A kind of composite polishing liquid for blue glass filter and preparation method thereof

Abstract

The invention discloses a composite polishing solution for blue glass filters and a preparation method thereof. The composite polishing solution includes aluminum hydroxide, zirconium hydroxide and silica sol, liquid caustic soda, surfactant, defoaming agent and water. The preparation method adopts aluminum hydroxide, zirconium hydroxide and silica sol through high-energy ball milling, drying granulation, calcining, high-energy ball milling, and high-energy dispersion to form dispersed materials, and then adds liquid caustic soda, surfactants, defoamers and water to make a stable composite polishing liquid system, the composite polishing liquid disclosed by the invention realizes the cutting rate of rough polishing and the surface quality of fine polishing while polishing in one step, the process is simple, the cost is saved, and the discharge of cleaning agent sewage can be reduced. Has very good environmental benefits.

Description

Technical field [0001] The present invention relates to a glass polishing liquid, and more particularly to a composite polishing liquid for a blue glass filter and a preparation method thereof. Background technique [0002] Blue glass infrared cut filter is widely used in high-pixel mobile phone camera modules, monitors digital imaging areas such as lenses, and is used to block infrared light on CCS / CMOS imaging, eliminate ghosts and spot. Compared to ordinary white glass infrared cutoff filters, the use of blue glass filter is more clear, and the photosensitive effective angle can reach 30 °. [0003] Blue glass is a blue glass material as a raw material (ordinary filter is general optical glass), and its efficacy is to filter infrared light by "absorbing". Since the blue wavelength has a higher penetration rate, there is better penetration than the red orange glass filter, which can be filtered with an infrared light of 630 nm or more (but allowed to pass the remaining light ...

AI Technical Summary

Problems solved by technology

Generally, a flat double-sided polishing machine is used for polishing. Since the Mohs hardness of rare earth oxides is usually between 4-6, and the hardness of blue glass is between 5-7, the processing is time-consuming and material-intensive, and because it is a two-step method, It needs to be fully cleaned in the middle, resulting in a very low pass rate of blue glass processing, and the investment in the machine is also expensive.

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