THERMOELECTRIC POWER OF DILUTE INDIUM-LEAD AND INDIUM-THALLIUM ALLOYS

Journal Article · Fri Aug 01 04:00:00 EDT 1958 · Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D

DOI:https://doi.org/10.1103/PhysRev.111.757· OSTI ID:4294294

Tomasch, W J; Reitz, J R

An earlier investigation of the thermoelectric power of dilute ( alpha - phase) indium-lead alloys, measured relative to pure indium, indicated that there is detailed structure superimposed on the smooth trend of the data. This investigation is now extended to include some twenty-two indium-lead alloys as well as thirteen indium-thallium alloys. For the indium-lead alloys, the existence of structure at beth 273 rnd 77 deg K is reaffirmed. On the other hand, the thermoelectric power of the indium-thallium system is found to be an extremely smooth function of the composition in the same range of solute concentration. As a consequence, it is concluded that the observed structure in indium-lead is due exclusively to changes in electronic concentration brought about by alloying. An estimate of the pure electronic concentration contribution to the thermoelectric power is obtained by subtracting the indiunn-thallium data from the corresponding indium-lead data. The results of this procedure are demonstrated to be in qualitative agreement with the predictions of a band-model theory which is developed for this comparison. It is therefore suggested that the observed structure can be attributed to the extinction of bands of electron holes and the initiation of bands of overlap electrons. Furthermore, as the result of comparing the thermoelectric data with lattice spacing information, definite suggestions are made concerning the band configuration of pure indium and the evolution of said configuration with alloying. Finally, a very qualitative explanation is offered for the novel face-centered tetragonal (c/a> 1) to face-centered tetragonal (c/a < 1) phase transformation which occurs at the alpha -phase solubility limit. (auth)

• Research Organization: Case Inst. of Tech., Cleveland
• NSA Number: NSA-12-017470
• OSTI ID: 4294294
• Journal Information: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, Journal Name: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D Vol. Vol: 111; ISSN PHRVA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

CONFIGURATION
ELECTRONS
ENERGY LEVELS
INDIUM
INDIUM ALLOYS
INTERMETALLIC COMPOUNDS
LEAD ALLOYS
PHASE DIAGRAMS
PHYSICS
POWER
SOLUBILITY
THALLIUM ALLOYS
THERMOELECTRICITY