物理化学学报 >> 2014, Vol. 30 >> Issue (2): 227-231.doi: 10.3866/PKU.WHXB201312161

热力学,动力学和结构化学 上一篇    下一篇

Nd3+/Yb3+离子共掺的氧化钛基上转换发光玻璃的热学和力学性能

于惠梅1,2, 潘秀红1, 张明辉1, 刘岩1, 余建定1   

  1. 1 中国科学院上海硅酸盐研究所, 上海200050;
    2 美国宾州州立大学能源研究所, 宾夕法尼亚州16802, 美国
  • 收稿日期:2013-09-13 修回日期:2013-12-13 发布日期:2014-01-23
  • 通讯作者: 潘秀红 E-mail:xhpan@mail.sic.ac.cn
  • 基金资助:

    国家自然科学基金(21005083),中国科学院公派出国留学基金(201198),中国科学院科研装备研制项目(YZ201142)及中国科学院上海硅酸盐研究所科技创新项目(Y17ZC1160G)资助

Thermal and Mechanical Properties of Nd3+/Yb3+ Co-Doped Titanate Glass with Upconversion Emissions

YU Hui-Mei1,2, PAN Xiu-Hong1, ZHANG Ming-Hui1, LIU Yan1, YU Jian-Ding1   

  1. 1 Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, P. R. China;
    2 Energy Institute, Pennsylvania State University, Pennsylvania 16802, USA
  • Received:2013-09-13 Revised:2013-12-13 Published:2014-01-23
  • Contact: PAN Xiu-Hong E-mail:xhpan@mail.sic.ac.cn
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (21005083), Visiting Scholarship Fund of Chinese Academy of Sciences (201198), Program of Scientific Equipment Development of Chinese Academy of Sciences (YZ201142), and Innovative Found of Shanghai Institute of Ceramics, Chinese Academy of Sciences (Y17ZC1160G).

摘要:

利用气悬浮无容器技术制备出了Nd3+/Yb3+稀土离子共掺杂的TiO2-La2O3-ZrO2(TLZ)发光玻璃. 利用差热分析(DTA)技术研究了该类新型稀土掺杂TiO2基上转换发光玻璃的热稳定性,主要包括玻璃化转变温度、析晶起始温度以及析晶峰值温度. 并采用两种热分析动力学计算方法得到TLZ玻璃的析晶活化能值和指前因子.本文还研究了TLZ 发光玻璃的力学性能,发现其维氏硬度大小为7.50 GPa,断裂韧性大于1.20 MPa·m1/2. 此外,还对TLZ玻璃在808 nm激光激发下的上转换发光性能进行了研究,实验结果显示光谱中有三个强发射谱峰. 优异的上转换发光性能以及良好的热稳定性和机械性能表明,这类新材料在上转换器件的实际应用中具有很大的潜力.

关键词: 热稳定性, 机械性能, 上转换发光, 氧化钛基玻璃, 气悬浮无容器技术

Abstract:

In the present work, Nd3+/Yb3+ co-doped TiO2-La2O3-ZrO2 (TLZ) glasses which were previously prepared by the aerodynamic levitation method were characterized by thermal differential analysis (DTA) and micro-hardness tests. The DTA technique was used to study the thermal stability of the characteristic temperatures, the glass transition temperature (Tg), the crystallization onset temperature (Tc), and the crystallization peak temperature (Tp), of the rare earth doped titanate glasses. The thermal kinetic DTA-analysis of the Nd3+/Yb3+ co-doped TLZ glasses was studied at heating rates of 5, 10, 15, 20 K·min-1. The activation energy (Ea) and the pre-exponential factor (A) were obtained by the Kissinger and Friedman methods. In addition, the Vickers hardness was higher than 7.50 GPa and fracture toughness was higher than 1.20 MPa· m1/2 for all the investigated TLZ glasses by the micro- hardness test. Furthermore, the upconversion luminescence property was investigated at 808 nm laser excitation, and three intense upconversion emission bands were observed. The excellent upconversion fluorescence, good thermal stability, and high mechanical strength suggested that this class of materials has potential for practical application in frequency upconversion devices.

Key words: Thermal stability, Mechanical property, Upconversion emission, Titanate glass, Levitation method

MSC2000: 

  • O642.3