초음파 분사 열분해 장치에서 제조된 TiO2/SiO2 복합 분체의 UV 차단 효과

UV Blocking Effect of TiO2/SiO2 Composite Powders Prepared by Ultrasonic Spray Pyrolysis

The silica nanoparticles were used as support of catalyst, filling material, electronic assembler, thin film material, and sensor material. And, the titania nanoparticles were used as pigment, dielectric substance, sensor and photocatalyst. In this paper, the spherical composite particles of TiO2/SiO2 with narrow size distribution and phase pure were synthesized by ultrasonic spray pyrolysis method from TiOSO4 and colloidal silica solution. Using ultrasonic apparatus, this starting solution was vaporized to droplets, and these droplets were induced into tube furnace by carrier gas. The resulting composite powder was characterized by scanning electron microscopy, X-ray diffraction analysis, TG-DTA, in vitro sun protection factor(SPF) and BET surface area analysis.