大尺寸优质Cr3+∶BeAl2O4晶体生长与性能研究

摘要/Abstract

摘要： 本文采用感应加热提拉法结合上称重自动控径技术,成功生长出大尺寸、高质量的翠绿宝石(Cr³⁺∶BeAl₂O₄)晶体。晶坯等径圆柱体尺寸达到 ϕ70 mm×140 mm,晶坯质量超过2 800 g。通过冷光源照射晶坯,发现晶坯中心区域 ϕ10~15 mm存在气泡。采用5 mW绿光激光照射 ϕ8 mm×130 mm的翠绿宝石晶体棒,晶体内部无散射颗粒。利用Zygo激光平面干涉仪对晶体棒进行测试,波前畸变为0.3λ@632.8 nm。用电感耦合等离子体原子发射光谱法测定了翠绿宝石晶体的铬离子掺杂浓度,并计算出轴向浓度梯度为0.5×10^-4~1.9×10^-4 cm^-1(摩尔分数)。用Perkin Elmer Lambda-950紫外可见近红外分光光度计测试了不同掺杂浓度的翠绿宝石晶体在室温下的吸收光谱,并计算了吸收系数。这些研究结果为翠绿宝石晶体的应用提供了重要的基础数据。

关键词: 翠绿宝石(Cr³⁺∶BeAl₂O₄)晶体, 提拉法, 自动控径技术, 波前畸变, 浓度梯度, 吸收系数

Abstract: In this study, large size and high quality alexandrite (Cr³⁺∶BeAl₂O₄) crystals were grown by induction heating Czochralski method combined with automatic diameter control technology. The obtained crystal diameter size reaches 70 mm, the cylinder length reaches 140 mm, and its weight exceeds 2 800 g. Irradiated with a cold light source, there are bubbles in the center area of ϕ10~15 mm. No scattered particles are found in the ϕ8 mm×130 mm crystal rod under the irradiation of a 5 mW green laser. The wavefront distortion is 0.3λ@632.8 nm measured by a Zygo laser interferometer. The Cr³⁺ doping concentrations were measured by inductively coupled plasma atomic emission spectrometry. The axial molar concentration gradients are 0.5×10^-4~1.9×10^-4 cm^-1. The absorption spectra of the alexandrine crystals with different Cr³⁺ doping concentrations at room temperature were measured by Perkin Elmer Lambda-950 UV-Vis near-infrared spectrophotometer and the absorption coefficients were calculated. These results provide important basic data for the application of alexandrite crystals.

Key words: alexandrite(Cr³⁺∶BeAl₂O₄) crystal, Czochralski method, automatic diameter control technology, wavefront distortion, concentration gradient, absorption coefficient

中图分类号:

O782

王鸿雁, 王世武, 聂奕, 张行愚, 张芳, 许辉, 李瑞茂, 匡永飞. 大尺寸优质Cr³⁺∶BeAl₂O₄晶体生长与性能研究[J]. 人工晶体学报, 2024, 53(6): 947-952.

WANG Hongyan, WANG Shiwu, NIE Yi, ZHANG Xingyu, ZHANG Fang, XU Hui, LI Ruimao, KUANG Yongfei. Growth and Properties of Large Size and High Quality Cr³⁺∶BeAl₂O₄ Crystals[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2024, 53(6): 947-952.

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大尺寸优质Cr³⁺∶BeAl₂O₄晶体生长与性能研究

Growth and Properties of Large Size and High Quality Cr³⁺∶BeAl₂O₄ Crystals

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