摘要
在研究LnAl3(BO3)4(Ln=稀土元素,Y)的合成及发光特性过程中,发现镧铝硼酸盐LaAl3(BO3)4具有一种新的晶体结构。本文用助熔剂法合成了LnAl3(BO3)4(Ln=Gd,La)单晶样品,LaAl3(BO3)4为薄板状,而GdAl3(BO3)4为六方的棒状。用TREOR90程序对LaAl3(BO3)4粉末样品的X射线衍射数据进行了指标化,结果为:LaAl3(BO3)4属正交晶系,晶胞参数为a=0.93586(4)nm,b=0.79904(3)nm,c=0.40626(6)nm,V=0.34595nm3。在1000℃空气环境下,用硝酸盐热分解法合成了单相LnAl3(BO3)4:Eu3+(Ln=Gd,La)荧光粉并研究了其发光特性,结果表明:LnAl3(BO3)4:Eu3+(Ln=Gd,La)是非常有前途的等离子显示器用荧光粉。
The single crystals of LnAl3(BO3)4 (Ln=Gd, La) were grown using the flux method. The LaAl3(BO3)4 crystallizes as thin platelike crystals, whereas, GdAl3(BO3)4 are hexagonal rods. The powder Xray diffraction pattern of LaAl3(BO3)4 was indexed by orthorhombic symmetry with the lattice parameters a=0.93586(4) nm, b=0.79904(3) nm, c=0.40626(6) nm, V=0.345.95 nm3 using TREOR90 program. The single phase of LnAl3(BO3)4 (Ln=Gd, La) doped with Eu3+ have been obtained by decomposition of their nitrate salts at 1000 ℃ for 24 h in air. Their photoluminescence of LnAl3(BO3)4:Eu3+ (Ln=Gd, La) powder samples were investigated. The result indicates that LaAl3(BO3)4 (Ln=Gd, La) doped with Eu3+ are promising plasma display panels materials.
出处
《中国稀土学报》
CAS
CSCD
北大核心
2002年第6期575-579,共5页
Journal of the Chinese Society of Rare Earths
基金
国家科技部资助项目
回国留学启动基金
