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硅酸盐通报 ›› 2026, Vol. 45 ›› Issue (3): 862-870.DOI: 10.16552/j.cnki.issn1001-1625.2025.1062

• 玻璃本构与模拟计算 • 上一篇    下一篇

基于力敏光致荧光光谱的封接玻璃应力分布表征

李佳昊1(), 田英良1,2, 赵志永1,2, 张勇3, 龚柯钱3, 刘正1,2()   

  1. 1.北京工业大学材料科学与工程学院,北京 100124
    2.平板显示玻璃工艺技术国家工程研究中心,咸阳 712000
    3.清华大学核能与新能源技术研究院,北京 100084
  • 收稿日期:2025-10-31 修订日期:2025-12-01 出版日期:2026-03-20 发布日期:2026-04-10
  • 通信作者: 刘 正,博士,讲师。E-mail:liuzheng1210@bjut.edu.cn
  • 作者简介:李佳昊(2000—),男,博士研究生。主要从事电子玻璃相关研究。E-mail:ljh15233923511@163.com
  • 基金资助:
    国家自然科学基金(523B2008);北京市属高校基本科研业务费资助(312000546325001)

Characterization of Stress Distribution in Sealing Glass via Stress-Sensitive Photoluminescence Spectroscopy

LI Jiahao1(), TIAN Yingliang1,2, ZHAO Zhiyong1,2, ZHANG Yong3, GONG Keqian3, LIU Zheng1,2()   

  1. 1.College of Materials Science and Engineering,Beijing University of Technology,Beijing 100124,China
    2.National Engineering Research Center of FPD Glass Technology,Xianyang 712000,China
    3.Institute of Nuclear and New Energy Technology,Tsinghua University,Beijing 100084,China
  • Received:2025-10-31 Revised:2025-12-01 Published:2026-03-20 Online:2026-04-10

摘要:

针对不透明封接玻璃内部应力检测难及现有方法分辨率低的问题,本文提出了一种基于Cr3+掺杂Al2O3(Cr3+∶Al2O3)力敏光致荧光光谱的无损、高精度应力表征方法。通过将自制的纳米级Cr3+∶Al2O3力敏光致荧光颗粒均匀分散于铝硼硅玻璃基体,实现了同心筒状封接件玻璃径向应力的可视化定量表征,并结合微观形貌分析了裂纹形成机理。研究结果表明,Cr3+∶Al2O3颗粒在玻璃中分散均匀,具备优异的微区应力传感能力。在热膨胀系数匹配的可伐合金封接件中,玻璃全域处于压应力状态,形成了可靠的“外箍内”压缩封接结构;而在热膨胀系数失配的铜封接件中,玻璃基体主要承受拉应力,且最大拉应力区域(距界面约250 μm)与实际观测到的周向裂纹位置(距界面约300 μm)高度吻合。本工作证实了拉应力集中是导致封接失效的直接诱因,同时验证了该光谱学方法在封接玻璃微观力学行为分析与可靠性评估中的应用潜力。

关键词: 光致荧光光谱, Cr掺杂氧化铝, 玻璃-金属封接, 铝硼硅玻璃, 应力分布, 裂纹

Abstract:

To address the challenges of stress detection in opaque sealing glasses and the insufficient resolution of existing methods, this study proposed a non-destructive, high-precision stress characterization method based on stress-sensitive photoluminescence spectroscopy of Cr3+-doped Al2O3 (Cr3+∶Al2O3). By uniformly dispersing synthesized Cr3+∶Al2O3 nanoparticles into the aluminoborosilicate glass, the radial stress distribution in concentric cylindrical seals was quantitatively visualized, and the crack initiation mechanism was analyzed in conjunction with microstructure observation. The results indicate that the Cr3+∶Al2O3 nanoparticles are uniformly dispersed in the glass, demonstrating excellent micro-regional stress sensing capability. In Kovar-pin-seals with matched thermal expansion coefficients, the glass is entirely under compressive stress, forming a reliable compressive sealing structure. Conversely, in copper-pin-seals with mismatched thermal expansion coefficients, the glass matrix is predominantly subjected to tensile stress. Notably, the region of maximum tensile stress (approximately 250 μm from the interface) coincides highly with the actual location of circumferential cracks (approximately 300 μm from the interface). This work confirms that tensile stress concentration is the direct inducement of sealing failure and validates the potential of this spectroscopic method for micro-mechanical behavior analysis and reliability assessment of sealing glasses.

Key words: photoluminescence spectroscopy, Cr-doped alumina, glass-to-metal seal, aluminoborosilicate glass, stress distribution, crack

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