| A:Al2O3（A=Cr,Fe,Ni）晶体生长及其缺陷研究 |
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| 引用本文： | 范修军,王越,徐宏.A:Al2O3（A=Cr,Fe,Ni）晶体生长及其缺陷研究[J].无机材料学报,2011(12):1266-1272. |
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| 作者姓名： | 范修军 王越 徐宏 |
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| 作者单位： | 北京工业大学应用数理学院;北京工业大学激光工程研究院; |
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| 基金项目： | 北京市教委基金(JC00615200901)~~ |
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| 摘 要： | 报道了A:Al2O3(A=Cr,Fe,Ni)晶体光学浮区法生长工艺,研究了旋转速率、生长速率对晶体质量的影响,制备出了φ6~8 mm、长度为60~80 mm的A:Al2O3晶体.A:Al2O3晶体的生长方向为<001>方向,X射线双晶摇摆曲线表明A:Al2O3晶体具有良好的晶体质量.通过X射线衍射、扫描电镜、偏光显微镜对晶体中的生长缺陷进行了研究,结果表明,A:Al2O3晶体的主要缺陷为小角度晶界、包裹体和溶质尾迹.研究了A:Al2O3晶体的光谱性能,并对A:Al2O3晶体的介电性能进行了测量,室温下1000 kHz时A:Al2O3晶体表现出较高的介电系数εr(12.1~15.7)和较小的介电损耗tanδ(0.0020~0.0002).
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| 关 键 词： | A:Al2O3 晶体生长 光学浮区法 晶体缺陷 |
Growth and Defects Study of A:Al_2O_3(A=Cr,Fe,Ni) Single Crystals |
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| FAN Xiu-Jun,WANG Yue,XU Hong.Growth and Defects Study of A:Al_2O_3(A=Cr,Fe,Ni) Single Crystals[J].Journal of Inorganic Materials,2011(12):1266-1272. |
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| Authors: | FAN Xiu-Jun WANG Yue XU Hong |
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| Affiliation: | FAN Xiu-Jun1,WANG Yue1,XU Hong2(1.College of Applied Sciences,Beijing University of Technology,Beijing 100124,China,2.Institute of Laser Engineering,China) |
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| Abstract: | High quality Cr-,Fe-and Ni-doped Al2O3(A:Al2O3) single crystals with a diameter of 6 8 mm and a length of 60 80 mm were successfully produced by the floating zone technique.The relationship between crystal quality and growth conditions was discussed,and the optimum preparation parameter was obtained.The crystals growth direction was determined as <001> by X-ray diffraction.The X-ray rocking curve of the crystal had a FWMH of 0.089o,proving excellent quality of the crystal.The as-grown crystals were characte... |
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| Keywords: | A:Al2O3 single crystal growth floating zone technique crystal defects |
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