MgO-Al2O3-SiO2系微晶玻璃论文：钐掺杂的MAS系微晶玻璃的制备及性能研究.doc

MgO-Al2O3-SiO2系微晶玻璃论文：钐掺杂的MAS系微晶玻璃的制备及性能研究【中文摘要】微晶玻璃作为新型结构和功能材料,以其优良的光、电、磁、化学等性能在国防尖端技术、机械制造、微电子技术等领域都得到了广泛的应用。本文阐述了MgO-Al2O3-SiO2系微晶玻璃的制备方法及性能研究。采用熔融和退火技术合成出MgO-Al2O3-SiO2系微晶玻璃,并掺杂稀土Sm3+离子。实验中以TiO2作为晶核剂,根据DSC结果制定出玻璃的晶化热处理制度。根据XRD曲线可知,随着热处理温度的升高,主晶相未发生变化,仍为Mg2Al4Si5O18。采用UV-Vis-NIR分光光度计测定钐掺杂MgO-Al2O3-SiO2系玻璃及微晶玻璃的光透过率,随着晶化热处理温度的升高,光透过率逐渐降低。在可见光区域内光波段透过率为40%-81%。在近红外区域内光波段透过率为50%-83%。采用SEM观察微晶玻璃的形貌,利用比例尺估算出晶粒尺寸为10-20nm。测量了基质玻璃和微晶玻璃的荧光光谱,稀土离子在微晶玻璃中的发光性能强于基质玻璃。【英文摘要】Glass-ceramics as a new structural and functional materials, for its excellent optical, electrical. magnetic, and chemical properties in defense advanced technology, machinery manufacturing, micro-electronics technology, and other fields have been widely used.The dissertation presented that a study on preparation and properties of the MgO-Al2O3-SiO2 system transparent glass-ceramics. MgO-Al2O3-SiO2 system transparent glass-ceramics doped with rare-earth ion Sm3+ were synthesized by the melting method and annealing technique, TiO2 as nucleation agent. The crystallization heat-treated schedules were determined by DSC results. According to XRD curve, with the crystallization heat-treatment temperature increamed, the main phase is Mg2Al4Si5O18. The lattice parameter of main crystal phase was calculated by XRD results. It was similar to the lattice parameter of the standard sample. The mean gain size was calculated by XRD results, and it was about 10nm-20nm. The optical transmittances of the glass and glass-ceramics were measured by UV-Vis-NIR spectrophotometer. With the increase of crystallization heat-treated temperature, the optical transmittances decreamed, even lost transparency. The sparency of the glass-ceramic can get 40%-81% in visible region, 50%-83% in near infrared region.The surface of glass-ceramics were observed by SEM. The grain size was estimated by SEM, and it was similar to the grain size of calculated by XRD results. The fluorescence spectra of the glass and glass-ceramics were measured. The fluorescent characteristics of rare-earth ion were stronger in the glass-ceramic than in the glass matrix.【关键词】MgO-Al2O3-SiO2系微晶玻璃 热处理 稀土离子【英文关键词】MgO-Al2O3-SiO2 system glass-ceramic Heat-treated schedules reatments Rare earth【目录】钐掺杂的MAS系微晶玻璃的制备及性能研究摘要4-5ABSTRACT5目录6-8第一章 绪论8-241.1 微晶玻璃的概念81.2 微晶玻璃的介绍81.3 微晶玻璃的发展8-101.3.1 MgO-Al_2O_3-SiO_2系微晶玻璃的发展9-101.4 微晶玻璃的性质10-121.4.1 化学性质101.4.2 热学性质10-111.4.3 电学性质111.4.4 力学性质11-121.4.5 密度121.5 微晶玻璃的特点12-131.6 微晶玻璃的种类13-161.6.1 碱及碱土金属氧化物铝硅酸盐微晶破璃14-151.6.2 碱及碱土金属氧化物硅酸盐微晶玻璃151.6.3 硼酸盐、硼硅酸盐微晶玻璃15-161.6.4 磷酸盐微晶玻璃161.7 微晶玻璃的制备方法16-191.7.1 熔融晶化法16-171.7.2 烧结法17-181.7.3 溶胶-凝胶法18-191.8 微晶玻璃的应用19-201.9 稀土发光材料20-231.9.1 稀土元素的组成201.9.2 稀土元素的性质20-211.9.3 稀土元素的发光机理21-221.9.4 稀土元素发光的优点22-231.10 本文研究的主要内容及目的23-24第二章 实验原理及实验所需仪器、试剂24-302.1 实验原理242.2 MgO-Al_2O_3-SiO_2系微晶玻璃工艺流程24-252.3 MgO-Al_2O_3-SiO_2系微晶玻璃的热处理25-262.4 实验配料分析26-272.4.1 基础玻璃配料分析26-272.4.2 稀土氧化物分析272.5 实验测试仪器27-282.6 实验设备282.7 实验试剂282.8 实验过程28-302.8.1 配置原料28-292.8.2 玻璃熔制292.8.3 玻璃成型与退火292.8.4 玻璃的加工及检测29-30第三章 热处理温度对MgO-Al_2O_3-SiO_2系微晶玻璃析晶的影响30-373.1 引言303.2 基质玻璃的组成30-313.3 差示扫描量热分析(DSC)31-323.4 X射线衍射分析(XRD)32-333.5 扫描电镜分析(SEM)33-353.6 透过率分析35-363.7 本章小结36-37第四章 热处理时间对MgO-Al_2O_3-SiO_2系微晶玻璃析晶的影响37-434.1 引言374.2 基质玻璃的组成374.3 差示扫描量热分析(DSC)37-394.4 X射线衍射分析(XRD)394.5 扫描电镜分析(SEM)39-414.6 光透过率分析41-424.7 本章小结42-43第五章 Sm_2O_3掺杂MgO-Al_2