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人工晶体学报 ›› 2026, Vol. 55 ›› Issue (6): 843-850.DOI: 10.16553/j.cnki.issn1000-985x.2026.0044

• 研究论文 • 上一篇    下一篇

Li2O-B2O3助熔剂生长BPO4晶体

潘家越1,2(), 景芳丽1(), 刘红军1, 胡章贵1, 吴以成1   

  1. 1.天津理工大学材料科学与工程学院,功能晶体研究院,晶体材料全国重点实验室,天津市功能晶体材料重点实验室,天津 300384
    2.天津理工大学理学院,天津 300384
  • 收稿日期:2026-03-19 出版日期:2026-06-20 发布日期:2026-07-07
  • 通信作者: 景芳丽,博士,副教授。E-mail:fljing@email.tjut.edu.cn
  • 作者简介:潘家越(2000—),女,河北省人,硕士研究生。E-mail:1294379774@qq.com
  • 基金资助:
    国家自然科学基金(92163207);国家自然科学基金(92463304);天津市国家重点实验室重大专项(25ZXZSSS00470)

Growth of BPO4 Crystals from Li2O-B2O3 Flux

PAN Jiayue1,2(), JING Fangli1(), LIU Hongjun1, HU Zhanggui1, WU Yicheng1   

  1. 1.Tianjin Key Laboratory of Functional Crystal Materials,State Key Laboratory of Crystal Materials,Institute of Functional Crystals,School of Materials Science and Engineering,Tianjin University of Technology,Tianjin 300384,China
    2.College of Science,Tianjin University of Technology,Tianjin 300384,China
  • Received:2026-03-19 Online:2026-06-20 Published:2026-07-07

摘要: BPO4晶体具备极短的紫外(UV)截止边和较强的粉末倍频(SHG)效应,并且物化性质稳定,在非线性光学(NLO)材料领域具有重要的研究价值。本研究采用Li2O-B2O3助熔剂,通过顶部籽晶(TSSG)法生长了BPO4单晶,并对晶体结晶质量、光学和力学性能进行了系统研究。该助熔剂体系挥发度小,高温下溶液澄清透明,有助于实时观察晶体的生长过程。生长出的晶体的摇摆曲线半峰全宽(FWHM)为0.008°,说明在该助熔剂体系下生长出了质量良好的BPO4晶体。对BPO4晶体的拉曼及红外光谱进行了详细分析,透过光谱显示晶体的紫外及红外截止边分别为133和4 270 nm。采用纳米压痕技术研究了晶体的力学性能,测得BPO4晶体硬度约为12.75 GPa,折合模量约为153.37 GPa,表明BPO4晶体具有较好的力学稳定性。综上所述,Li2O-B2O3助熔剂挥发度小,溶液透明度高,适用于BPO4晶体生长;BPO4晶体具有极短的紫外截止边、较宽的光谱透过范围及较好的力学性能,是一种有潜力的深紫外非线性光学材料。

关键词: BPO4单晶; 非线性光学晶体; 顶部籽晶法; 助熔剂体系; 光学性能; 力学性能

Abstract: BPO4 crystal has attracted considerable interest as a nonlinear optical (NLO) material due to its extremely short ultraviolet (UV) cutoff edge,strong powder second-harmonic generation (SHG) response,and high physicochemical stability. In this work,high-quality BPO4 single crystals were successfully grown via the top-seeded solution growth (TSSG) method employing a Li2O-B2O3 flux,and their crystalline quality,optical properties,and mechanical properties were systematically investigated. The Li2O-B2O3 flux system exhibits low volatility and remains transparent at high temperatures,enabling real-time monitoring of the growth process. The as-grown crystals show a narrow rocking curve with a full width at half maximum (FWHM) of 0.008°,confirming the efficacy of this flux in producing high quality crystals. Raman and infrared spectroscopy are carefully elucidated to confirm the ion group in the BPO4 crystal. Optical transmission measurements reveal that the crystal possesses a broad transparent range,with UV and IR cutoff edges extending to 133 and 4 270 nm,respectively,underscoring its potential for deep-UV applications. Furthermore,nanoindentation tests demonstrate its robust mechanical stability,yielding a hardness of approximately 12.75 GPa and a reduced modulus of about 153.37 GPa. In summary,Li2O-B2O3 flux exhibits low volatility and high solution transparency,proving to be an excellent medium for the growth of high-quality BPO4 crystals. The combination of an extremely short UV cutoff edge,wide spectral transparency,and favorable mechanical properties positions BPO4 as a promising candidate for next-generation deep-UV NLO materials.

Key words: BPO4 single crystal; nonlinear optical crystal; top-seeded solution growth method; flux system; optical property; mechanical property

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