NUCLEAR MMAGNETIC RESONANCE IN BORON TRIOXIDE AT ELEVATED TEMPERATURES,
Abstract
The magnetic resonance of the B11 nucleus in vitreous boron trioxide was observed at 10 Mcps and at temperatures ranging from room temperature to 800C. The resonance line narrows with increasing temperature to about 600C, above which it broadens again. The narrowing below the glass-transition temperature T sub g is attributed to lattice vibrations; that above T sub g, to molecular rotation. The broadening above 600C is ascribed to the decrease in the life time of the energy states. Theory is given relating the line width to the molecular motion of the liquid. There is no evidence for a proposed change in molecular structure. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 15, 1965
- Accession Number
- AD0612384
Entities
People
- James C. Mcdade
Organizations
- Harry Diamond Laboratories