稀土光学玻璃现状与发展

近年来信息产业的高速发展使光学玻璃在光传输、光转换、光储存和光电显示等领域的应用突飞猛进。为了满足各种高精密新型光电器件埘信息采集、传输、存储、转换和显示等更高性能的要求，以及对光学元件更加轻量化小型化的要求，镧系光学玻璃的技术与应用得到了十分迅猛的发展。

稀土掺杂碱锌硼硅酸盐玻璃的制备及其性能的研究

稀土玻璃由于具有高折射、低色散的特点,在红外光学玻璃以及有色光学玻璃等领域有着特殊的应用。主要研究了稀土钐掺杂碱硼硅酸盐玻璃的形成能力、玻璃的析晶产物以及稀土含量对玻璃吸收光谱的影响。实验结果表明,稀土氧化钐对碱硼硅酸盐玻璃具有较强的影响,随着稀土含量的增加玻璃的形成区域迅速缩小,玻璃的析晶能力以及对可见区和近红外区的光吸收逐渐增强。玻璃的析晶产物主要是六方(H)与三斜(T)晶型的硼酸钐晶体。

稀土玻璃废料中稀土及有价元素的回收

研究了一种从某种稀土光学玻璃中回收稀土和铌、锆的湿法工艺。此工艺首先采用盐酸酸浸出稀土,然后加入一定量的碱保持微沸30 min,过滤后得到稀土滤液和铌锆的水解固体。研究了影响稀土浸出的条件,盐酸浓度、温度、浸出时间、液固比和搅拌速率,通过酸浸正交实验得出了这些影响因素的优组合,在优组合的条件下,Y、La、Gd的浸取率分别为100.00%、99.98%、99.96%;盐酸滤液经草酸沉淀、过滤、洗涤、灼烧获得稀土混合氧化物纯度为99.80%,总回收率高达99.6%。水解获得的铌、锆混合物经过草酸溶解、加Na_2CO_3沉淀铌,使铌、锆得到了分离;铌、锆的回收率分别到达91.68%、99.47%。

王大珩院士在英国的创新成果

著名光学家、两院院士王大珩1938年赴英留学。他一走进英国伦敦大学帝国学院应用光学系，就进入一种进取向上的学习状态。不久，便发表了《在有球差存在下的最佳焦点》的学术论文，向异国的高等学府亮出了中国学子的不凡才华。

INFORMATION

Current situation and oeve＇opment of RE optical glass By LI Weimin As the high speed development of information industry, application of optical glass in optical transmission, optical conversion, optical storage and optoelectronics display increase rapidly in recent years. To satisfy high-performance requirements of information collection, transmission, storage, conversion and display by manifold new high-precision photoelectric devices and to meet the tendency of weight-lighted and smaller size optical components, technology and application of lanthanum series optical glass have got rapid development in recent years.

Current situation and development of RE optical glass(continued)

IV Market analysis of RE-based La series optical glass1. RE production and market status Huge RE reserve has always been regarded as one of the advantages for China＇s rare earths application in high tech fields.

Optical Properties of WO3-PbO Tellurite Glasses Doped with Rare Earths

The tellurium-based glasses TeO2, 85TeOz-15WO3, 85TeO2-10WO3-5Sm203, 77TeO2-20WO3-3Y203, 77TeO2-20WO3-3La203, 65TeO2-33WO3-2Er203 and 49TeO2-29.4WO3-19.6PbO-2Er203 have been prepared by melt quenching technique. Density and molar volume have been measured for the present glasses. Optical absorption studies are carried out on the glass system in the wavelength range of 200-900 nm. The compositions depend on different physical parameters such as density, molar volume and oxygen packing density will be discussed. Also, molar refraction （RM）, calculated refractive index （n）, metallization criterion （M）, electronic polarizability of the oxide ion （to2＂（Eopt） and optical basicity A^opt have been determined.