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人工晶体学报 ›› 2025, Vol. 54 ›› Issue (9): 1501-1508.DOI: 10.16553/j.cnki.issn1000-985x.2025.0072

• 研究论文 • 上一篇    下一篇

提拉法生长Ca(BO22晶体的包裹体缺陷研究

黎诗锋1,2(), 杨金凤1(), 黄云棋1, 张博1, 刘子琦3, 孙军1, 潘世烈1()   

  1. 1.中国科学院新疆理化技术研究所,晶体材料研究中心,乌鲁木齐 830011
    2.中国科学院大学材料科学与光电技术学院,北京 100049
    3.南开大学物理科学学院,天津 300071
  • 收稿日期:2025-04-10 出版日期:2025-09-20 发布日期:2025-09-23
  • 通信作者: 杨金凤,潘世烈
  • 作者简介:黎诗锋(1998—),男,江西省人,硕士研究生。E-mail:lishifeng1209@163.com
  • 基金资助:
    新疆维吾尔自治区自然科学基金(2024D01A139);新疆维吾尔自治区自然科学基金(2024D01D28)

Inclusion Defects in Ca(BO22 Crystals Grown by Czochralski Method

LI Shifeng1,2(), YANG Jinfeng1(), HUANG Yunqi1, ZHANG Bo1, LIU Ziqi3, SUN Jun1, PAN Shilie1()   

  1. 1.Xinjiang Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Urumqi 830011,China
    2.College of Materials Science and Opto-Electronic Technology,University of Chinese Academy of Sciences,Beijing 100049,China
    3.School of Physics,Nankai University,Tianjin 300071,China
  • Received:2025-04-10 Online:2025-09-20 Published:2025-09-23
  • Contact: YANG Jinfeng, PAN Shilie

摘要: 偏硼酸钙(Ca(BO22)晶体的紫外透过截止边短,紫外波段透过率高,且具有较大的双折射率,是一种具有巨大发展潜力和广阔应用前景的深紫外双折射晶体,但目前生长的晶体易产生包裹体缺陷,严重影响其应用。本文采用提拉法生长Ca(BO22晶体并制备测试样品,利用偏光显微镜、扫描电子显微镜、拉曼光谱等手段对包裹体的形貌、尺寸、分布和成分进行检测,结合晶体生长的过程,分析了包裹体的形成机制,并提出了其消除策略。研究表明,Ca(BO22晶体中的包裹体为气相包裹体,来源于熔体中溶解的气体分子,在晶体中以“球形”、“线状”与“蝌蚪状”形貌出现;其形成是由晶体生长速率和气泡扩散速率共同决定,通过对熔体进行过热处理、提高生长界面的温度梯度、降低生长速率、提高晶体生长旋转速度等方式可以完全消除晶体中包裹体缺陷。

关键词: Ca(BO22晶体; 提拉法; 包裹体; 生长速率; 温度梯度; 溶质边界层

Abstract: Calcium metaborate (Ca(BO22) crystal is a kind of deep ultraviolet birefringent crystal with great development potential and broad application prospect because of its short ultraviolet transmission cutoff, high ultraviolet transmittance and large birefringence index. However, inclusion defects easily occur during the process of crystal growth, which seriously impact the application of crystals. In this study, Ca(BO22 crystals were grown using the Czochralski method, and test samples were prepared. The morphology, size, distribution, and composition of the inclusions were investigated using a polarizing microscope, scanning electron microscopy, and Raman spectroscopy. The formation mechanism of the inclusions was analyzed in conjunction with the crystal growth process, and strategies for eliminating inclusions were explored. The result of research shows that the inclusions in Ca(BO22 crystals are gaseous in nature, originating from gas molecules dissolved in the melt, and appear in the form of “spherical” “linear” and “tadpole-like” shapes. The formation of these inclusions is determined by the interplay between the crystal growth rate and the gas bubble diffusion rate. The inclusions can be completely eliminated by overheating the melt, increasing the temperature gradient at the growth interface, reducing the growth rate, and increasing the crystal growth rotation speed.

Key words: Ca(BO22 crystal; Czochralski method; inclusion; growth rate; temperature gradient; solute boundary layer

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