The platform research team developed a "method for recycling gallium waste sapphire substrate resources"

The sapphire substrate, which is usually used on the surface of the mobile phone panel and the surface of the advanced watch, has no recovery. The research team of the Environmental Engineering Department of the University of Taiwan, the University of Taiwan, developed "the method of recycling gallium waste sapphire substrate resources", grinding the waste Sapphire substrate, impregnating and dissolving, then filtering out liquid and solid. The body product is three oxidation of two aluminum, which can be used as a refractory brick and building material. In addition, the liquid part of the electrolysis, in addition to the production of high purity of gallium, the remaining electrolyte as long as the addition of solvent to adjust the value of acid and alkali, will be able to reuse the gallium precipitate compound, so that the abandoned sapphire substrate completely recovered. Professor Li Qinghua said that the hardness of the sapphire substrate is high and not easily scratched. It is often used in the sapphire substrate on the surface of the mobile phone panel and on the surface of the advanced watch. In addition, the sapphire substrate is plated with gallium and can be made into a LED blue chip. At present, about 80% LED using sapphire substrate, the waste product of the production process is "gallium waste sapphire substrate". The new waste from the development of the high-tech industry has not been well recycled. In order to avoid environmental pollution, he led the students to recycle the abandoned sapphire substrate. Metal gallium. Professor Li Qinghua further explained that "the method of recycling gallium waste sapphire substrate resources" is for the recovery of the waste derived from the blue light LED industrial process. At present, the metal gallium is about four thousand to five thousand yuan per kilogram at a market price, which can not only reduce environmental pollution, but also allow the price of high tech waste. Metal resources can be recycled and reused.