Author/Authors :
Aiza, M.M. Universiti Putra Malaysia - Faculty of Science - Applied Optics Laboratory,Department of Physics, Malaysia , Zaidan, A.W. Universiti Putra Malaysia - Faculty of Science - Applied Optics Laboratory, Department of Physics, Malaysia , Wan Mahmood, M.Y. Universiti Putra Malaysia - Faculty of Science - Applied Optics Laboratory, Department of Physics, Malaysia , Norfarezah, H.E. Universiti Putra Malaysia - Faculty of Science - Applied Optics Laboratory, Department of Physics, Malaysia
Abstract :
Thermal diffusivity is a measure of rapidity of heat propagation through a material. The property is important in the understanding of gas sensor performance. Photoflash technique was used to determine thermal diffusivity of SnO2-based materials with varying amount of CuO ranging from 10 to 50 mol%, at room temperature. The samples were made disc-shaped, 10 mm in diameter with thickness ranging from 2.4 to 2.8 mm. We found that the thermal diffusivity values of SnO2-CuO samples ranging from 6.21 to 7.51x10^-2 cm^2s^-1 were better than the reported thermal diffusivity value of pure SnO2 sample (1.45xl0^-2 cms^-1}. The thermal diffusivity behaviour was supported by results from XRD and SEM.
Keywords :
Photoflash technique , SnO2 , CuO , thermal diffusivity
