掺稀土硅基光学材料的设计、植被和性能研究

Inner Mongolia is rich rare earth resources. Its proven resources of rare earth occupies the dominant position in the world. Among the mang application, the application of rare earth in new materials has been growing rapidly and been featured with high added values. When added in materials, rare earth either improves the quality of the material, or creates totally new materials. Therefore rare earth has been closely related with the contemporary science and technology. The special properties of rare earth in magnetism, luminescence and electronics have become the base for scientists to realize their dreams. Therefore, rare earth and hige-technology becomes a pair of twin brothers.The content of project is to prepare silica glasses containing rare earth elements by using sol-gel technique, to study the hast matrix effect to luminescence properties of rare earth ions, and lay a theoretical foundation for application of material in special silica fiber. Si is a promising light emitting material, doped rare earth in si material has proved to be highly effective for light emission, because rare earth elements posses good luminescence characteristics. Novel special doped rate earth elememts silica material could be prepared to combine them. It is well know that the luminescence properties of rare earth ions are strongly related to their chemical and structural environment inside the hast matrix. The mechanical and optical properties of silica glass made by conventional techniques are generally poor due to crystallization and inhomogeneous dope. So the use of silica glass doped rare earth ions is limited in the application.Eu and Tb-doped SiO2 material were synthesized and studied. The result show that the host matrix mainly affect on luminescence intensity, no effect on position of main peaks. When B was doped, the preparation of optical fibers is easy, creasing mechanical intensity of the optical fiber. When P was doped, UV photosensitivity and thermal sensitivity increased, but the preparation of optical fiber is no good.

本项目是充分利用内蒙古自治区的稀土资源优势，通过控制硅原子在基质中的排列和组成，引入稀土元素形成稀土发光中心或掺入其它元素形成等电子缺陷发光中心，制备以硅为基质的发光材料，研究材料的组成、结构、形态、相变等与发光性质的关系，为材料在光纤通信方面的应用提供理论基础，化资源优势为经济优势，促进我区稀土产业的发展。