Effects of some rare earth oxides and/or SiO2 additions to a commercial ZrO2 paint for coating SiGe thermoelectric materials

The effects of some rare earth oxides (Y2O3, CeO2, Sm2O3 or Er2O3) and/or SiO2 additions to a commercial oxide paint (mainly ZrO2) were studied as coatings for SiGe thermoelectric materials. No spalling occurred in the samples prepared from coatings containing small amounts of Er2O3, SiO2 or both Ce...

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Published inJournal of materials science Vol. 24; no. 11; pp. 3837 - 3840
Main Authors AMANO, T, BEAUDRY, B. J, GSCHNEIDNER, K. A, LAABS, F. C
Format Journal Article
LanguageEnglish
Published Heidelberg Springer 01.11.1989
Subjects
Applied sciences
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Materials and auxiliary equipments used in energy engineering
Thermoelectric device
Coating material
Silicon Oxides
Germanium Silicon Alloys
Zinc Oxides
Adhesion
Lanthanide Oxides
Thermoelectric properties
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Summary:The effects of some rare earth oxides (Y2O3, CeO2, Sm2O3 or Er2O3) and/or SiO2 additions to a commercial oxide paint (mainly ZrO2) were studied as coatings for SiGe thermoelectric materials. No spalling occurred in the samples prepared from coatings containing small amounts of Er2O3, SiO2 or both CeO2 and SiO2 while heating for 1322 h at 1080 C in vacuum, and the sublimation of silicon and /or germanium was reduced significantly. The improvements imparted by these oxide additions to the commmercial oxide paint is thought to be due to decreased internal stress of the surface oxides. The addition of Y2O3 and Sm2O3 had a detrimental effect. 10 refs.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0022-2461
1573-4803
DOI:10.1007/BF01168944