溶胶-凝胶法合成YAl_3(BO_3)_4:Eu^(3+)荧光粉及其发光性能  

PREPARATION OF YAl_3(BO_3)_4:Eu^(3+) BYTHE SOL–GEL METHOD AND ITS LUMINESCENCE PROPERTIES

作　　者：李桂芳[1] 曹全喜[1] 黄云霞[1] 张红国[1] 

机构地区：[1]西安电子科技大学技术物理学院,西安710071

出　　处：《硅酸盐学报》2008年第8期1114-1118,共5页Journal of The Chinese Ceramic Society

摘　　要：以硝酸盐为原料、柠檬酸为配位剂的有机-无机杂化凝胶法合成掺Eu3+的四硼酸铝钇[YAl3(BO3)4:Eu3+,YAB:Eu3+]荧光粉。通过X射线衍射、扫描电镜和Fourier变换红外光谱、发光光谱测试,分析了不同温度下焙烧3h所得粉体的物相、形貌与发光性质。结果表明:YAB:Eu3+的最低合成温度为1000℃,在反应过程中,首先形成中间相Al4B2O9,YBO3和Y3Al5O12,而最终形成单相的YAB:Eu3+。1100℃合成的晶粒尺寸比较均匀,平均粒径尺寸为108.2nm。发光光谱的测试表明:在252nm激发下,溶胶–凝胶法合成的YAB:Eu3+荧光粉最强发射峰位于612nm处,属于Eu3+的5D0→7F2跃迁。Eu3+在YAB:Eu3+基质中的最佳掺杂摩尔分数为10%。Eu^3＋-doped yttrium aluminum borate （YAl3（BO3）4：Eu^3＋, YAB：Eu^3＋） powder phosphors were prepared by the inorganic-organic hybrid sol-gel method. The phase composition and morphology of the powders calcined at different temperatures for 3 h were analyzed by X-ray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy and photoluminescence measurement. The results show that purified YAB：Eu^3＋ crystalline phase can be obtained through calcining at 1 000 ℃ for 3 h. During calcination the intermediate phase, yttrium borate （YBO3）, aluminum borate （Al4B2O9） and yttrium aluminum garnet are formed first, and finally single-phase YAB：Eu^3＋ with a trigonal structure is produced. The powder calcined at 1 100 ℃ for 3 h consists of relatively homogeneous particles with an average diameter of 108.2 rim. Under excitation with light of 252 nm, the main emission peak of the YAB ：Eu^3＋ powder is located at about 612 nm, which is due to the electric dipole transition of the ^5D0→^7F2 red emission of Eu^3＋. The optimal dophag content of Eu^3＋ ions in YAl3（BO3）4：Eu^3＋ phosphor is 10% （in mole）.

关 键 词：掺铕四硼酸铝钇 荧光粉 溶胶—凝胶法 发光光谱 

分 类 号：O614[理学—无机化学]