating tests up to 600 °C in air. The coating process, physical characterization of the enamel, and materials characterization data are presented and discussed.
- Subjects
SKUTTERUDITE; THERMOELECTRICITY; ELECTRIC power production research; THERMAL conductivity; ELECTRIC conductivity research
- Publication
Journal of Materials Science, 2015, Vol 50, Issue 3, p1500
- ISSN
0022-2461
- Publication type
Article
- DOI
10.1007/s10853-014-8711-4