The influence of ferroelastic domain formation on thermal conductivity in Li2TiGeO5 ceramics

Abstract

We show, through thermal conductivity coefficient measurements of Li 2 TiGeO 5 ceramics, that the anomaly associated with the ferroelastic phase transition can be distinguished. We correlate this anomaly with the measurement of the domain structure observed in the vicinity of phase transition temperature T c . Near the T c , the appearance of ferroelastic domains which become new scattering centers for thermal waves, strongly affect the thermal conductivity in Li 2 TiGeO 5 ceramics.

A role of intermolecular interaction modulating thermal diffusivity in organosuperelastic and organoferroelastic cocrystals

“…[45][46][47] It has been demonstrated that inorganic ferroelastic materials can be utilized for thermal management applications. 44,[48][49][50] Sieradzki et al studied the changes in the thermal conductivity of Li 2 -TiGeO 5 ceramics in the ferroelastic phase transition or domain formation. 50 Wang et al reported the difference in thermal conductivity values of layered PdSe 2 before and aer ferroelastic phase transition by uniaxial compression and demonstrated that the high ratio of the switchable thermal conductivity value between the two phases could be utilized for exibility and thermal management.…”

“…44,[48][49][50] Sieradzki et al studied the changes in the thermal conductivity of Li 2 -TiGeO 5 ceramics in the ferroelastic phase transition or domain formation. 50 Wang et al reported the difference in thermal conductivity values of layered PdSe 2 before and aer ferroelastic phase transition by uniaxial compression and demonstrated that the high ratio of the switchable thermal conductivity value between the two phases could be utilized for exibility and thermal management. 44 However, there is only one study concerning the measurement of anisotropic heat transport properties in a superelastic organic crystal due to the limited approaches/techniques to measure the thermal diffusivity of organic crystals.…”