文献类型：期刊文献

中文题名：花球状YBO_3∶Eu^(3+)的水热合成与表征

英文题名：Hydrothermal Synthesis and Characterization of Flowerlike YBO_3∶Eu^(3+)

作者：陈吉涛[1];顾锋[1];江浩[1];邵玮[1];李春忠[1]

机构：[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

年份：2009

卷号：24

期号：5

起止页码：1064

中文期刊名：无机材料学报

外文期刊名：Journal of Inorganic Materials

收录：CSTPCD;;EI(收录号：20094512437619);Scopus;北大核心:【北大核心2008】；CSCD:【CSCD2011_2012】；

基金：国家自然科学基金(200706015);上海市优秀学科带头人计划(08XD1401500);上海市曙光学者跟踪计划(08GG09)

语种：中文

中文关键词：水热合成;YBO3∶Eu3+;荧光;花球状

外文关键词：hydrothermal synthesis YBO3∶Eu3＋ photoluminescence flower-like structure

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.
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.