With TiO
2-SiO
2 multi-layer film that transmits visible rays while reflecting infrared radiation, the energy consumption in incandescent lamps can be greatly reduced. This film is formed from organomet allic solutions by the dipping method.
In order to achieve the film whose properties meet the desired purposes (high refractive index, high visible transmittance, able to form a multi-layer coat, high heat resistance, etc.), the organometallic solution compositions and processing conditions had been investigated.
As a result, it was formed possible to deposit film in multi-layers, over 10 layers. In order to deposit titanium dioxide films, a chelated mixture of Tetra-Propoxy-Titanate polilner and monomer was found apPropriate, The refractive index of titanium dioxide films from this solutions is over 2. 1 (at 1, 000 nm), when baking temperature is over 600°C, and the heat resistance of this films is over 900°C.
Appling this multi-layer films to tubular tungsten halogen lamps, energy consumption can be reduced as much as 15%.
View full abstract