SPS烧结制备长余辉发光玻璃及其性能的研究

发布时间：2018-04-25 10:32

  本文选题：长余辉发光玻璃 + SBA-15粉体　； 参考：《东华大学》2015年硕士论文

【摘要】：长余辉发光材料是指在激发光停止照射后，仍能够持续发光的材料，它能把吸收的光能储存起来，在较暗的环境中发出明亮的可见光，长余辉材料被认为是一种储能、节能的发光材料，在多个领域有着广泛的应用。 商业用长余辉发光材料一般是具有不同粒度的粉体，应用时常将这些长余辉发光粉体复合到不同的基体中，制成发光制品。玻璃材料的透明性好，是一种理想的长余辉发光材料复合的基质材料。高性能长余辉发光玻璃的制备研究一直受到广大科技工作者的青睐。 目前长余辉发光玻璃的制备依然采用熔融法，要经过高温熔融才能制备出发光玻璃。由于高温熔融是个很复杂的过程，所以高性能的长余辉发光玻璃制备一直受限，需要探索新的制备方法。 固相烧结法是制备陶瓷材料和金属材料的一种常用方法，用来制备玻璃的研究并不多，因为采用这种方法制备玻璃耗时长并且难以获得高透明的玻璃。本文提出了用介孔二氧化硅做基体与放电等离子体烧结（SPS）这一新型固相烧结方法相结合制备长余辉发光玻璃，同时研究其发光性能，主要研究工作如下： （1）采用TEOS为SiO2前驱体，利用P123为模板剂，经过水热合成等一系列过程合成SBA-15粉体。通过小角XRD衍射、氮气吸附-脱附、扫描电镜和透射电镜对合成的SBA-15粉体进行了系统表征。结果表明：所合成的SBA-15呈六方孔道结构，孔径为6.608nm，比表面积达到了620m2/g； （2）将合成的SBA-15粉体利用放电等离子体烧结技术进行烧结，详细考察了SBA-15粉体的烧结特性，最终确定最佳烧结工艺为：烧结温度1020℃、烧结压力50MPa、保温时间3min。此条件下获得的纯玻璃在紫外-可见光范围内透过率达到了80%； （3）在上述工作的基础上，按照不同比例将商用长余辉发光粉体与SBA-15粉体混合均匀，然后用SPS进行烧结，在烧结压力50MPa、烧结温度980-1140℃，保温3min的条件下，，烧结制备了一系列长余辉发光玻璃。荧光光谱、紫外吸收、扫描电镜和XRD测试结果表明：经过SPS烧结后，分散在玻璃里的长余辉稀土发光粉体并没有发生分解，依然保持了原有的发光性能。 本文把商用长余辉发光粉体和介孔SBA-15粉体混合，利用SPS烧结技术，成功制备了发光性能优异的长余辉发光玻璃，这为高性能长余辉发光玻璃的制备提供了一种新方法。
[Abstract]:A long afterglow material is a material that can continue to emit light after the excitation of the light is stopped. It can store the absorbed light energy and emit bright visible light in a dark environment. The long afterglow material is considered to be a kind of energy storage. Energy-saving luminescent materials have been widely used in many fields. The long afterglow phosphors for commercial use are generally of different particle sizes. These long afterglow phosphors are often recombined into different substrates to produce luminescent products. Glass has good transparency and is an ideal matrix material for long afterglow luminescent materials. The preparation of high performance long afterglow luminescent glass has been favored by many scientists and technicians. At present, the long afterglow luminescent glass is still prepared by melting method, and the luminescent glass can only be prepared by high temperature melting. Since high temperature melting is a complex process, the preparation of high performance long afterglow glass is always limited, so it is necessary to explore new preparation methods. Solid-state sintering is a common method for preparing ceramic and metal materials. There are few studies on glass preparation because it takes a long time to prepare glass and it is difficult to obtain transparent glass. In this paper, a novel solid-state sintering method, mesoporous silica as substrate, and discharge plasma sintering (SPS) is proposed to prepare long afterglow phosphorescent glasses. The luminescence properties of the glasses are also studied. The main research work is as follows: 1) SBA-15 powders were synthesized by hydrothermal synthesis using TEOS as SiO2 precursor and P123 as template. The synthesized SBA-15 powders were characterized by small angle XRD diffraction, nitrogen adsorption-desorption, scanning electron microscopy and transmission electron microscopy. The results show that the synthesized SBA-15 has hexagonal pore structure with a pore size of 6.608 nm and a specific surface area of 620m2 / g. The SBA-15 powder was sintered by discharge plasma sintering technique. The sintering characteristics of SBA-15 powder were investigated in detail. The optimum sintering process was determined as follows: sintering temperature 1020 鈩

本文编号：1800943