Abstract
A new procedure to estimate diffusivity and thermal conductivity is developed by using a solution explicitly obtained from an inverse problem of one-dimensional unsteady heat conduction. This method has merit being independent of surface condition and is simpler than existing methods, which commonly use a direct heat conduction solution and are subject to a boundary condition. The thermal diffusivity is estimated by using a change in the temperatures including some error at two different points. The values estimated thereby are found to be in good agreement with that for the tested material.