Thermal conductivity of pressure-induced recrystallized KCl

Publisher Website
Google Scholar
Abstract
The thermal conductivities of four specimens of pressure‐induced recrystallized (PIR) KCl have been measured between 1.8 and 90°K. At the lowest temperatures, the conductivities of these compressively deformed specimens are lower than the single‐crystal conductivity by as much as one order of magnitude. The reductions in conductivity for PIR KCl specimens are much smaller than are observed in hot‐pressed CdS and MgF2 which have similar microstructures with large dislocation densities. Above T=50°K, the thermal conductivity for all the PIR samples is identical to the single crystal. Specific‐heat measurements on one of the PIR specimens at 1.5 ≤T≤20°K are in excellent agreement with measurements on single crystals.