Final rept., 1 Jan 1960-30 Sep 1961
OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
Pagination or Media Count:
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.
- Electricity and Magnetism