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Title MATERIALS FOR THERMOELECTRIC GENERATORS. Final Report
Creator/Author Miller, E. ; Ermanis, F. ; Cadoff, I.
Publication Date1961 Jul 01
OSTI IdentifierOSTI ID: 4814750
Report Number(s)AFCRL-850;AD-264375; AD-264375
Resource TypeTechnical Report
Research OrgNew York Univ., New York. Coll. of Engineering
SubjectMETALS, CERAMICS, AND OTHER MATERIALS; ABSORPTION;ANISOTROPY;ANTIMONY ALLOYS;CADMIUM ALLOYS;ELECTRIC CONDUCTIVITY; GENERATORS;HALL EFFECT;INFRARED RADIATION;INTERMETALLIC COMPOUNDS;MONOCRYSTALS; TEMPERATURE;THERMOELECTRICITY;ANTIMONY ALLOYS;GENERATORS;INTERMETALLIC COMPOUNDS; PREPARATION;THERMOELECTRICITY;ZINC ALLOYS;ANTIMONY ALLOYS;CADMIUM ALLOYS; EUTECTICS;GENERATORS;INTERMETALLIC COMPOUNDS;THERMOELECTRICITY;ZINC ALLOYS
Description/Abstract The solidification and electronic characteristics of CdSb, ZnSb, and alloys of the system Zn/sub x/,Cd/(sub 1-x)/Sb were studied for application to thermoelectric devices. Complex phase relations limited the study of ZnSb which could not readily be prepared in single phase form. CdSb single crystals were prepared and pertinent electronic data were obtained. Infrared absorption in the <100> direction of single crystal samples of CdSb gave a value for the energy gap at room temperature for indirect transitions of 0.45 ev with a temperature variation of -6 x 10/sup -4/ev/ deg K. From resistivity, Hall coefficient, and Seebeck coefficient data, the energy gap at 0 deg K was calculated to be 0.57 ev the mobility ratio 0.9, and the hole effective mass was found to increase with temperature from 0.2 to 0.38 between 100 deg K and 300 deg K. The conductivity was found to be anisotropic, the three principal conductivities being the ratio sigma /sub 010/: sigma /sub 100/: sigma /sub 001/ = 1.45: 1.00. The phase relations between ZnSb and CdSb also showed metastable-stable reactions. In the metastable system the section Zn/sub x/Cd/sub(1-x)/ Sb showed a eutectic at about Zn/sub 0.1/:Cd/sub 0.9/Sb. No eutectic was observed in the stable but complete miscibility of ZnSb and CdSb was not definitely observed. (auth)
LanguageEnglish
FormatPages: 30
System Entry Date2001 Jun 03

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