...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Properties, structure and crystallization study of germano-gallate glasses in the Ga2O3-GeO2-BaO-K2O system
【24h】

Properties, structure and crystallization study of germano-gallate glasses in the Ga2O3-GeO2-BaO-K2O system

机译：GA2O3-GEO2-BAO-K2O系统中德国 - 宝玻璃的性质，结构和结晶研究

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Mid-infrared transparent germano-gallate glasses (with gallium oxide as main component) have been studied following the composition law (100-x)[48.3GaO(3/2)-32.2GeO(2)-19.5BaO]-xKO(1/2) (with x = 0, 5, 10, 13, 17 mol %). All prepared glasses are transparent from approximately 280 nm up to 5.5 mu m, with a measured linear refractive index and density decreasing respectively from 1.72 to 1.67 (at 1538 nm) and 4.79 to 4.34 g/cm(3) with increasing potassium oxide content. As expected, the increase of potassium oxide content also results in a decrease of the glass transition temperature (698 to 671 degrees C) and the viscosity in the softening regime whereas the thermal expansion coefficient increases (4.8 to 10.3 x 10(-6)K(-1)). These results are related to the depolymerization of the 3D interconnected glass network which has been studied by Raman spectroscopy. Large thermal stability criteria (difference between onset of crystallization and glass transition temperatures) ranging from 182 to 199 degrees C have been measured by DSC for the compositions containing potassium oxide, suggesting strong potential for fiber drawing from glass preforms. The 40.1GaO(3/2)-26.7GeO(2)-16.2BaO-17KO(1/2) glass composition (in cation mol.%, which corresponds to 28Ga(2)O(3)-37GeO(2)-23BaO-12K(2)O in mol.%) was then selected for further investigation. Its mechanical properties (Young and shear moduli, Poisson's ratio, hardness) were measured, showing values close to those reported for well-known barium gallo-germanate (BGG) glasses. A thorough crystallization study was then carried out using DSC (Marotta's method), X-Ray diffraction and electron microscopies (TEM and SEM) to better understand the unexpected surface crystallization issues observed during the glass preform fiber drawing process. The potential of using such germano-gallate glasses to produce mid-infrared optical fiber of high mechanical strength is discussed.
机译：在组合法（100-X）之后，研究了中红外透明德国 - 亲物玻璃（用氧化镓作为主要成分）[48.3gaO（3/2）-32.2GaO（2）-19.5bao] -xO（1 / 2）（X = 0,5,10,13,17mol％）。所有制备的眼镜均为高达5.5μm的透明度，分别从1.72至1.67（1538nm）和4.79至4.34g / cm（3）中测得的线性折射率和密度减小，随着氧化钾含量的增加。如所预期的，氧化钾含量的增加也导致玻璃化转变温度（698至671摄氏度）的降低以及软化方案中的粘度，而热膨胀系数增加（4.8至10.3×10（-6）k （-1））。这些结果与已经通过拉曼光谱研究的3D互连玻璃网络的解聚有关。通过DSC针对含有氧化钾的组合物的DSC测量从182至199摄氏度的大量热稳定性标准（结晶和结晶和玻璃化转变温度之间的差异）测量，表明玻璃预制件的纤维拉伸的强潜力。 40.1gao（3/2）-26.7GeO（2）-16.2BaO-17KO（1/2）玻璃组合物（在阳离子mol.％，其对应于28ga（2）O（3）-37GeO（2） - 然后选择23baO-12k（2）O以摩尔％）进行进一步调查。测量其机械性能（幼小和剪切模量，泊松比，硬度），显示与众所周知的较令人着名的Gallo-Gerganide（BGG）眼镜报告的值。然后使用DSC（MaROTA的方法），X射线衍射和电子显微镜（TEM和SEM）进行彻底的结晶研究，以更好地了解在玻璃预制件纤维拉伸过程中观察到的意外的表面结晶问题。讨论了使用这种德国牙龈玻璃以产生高机械强度的中红外光纤的潜力。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号