Abstract
An infrared irradiation heating method has previously been proposed as a technique for directly estimating thermal shock parameters from an electric charge. In this method, a thin circular disk is irradiated with infrared rays over its central area at a constant heat flux. In this report, we analyzed the temperature/thermal stress distributions in the disk in relation to the temperature-dependent material properties of ceramics, namely the temperature distributions relating to temperature-dependent thermal conductivity and thermal diffusivity, and the thermal stress distributions relating to temperature-dependent thermal conductivity, thermal diffusivity and thermal expansion. The results reveal that these temperature-dependent properties yield marked effects on the temperature/stress distributions in the disk. A number of possibilities are suggested for decreasing thermal stresses in ceramic structures by selecting appropriate combinations of temperature-dependent properties.
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