无机材料学报 ›› 2023, Vol. 38 ›› Issue (10): 1230-1236.DOI: 10.15541/jim20230068

• 研究快报 • 上一篇    下一篇

GeO2-La2O3-TiO2玻璃的结构、热学和光学性质

万家宝1(), 张明辉2(), 苏怀宇2, 曹枝军2, 刘学超2, 谢坚生2, 王祥远2, 时英辉2, 王亮2, 雷水金1()   

  1. 1.南昌大学 物理与材料学院, 南昌 330031
    2.中国科学院 上海硅酸盐研究所, 上海 200050

Structural, Thermal, and Optical Properties of GeO2-La2O3-TiO2 Glasses

WAN Jiabao1(), ZHANG Minghui2(), SU Huaiyu2, CAO Zhijun2, LIU Xuechao2, XIE Jiansheng2, WANG Xiangyuan2, SHI Yinghui2, WANG Liang2, LEI Shuijin1()   

  1. 1. School of Physics and Materials Science, Nanchang University, Nanchang 330031, China
    2. Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
  • Received:2023-02-10 Revised:2023-02-24 Published:2023-10-20 Online:2023-03-23
  • Contact: LEI Shuijin, professor. E-mail: shjlei@ncu.edu.cn;
    ZHANG Minghui, associate professor. E-mail: zhangminghui@mail.sic.ac.cn
  • About author:WAN Jiabao (1998-), male, Master candidate. E-mail: jbwan_siccas@126.com
  • Supported by:
    National Natural Science Foundation of China(21961019);National Natural Science Foundation of China(22265018);Chinese Academy of Sciences(2020256);Science and Technology Committee of Shanghai(20QA1410300);Science and Technology Committee of Shanghai(22511100300);Science and Technology Committee of Shanghai(20511107400);Space Utilization System of China Manned Space Engineering(KJZ-YY-NCL07);National Key Research and Development Program of China(2021YFA0716304)

摘要:

La2O3-TiO2玻璃以其折射率高、光学性能优异,在透镜、光学窗口、光通信等领域具有广阔的应用前景。受限于玻璃形成能力, 人们难以制备出大尺寸La2O3-TiO2玻璃, 这严重限制其应用。本研究通过引入网络形成体GeO2, 有效提高了玻璃形成能力, 从而可用常规方法制备大尺寸的GeO2-La2O3-TiO2(GLT)玻璃。差热分析表明, GLT玻璃具有较高的玻璃转变温度和抗析晶性能, 玻璃转变温度Tg和ΔT T=Tc-onset-Tg)分别大于833和209 ℃。最大折射率为2.06, 在可见光和近红外波段的透过率可达78%。实验还研究了Ti含量对GLT玻璃结构、热学和光学性能的影响。结果表明, 随着钛含量增加, 玻璃的形成能力和热稳定性均减弱。摩尔体积Vm和氧离子极化率αi的变化趋势与折射率一致。GLT玻璃对开发高性能、轻量化、小尺寸的新型器件具有重要意义。

关键词: 高折射率, 热稳定性, 大尺寸玻璃, 高透过率

Abstract:

La2O3-TiO2 glasses show promising application prospect in fields of lenses, optical windows, and optical communication, owing to their high refractive index and excellent performance. However, this glass cannot be prepared into large size because of its weak glass forming ability, which seriously limits its application. In this study, introducing the network former GeO2 can effectively improve the glass forming ability, so that large-sized GeO2-La2O3-TiO2 (GLT) glass can be prepared using conventional methods. Differential thermal analysis shows that GLT glasses have high glass transition temperature (Tg) and strong resistance to precipitation, with Tg and ΔT (Tc-onset-Tg) greater than 833 and 209 ℃, respectively. The refractive index is up to 2.06. The transmittance can reach 78% in the visible and near-infrared wavelength bands. The glass forming ability and thermal stability can be weakened by increasing the content of TiO2. The molar volume and oxygen electron polarizability exhibit the same variation trends as the refractive index of the samples. This result is important for developing new devices with high performance, light weight, and small size.

Key words: high refractive index, thermal stability, large size glass, high transmittance

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