新疆天然方钠石发光特性及其应用研究

Noticing a geographical advantage of extremely rich silicate mineral resources in Xinjiang, we research systemically luminescence properties of natural sodalite from Xinjiang by means of research methods of luminescence science, material science and mineralogy. Using a powder X-ray diffraction (XRD) system, an electron probe microanalyzer (EPMA), an inductively coupled plasma-optical emission spectrometer (ICP-OES) and a steady state & Fluorescence Lifetime spectrometer, time-resolved fluorescence spectrometer, absorption spectrum, Raman spectroscopy and infrared spectroscopy analysis ,we reveal some important physical and chemical characters of sodalite, such as components and structures, species and valence of trace elements, origins of luminescence, kinds of luminescent center, defects in crystal, energy-band structure and models of energy transfer, and reveal the luminescence mechanism. By doping various activators into natural sodalite as host crystal, and eliminating quenchers by heat treatment, we improve application value of natural luminescent minerals. We prepare luminescent materials with high luminance efficiency and environment protection, resulting from investigation on luminescence properties of sodalite. Therefore, we offer theoretical basis and technical idea for developing and researching new luminescent materials. This research project conforms to the state's strategy of implementing the development of the western regions. By employing the advantage of rich nonmetallic mineral resources in Xinjiang, we can utilize the resources to development of industry in Xinjiang. Results obtained from this research will give a good prospect in application to new luminescent materials.

本项目结合新疆硅酸盐矿物资源极为丰富的地缘优势, 用发光学、材料学和矿物学的研究方法，对新疆各地方钠石矿石的独特发光特性其应用探索进行系统研究。通过XRD、电子探针、ICP-OES、稳态/瞬态荧光光谱、时间分辨荧光光谱仪、吸收谱、拉曼谱、红外光谱等研究手段,揭示新疆各地各类方钠石的结构和成分、微量元素种类和价态、发光起因、发光中心种类、能带结构、能量传递的方式等重要的物理和化学性质，并进一步揭示其发光机理。以天然方钠石作基质晶体，去除猝灭剂，通过掺杂合适的激活剂、进行热处理等研究手段，提高天然方钠石的发光效率，实现其实际应用。依据方钠石的结构成份及其发光性能研究，研制出高亮度、高效率、环保的发光材料，为探索新基质的发光材料提供理论基础和技术路线。该研究项目，符合国家实施西部大开发战略，有利于发挥新疆非金属矿物资源优势，使新疆资源优势转化为产业优势，研究成果在发光材料领域具有很好的应用前景。

本项目，结合新疆方钠石资源极为丰富的地缘优势, 用发光学、材料学和矿物学的交叉研究方法，对新疆各地方钠石的独特光致发光特性其应用进行了系统研究。通过掺杂激活剂、热处理等手段提高了天然方钠石的发光性能，相应制备出各种方钠石结构发光材料。其中①研究了新疆天然方钠石，并进行热处理改进其发光性能。揭示了其Mn2+、Fe3+两种发光中心；②根据方钠石天然结构和形成条件，我们分别通过高温固相法和水热法合成了方钠石，并表征了其结构；③对合成的方钠石进行了各种过渡金属如Cu、Mn掺杂，并研究了其发光特性，制备出高效的蓝色、红色荧光材料；④对合成的方钠石掺杂了不同稀土离子，研究其低温、常温发光特性、热淬灭特性、衰减特性、余辉特性等等。制备出了多种蓝光、绿光、红光和白光发光材料，合成出白光LED荧光粉等。该项目的研究，为开发和研制新型光致发光材料提供了理论依据和技术指导。