摘要
用微波热效应法合成Ｙ_２Ｏ_３Ｓ∶Ｅｕ^（３＋）粉晶荧光体，经Ｘ射线粉末衍射分析确证其为六方晶系，计算得到其晶胞参数。α＝０．３７８５ｎｍ，ｃ＝０．６５９０ｎｍ．激发光谱峰呈宽带状，最大激发光谱峰λ_（ｅｘ）＝２６１ｎｍ，最大发射光谱峰λ_（ｅｘ）＝６２６ｎｍ，其次还有５９５、６１７和７０６ｎｍ，归属为Ｅｕ^（３＋）离子的~５Ｄ_０－~７Ｆ_Ｊ（Ｊ＝１、２、４）特征发射。在２５４ｎｍ光激发下，测定其发光色坐标ｘ＝０．６６５，ｙ＝０．３３０。相对发光亮度与Ｙ_２Ｏ_３：Ｅｕ^（３＋）标准荧光体比较为６２％，在３６５ｎｍ光激发下，亦可发射强的鲜艳红光。
It is the first report of using the Microwave heating method to synthesize powder cyrstal Y_2O_2S: Eu￣3+ phosphors whose structure is determined as a kind of hexagonal system by the X-rays powder diffraction. Its lattice parameters are α=0. 3785 nm , c=0. 6590 nm. The phosphors has the maxium excitation spectra peaks at λex= 261. 0 nm. The maximum emission spectra peaks atλex=626. 0 nm. Others at 595, 617 and 706 nm these belong to the characteristic emission of ￣5D0-￣7F_J(J= 1, 2,4) of Eu￣(3+). Under 254 nm excitation, the phosphors were measured by fluorophometer, its luminescent chromatic coodinate parameters are x = 0. 665, y = 0. 330. The phosphorsY_2O_2S : Eu￣3+ shows a relative luminescent brightness about 62% as compared with the Y_2O_3: Eu￣(3+)standard phosphors under 365 nm excitation the phosphors also shows a strong red luminescence.
出处
《中国稀土学报》
CAS
CSCD
北大核心
1996年第1期16-19,共4页
Journal of the Chinese Society of Rare Earths
关键词
微波热效应法
合成
稀土荧光体
荧光材料
Microwave heating method
Synthesis
Phosphors
Y_2O_2S : Eu￣(3+)
