Accession Number:

AD0274831

Title:

THERMOELECTRIC MATERIALS

Descriptive Note:

Final rept., 1 Jan 1960-30 Sep 1961

Corporate Author:

OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS

Report Date:

1961-09-30

Pagination or Media Count:

38.0

Abstract:

Difficulty was experienced in containing molten Na2O.V2O4.5V2O5, a highly corrosive fluid. The precision and reproducibility of all results were very low. Na2O.V2O4.5V2O5 is a thermoelectric material in the liquid state yielding a potential difference of 2500 microvoltsC referred to as Pt when O is circulated over the hot junction and the cold junction is sealed. When air is circulated over the hot junction and the cold junction is sealed, a maximum potential difference of 700 microvoltsC may be attained. As the difference in temperature between hot and cold junctions is decreased, the potential difference increases, rising to a maximum near a temperature difference of 40 deg C. A reducing atmosphere over the hot junction reduces the thermal emf, and, if sufficiently reducing, reverses the polarity an oxidizing atmosphere raises the emf, as compared with a neutral He atmosphere.

Subject Categories:

  • Electricity and Magnetism

Distribution Statement:

APPROVED FOR PUBLIC RELEASE