人工晶体学报2025，Vol.54Issue(9)：1501-1508,8.DOI:10.16553/j.cnki.issn1000-985x.2025.0072
提拉法生长Ca(BO2)2晶体的包裹体缺陷研究
Inclusion Defects in Ca(BO2)2 Crystals Grown by Czochralski Method
摘要
Abstract
Calcium metaborate(Ca(BO2)2)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(BO2)2 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(BO2)2 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.关键词
Ca(BO2)2晶体/提拉法/包裹体/生长速率/温度梯度/溶质边界层Key words
Ca(BO2)2 crystal/Czochralski method/inclusion/growth rate/temperature gradient/solute boundary layer分类
数理科学引用本文复制引用
黎诗锋,杨金凤,黄云棋,张博,刘子琦,孙军,潘世烈..提拉法生长Ca(BO2)2晶体的包裹体缺陷研究[J].人工晶体学报,2025,54(9):1501-1508,8.基金项目
新疆维吾尔自治区自然科学基金(2024D01A139,2024D01D28) （2024D01A139,2024D01D28）
