Thermal properties of Ca-doped stabilized zirconia under high pressure and high temperature

The thermal diffusivity, kappa, and conductivity, lambda, of Ca-doped stabilized zirconia were simultaneously measured up to 5.3 GPa and 700 K employing the pulse transient method. From kappa and lambda, heat capacity, C, was also derived. The temperature dependences of kappa and lambda at 5.3 GPa were found to be very small, and may be due to oxygen ion conduction. The present data are especially useful for designing a high-pressure cell in a Kawai-type apparatus, where Ca-doped stabilized zirconia has been frequently used as thermal insulator around a heater. (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.