54 巻 (1988) 503 号 p. 1820-1825
The vaporization behavior of a single droplet impinging on a heated surface which was coated with ceramics such as alumina, magnesium zirconate and zirconium oxide was studied. This is the extension of the previous study on a vaporizing droplet on a solid surface of ceramics. The lifetime curves for some pure liquids were measured at a surface temperature up to 1100 K. We observed in detail the vaporization process of a droplet using a 16 mm high-speed motion-picture camera and high-speed video camera. It should be stressed that the ceramic-coated surface brought a wide temperature range yielding minimum vaporization times and short lifetimes in spite of its thinly coated layer, owing to its low-thermal conductivity and characteristic surface.