Thermal conductivities of Li, Na, K, and Ag β -alumina below 300 K

作者：Phillip J. Anthony, Andrew C Anderson · 发表于：Physical review. B, Solid state · 年份：1976 · DOI：10.1103/physrevb.14.5198 · 被引用次数：54 · 研究领域：Thermal properties of materials、Ferroelectric and Piezoelectric Materials、Thermal Expansion and Ionic Conductivity

The thermal conductivities of single-crystal Li, Na, K, and Ag $\ensuremath{\beta}$-alumina have been measured in the temperature range of $\ensuremath{\approx}0.1\ensuremath{-}300$ K. The thermal conductivity is very sensitive to the cation present and is indicative of a broad band of excitations ($\ensuremath{\lesssim}{10}^{\ensuremath{-}21}$J, $\ensuremath{\lesssim}{10}^{12}$ Hz) which scatter thermal phonons. The results are compared with a tunneling-states theory of disordered materials and with published data from specific-heat and light-scattering measurements.