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人工晶体学报 ›› 2026, Vol. 55 ›› Issue (2): 281-290.DOI: 10.16553/j.cnki.issn1000-985x.2025.0202

• 研究论文 • 上一篇    下一篇

导模法蓝宝石不同表面形貌处的晶体质量研究

舒骏1(), 聂玲达1, 赵鹏2(), 薛龙飞1   

  1. 1.中国地质大学(武汉)珠宝学院,武汉 430074
    2.北京中材人工晶体研究院有限公司,北京 100018
  • 收稿日期:2025-09-17 出版日期:2026-02-20 发布日期:2026-03-06
  • 通信作者: 赵鹏,博士,高级工程师。E-mail:zhaopeng8903@163.com
  • 作者简介:舒骏(1990—),女,湖北省人,副教授。E-mail:shujun@cug.edu.cn
  • 基金资助:
    国家重点研发计划(2022YFB3705900)

Crystal Quality of Different Surface Morphologies in Sapphire by EFG Method

SHU Jun1(), NIE Lingda1, ZHAO Peng2(), XUE Longfei1   

  1. 1.Gemmological Institute,China University of Geosciences (Wuhan),Wuhan 430074,China
    2.Beijing Sinoma Synthetic Crystals Co. ,Ltd. ,Beijing 100018,China
  • Received:2025-09-17 Online:2026-02-20 Published:2026-03-06

摘要: 本研究通过优化导模(EFG)法蓝宝石生长初期的工艺参数,成功在晶体表面诱导形成具有台阶状形貌的特殊表面结构,并采用多种表征手段系统对比台阶状表面与平坦表面的晶体质量。结果表明,台阶状表面样品的拉曼光谱半峰全宽、X射线衍射(XRD)单晶摇摆曲线半峰全宽及光谱透过率均优于平坦表面样品。此外,台阶状表面的平均气泡尺寸分别为42.98 μm×37.27 μm和37.90 μm×35.23 μm,均显著小于平坦表面的68.04 μm×55.70 μm和52.03 μm×36.89 μm,且台阶状表面的气泡分布密度、氧空位浓度及内部应力均较低。扫描电子显微镜观察发现,台阶状表面的生长阶梯呈平直紧密状排列,而平坦表面的生长阶梯为不规则弯曲和松散状,且平坦表面的生长阶梯间距大于台阶状表面。综上所述,台阶状表面在晶体结构完整性和光学性能方面均表现更优。本研究为高质量导模法蓝宝石晶体的可控生长提供了新的工艺思路。

关键词: 蓝宝石晶体; 导模法; 晶体质量; 气泡; 生长台阶

Abstract: In this study,by optimizing the process parameters in the early stage of sapphire growth by the edge-defined film-fed growth (EFG) method,a special interface structure with stepped morphology was successfully induced on the crystal surface. Multiple characterization techniques were employed to systematically compare the crystal quality between the stepped interface and the flat interface. The results show that the full width at half maximum of Raman spectrum,the full width at half maximum of X-ray diffraction(XRD) single crystal rocking curve and the spectral transmittance of the stepped interface samples are better than those of the flat interface samples. In addition,the average bubble sizes of the stepped interface regions are 42.98 μm×37.27 μm and 37.90 μm×35.23 μm,respectively,which are significantly smaller than those in the flat interface (68.04 μm×55.70 μm and 52.03 μm×36.89 μm). The stepped interface also demonstrates lower bubble distribution density,oxygen vacancy concentration and internal stress. Scanning electron microscope observation reveales that the growth steps on the stepped interface are parallel,straight and closely spaced,whereas the growth steps on the flat interface are irregular and loose,with distance of the growth steps on the flat interface is larger than that on the stepped interface. In summary,the stepped interface performs better in crystal structure integrity and optical properties. This study provides a novel process strategy for the controlled growth of high-quality sapphire crystals using the EFG method.

Key words: sapphire crystal; EFG method; crystal quality; bubble; growth step

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