Lighting control light decay process

Lighting wants to achieve a more efficient progress in controlling the light decay of the lamp; for the light decay of the lighting, in addition to the use of perfect crystalline, complete crystals, smooth and clean surface, no impurity, uniform particles, the following are used The process technology can also reduce the light attenuation of the lighting tube: 　　1, the lighting should adopt a new formula powder coating process: For the rare earth three-base toner, a non-ionic polymer-polyethylene oxide should be used. Temporary binder for water slurry powder coating process. The binder has a relatively low decomposition temperature. It begins to decompose at 2000C. After reaching the decomposition temperature, it decomposes from the polymer into monomers, and these monomers run away in a gaseous manner. Therefore, the use of polyethylene oxide as a temporary adhesive for lighting decorations can ensure that the formed glass tube will be completely baked out of the adhesive during the tube baking stage, and the glass tube will not be deformed, which prevents the black light-absorbing film on the phosphor layer from being damaged. generate. 2. Lighting decorations should also use protective film technology: in order to prevent the blackening of the glass tube and the thermal diffusion of sodium ions in the glass to the phosphor layer, for high-tube wall-loaded lighting (tube inner diameter 10mm, current greater than 0.2A), use Protective film technology, that is, apply a layer of protective film before powder coating. There are two types of protective film, one is a transparent oxide protective film; the other is a light-transmitting aluminum oxide protective film. Production practice has proved that both protective films have protective effects. After adopting the protective film technology, the glass tube is no longer blackened due to the infiltration of mercury, the phosphor is no longer 'colored' due to the generation of sodium amalgam on its surface, and the 2000h and 5000h lumen maintenance rates of the lamp are greatly improved. 3. The lighting needs to optimize the baking tube, cathode coating and exhaust process: After using polyethylene oxide as the binder, the baking tube process specification of the powder tube should be formulated according to the thermal decomposition characteristics of the polyethylene oxide. In order to get the best binder-free powder layer. The exhaust should be matched with the pumping rate of the vacuum system to facilitate the formation of the barium tungstate intermediate layer. When exhausting, the baking temperature should be high, the time should be sufficient, and the purity of the inert gas should be high to ensure the lowest impurity gas pressure in the lamp tube and obtain good light decay characteristics.