The reporter learned on the 25th from the Shanghai Jiaotong University Baotou Material Research Institute Saifel New Materials Co., Ltd. that the pilot project of the rare earth modified high purity sapphire raw material independently developed by the R & D team of the School of Materials Science and Engineering at Shanghai Jiaotong University was officially put into production, the first production line Output 5N (purity greater than 99.999%) high-purity alumina products. High-purity alumina is the high-end product of the aluminum industry and the main raw material of artificial sapphire. The new project makes up the gap in the international rare earth high-purity aluminum preparation technology, and will also enable the high-purity aluminum industry chain and artificial sapphire industry chain to be fully connected.
The R & D team has the first domestic ultra-high purity aluminum purification process and equipment with completely independent intellectual property rights. The team leader Professor Zhang Jiao said that the new technology perfectly combines the purification process of high-purity alumina and the preparation technology of new rare earth materials. After adding rare earth, the product has not only greatly improved its toughness, but also achieved color brightness and hardness. Greatly improved, it is now possible to prepare 6N ultra-high purity aluminum ingots and large-scale production of 5N ultra-high purity aluminum ingots, which has laid a solid foundation for the mass production of ultra-high purity alumina raw materials in China.
It is understood that high-purity alumina prepared by hydrolysis of high-purity aluminum with a purity of more than 5N is the main raw material for the production of sapphire single wafers for LED substrates. More than 90% of LED companies worldwide use sapphire as the substrate material. In addition, high-purity alumina is also widely used in lithium battery separator materials, high-end phosphors, catalysts, semiconductor ceramics, etc.
Pan Tianlong, general manager of Saifel New Materials Co., Ltd., said: "This new product was not previously available on the market. Our ultra-high purity aluminum ingots filled the gap in this production technology. Our upstream is the industry of the aluminum industry. The downstream of the chain is the industrial chain of artificial sapphire crystals. This new product for the first time realizes the seamless connection of the two industrial chains in China. Next, we will gradually push our products to mobile phone screens, camera lenses, and high-end ceramic targets. And other production and application fields. "(Li Xuefei reporter Zhang Jingyang)
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