量子电子学报 ›› 2021, Vol. 38 ›› Issue (2): 172-179.

• “先进光学晶体”专辑 • 上一篇    下一篇

新型长波红外材料PbGa6Te10 的生长


韩卫民1;2, 倪友保1∗, 吴海信1;2, 王振友1, 黄昌保1   


  1. 1 中国科学院合肥物质科学研究院安徽光学精密机械研究所, 安徽省光子器件与材料重点实验室, 安徽合肥230031; 2 中国科学技术大学, 安徽合肥230026
  • 收稿日期:2020-10-26 修回日期:2020-11-19 出版日期:2021-03-28 发布日期:2021-03-29
  • 通讯作者: E-mail: ybni@aiofm.ac.cn E-mail:465602251@qq.com
  • 作者简介:韩卫民( 1994 - ), 安徽人, 研究生, 主要从事中远红外晶体材料方面的研究。E-mail: 1678001061@qq.com
  • 基金资助:
    Supported by National Natural Science Foundation of China (国家自然科学基金, 51702323)

Growth of a new long-wave infrared material PbGa6Te10

HAN Weimin1;2, NI Youbao1∗, WU Haixin1;2, WANG Zhenyou1, HUANG Changbao1   

  1. 1 Anhui Provincial Key Laboratory of Photonic Devices and Material, Anhui Institute of Optics and Fine Mechanics, Hefei Institute of Physical Science, Chinese Academy of Sciences, Hefei 230031, China; 2 University of Science and Technology of China, Hefei 230026, China
  • Received:2020-10-26 Revised:2020-11-19 Published:2021-03-28 Online:2021-03-29
  • Contact: You baoNi E-mail:465602251@qq.com

摘要: 新型长波红外材料PbGa6Te10 具有折射率高( > 3)、红外透光范围广(1:4 ∼ 22:3 m)、稳定性和机械 性能较好等优点, 具有较大的应用潜力。但PbGa6Te10 为非同成分共熔体, 极易导致成分偏析, 形成杂相等。 采用振荡辅助单温区法合成了优质多晶, 由垂直布里奇曼法生长出了长度达100 mm、最大直径为26 mm 的 PbGa6Te10 单晶棒。对生长出的晶体进行了X 射线粉末衍射、摇摆曲线、热重差热分析和透过率等测试。结果 表明所生长出的晶体为PbGa6Te10 单晶; 结晶性较好, 半峰宽(FWHM) 为0.214◦; 晶体具有良好的热稳定性; 根 据漫反射吸收曲线计算得到PbGa6Te10 的带隙值为1.01 eV; 透过率曲线表明在2:5 ∼ 22:3 m 波段平均透过率约 28%。

关键词: 晶体生长, 长波红外材料, PbGa6Te10, 布里奇曼法, 振荡辅助

Abstract: The new long-wave infrared material PbGa6Te10 has great application potential due to its high refractive index ( > 3), wide infrared transmittance range (1:4 ∼ 22:3 m), good stability and mechanical properties. However, PbGa6Te10 is a non-identical eutectic compound, which can easily lead to segregation of components and the formation of heterogeneous phases. For this reason, high quality PbGa6Te10 polycrystal is synthesized by the oscillation-assisted single-temperature zone method, and the single crystal with a length of 100 mm and a maximum diameter of 26 mm is grown by the vertical Bridgman method. The as-grown crystals are characterized by X-ray powder diffraction, rocking curve, thermogravimetric differential thermal analysis, infrared transmittance, et al. Results show that the grown crystal is PbGa6Te10 single crystal. It is crystallized well, and the full width at half maximum (FHWM) is 0.214◦. The crystal has good thermal stability. The band gap value of PbGa6Te10 calculated from the diffuse reflection absorption curve is 1.01 eV, and the transmittance curve shows that the average transmittance from 2.5 m to 22.3 m is about 28%.

Key words: crystal growth, long-wave infrared materials, PbGa6Te10, Bridgman method, oscillation-assistance

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