无机材料学报

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花球状YBO3∶Eu3+的水热合成与表征

陈吉涛, 顾 锋, 江 浩, 邵 玮, 李春忠   

  1. (华东理工大学 材料科学与工程学院 超细材料制备与应用教育部重点实验室, 上海200237)
  • 收稿日期:2009-02-10 修回日期:2009-05-07 出版日期:2009-09-20 网络出版日期:2009-09-20

Hydrothermal Synthesis and Characterization of Flowerlike YBO3∶Eu3+

CHEN Ji-Tao, GU Feng, JIANG Hao, SHAO Wei, LI Chun-Zhong   

  1. (Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science & Technology, Shanghai 200237, China)
  • Received:2009-02-10 Revised:2009-05-07 Published:2009-09-20 Online:2009-09-20

摘要: 采用水热法制备了均匀分散、具有花球形貌的YBO3∶Eu3+. 利用X射线衍射仪、X射线能量仪、高分辨透射电镜、扫描电镜等手段对其结构、形貌进行了研究, 发现其为六方球霰石晶相, 仅含有Y、O、B、Eu元素, 微球直径约1~2μm, 组装成花球的薄片厚度约100nm. 提出了其形成机理:在水热过程中生成的YBO3晶核在六亚甲基四胺(HMT)的调节下各向异性生长为二维薄片, 并最终组装成为花球状结构. 研究发现得到的YBO3∶Eu3+在612nm表现出显著的红光发射, 并且由于Eu3+附近晶体场对称性降低, 样品表现出较高的红光/橙光(R/O)比率.

关键词: 水热合成, YBO3∶Eu3+, 荧光, 花球状

Abstract: YBO3∶Eu3+ microspheres with flower-like structures were fabricated by a facile hydrothermal method. The composition, structure and morphology of obtained YBO3∶Eu3+ were studied by means of XRD、EDX, HRTEM and SEM. The as-prepared YBO3∶Eu3+ microspheres show hexagonal vaterite phase with the elements of Y, O, B, Eu to be found. The YBO3 microspheres, with an average diameter of 1-2μm, are composed of nanosheets with thickness of 100nm. The formation mechanism of the flower-like structures is also proposed. The YBO3∶Eu3+ samples have a strong red emission at 612nm and a high R/O ratio under ultraviolet excitation, which indicate lower symmetry of crystal field around Eu3+ in such flower-like structures.

Key words: hydrothermal synthesis, YBO3∶Eu3+, photoluminescence, flower-like structure

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