Abstract
The effects of plasma sprayed Al2O3, TiO2, and Al2O3-TiO2 coatings on surface properties and far infrared radiation were investigated by observation of surface roughness, measurement of relative reflection density, conductivity of the coatings, and the spectral energy distribution at wavelengths of 1.4∼14μm at 227°C. Increasing the TiO2 content of plasma-sprayed Al2O3-TiO2 coatings smoothed the surface, darkened the color of the coating, and resulted in semi conductivity and high far infrared radiation. Radiation energy increased with darkening of coating color.
