On the 5th, I learned from Saifuer New Materials Co., Ltd. of Baotou Materials Research Institute of Shanghai Jiaotong University that the pilot project of rare earth modified high purity sapphire raw materials independently researched and developed by the research team of School of Materials Science and Engineering of Shanghai Jiaotong University was officially put into operation, and the production line was first produced. 5N (purity greater than 99.999%) high purity alumina product. High-purity alumina is the high-end product of the aluminum industry and the main raw material of artificial sapphire. The new project has made up for the blank of the international rare earth high-purity aluminum preparation technology, and will also make the high-purity aluminum industrial chain and the artificial sapphire industrial chain realize the whole line.