Thermal Conductivity Standard Reference Materials from 4 to 300 K. I. ARMCO IRON
Abstract
Thermal conductivity, electrical resistivity, Lorenz ratio, and thermopower data are reported for several specimens of Armco iron for temperatures from 4 to 300 K. At low temperatures the electrical resistivity and thermal conductivity vary from specimen to specimen by more than 10%. However, the Lorenz ratios of these specimens differ by less than 1.5%; and the intrinsic resistivities calculated using Matthiessen's rule differ by less than 0.2% of the total resistivities. Thus, Armco iron specimens can be used as standards by measuring the residual resistivities and utilizing the Lorenz ratio reported here.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1969
- Accession Number
- ADA382103
Entities
People
- J. G. Hust
Organizations
- National Institute of Standards and Technology