STABLE DENSE COLD PLASMA.
Abstract
It was established tha sodium-ammonia solutions exist as stable dense gaseous plasmas at temperatures above 135 C. These electronically-conducting gaseous solutions have been produced by dissolving metallic sodium in dense gaseous ammonia at 130 to 190 C. The solutions, contained in glass, are under equilibrium with respect to mobile electrons, but metastable with respect to chemical oxidation. Useful lifetimes of an hour have been obtained before chemical reactions destroy the electronic character of the solutions. When concentrated, these gases have metallic reflectivity and are copper-gold colored, and in the less concentrated states are opaque, dark-colored. The studies of the principal physical chemical properties of sodium-ammonia solutions included measurements of electrical conductivity over an extended temperature range (-60 to +190 C), density (-60 to +60), Hall coefficient, magnetic susceptibility, chemical stability, and reflection and transmission spectra (-40 to +20). These studies, where indicated, have been made over extended temperature ranges and required the development of an extensive new technology. This technology included making highly pure sodium-ammonia solutions, refining inductive conductivity measuring techniques, developing precision glass blowing and evaluating glass cleaning methods. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1966
- Accession Number
- AD0479463
Entities
People
- S. Naiditch