Influence of Grain Size on the Thermal Diffusivity of Pt-SnO2 Ceramic

Pt-SnO2 ceramics were prepared via solid-state route from a mixture of powders of (100-x) SnO2.x Pt (0≤ x wt %≤ 1). The samples were then sintered at 600, 800 and 1000 °C for 3 hours. The resulting samples were then characterized using Laser Flash Apparatus (LFA) for determining thermal diffusivity (α ) value. The measurements of α were carried out at room temperature up to 400 °C with the intervals of 50 °C. Experimental results showed that thermal diffusivity value is in the range of 5.0×10-7m2s-1 - 3.0×10-6m2s-1. We also show that larger grain size increases the thermal diffusivity of the ceramic. Data concerning the effects of additive amount, pore content, and temperature were also reported.