The Density, Electrical Resistivity and Hall Coefficient of Li-B Alloys.
Abstract
The density, electrical resistivity, and Hall constant of LiB Alloys in the concentration range 0-60 at % B are reported. An analysis of the measured density of the LiB reveals that in the composition range 0-40 at % B most of the B is present in a Li-rich phase, probably Li5B4. The electrical resistivity at room temperature was roughly constant between 0 and 45 at % B and then started to rise rapidly with increasing B. The Hall coefficient at room temperature was fairly constant from 0 to 40 at % B and then started to rise. The temperature dependence and magnitude of the electrical resistivity were metallic in nature, and there was no evidence of semiconducting behavior at higher B concentrations. There was a break in the resistivity of the 40 at % B sample at the melting point of Li indicating the presence of free Li, but not in the 50 to 60 at % B samples. It was possible to calculate the stoichiometry and density of the LiB phase (or phases) present in the 40 at % B sample: 55.3 at % Li and 1.07 g/cm cc, respectively, very close to the 55.6 at % Li and 1.0537 g/cm cc calculated for Li5B4 predicted from a recent x-ray and neutron diffraction structure study by Wang, et. al.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 23, 1977
- Accession Number
- ADA048064
Entities
People
- M. A. Mitchell
- R. A. Sutula
Organizations
- Naval Ordnance Laboratory