THERMOELECTRIC PROPERTIES OF SELENIDES AND TELLURIDES OF GROUPS VB AND VIB METALS AND THEIR SOLID SOLUTIONS
Abstract
Calculations were made of idealized efficiencies for various operating conditions and geometries of thermoelectric modules with segmented elements of Ta-doped WSe2 in combination with Na-doped PbTe, encapsulated in constantan cylinders serving as the n-type element. These calcula tions followed a 704-Computer program developed in another organization. An efficiency of 9.6% was calculated for the combination W0.98Ta0.02Se2 and PbTe 0.3 at .% Na operating in the gradient 1000 to 25 C. The power per unit volume is 0.47 w/cc compared with 0.19 w/cc for PbTe based modules. Studies of improved preparative techniques for the diselenides were continued, and doped lead telluride specimens were obtained for assembly into test modules for direct experi mental measurement of efficiencies in an appara tus now completed. Observations on the thermal decomposition of WSe2 indicate a measurable pressure of Se at 400, which remains considerably below 1 atm at 100 C.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 31, 1963
- Accession Number
- AD0406693
Entities
People
- H. Valdsaar
- W. T. Hicks