Eu^3＋在（GdO）3BO3中的发光特性

研究了紫外光（ＵＶ）和阴极射线（ＣＲ）激发下（ＧｄＯ）＿３ＢＯ＿３：Ｅｕ的发光特性及其光谱随组成和结构变化的规律。在这两种激发条件下，（ＧｄＯ）＿３ＰＯ＿３中的Ｅｕ￣（３＋）均能发出明亮的红色荧光。ＣＲ激发下，在加速电压１０～２０ｋＶ、电流密度１～５μＡ／ｃｍ￣２内，Ｅｕ￣（３＋）的发光亮度与电压或电流密度之间均呈良好的线性关系，并具有耐电子束轰击的能力。根据３９５ｎｍＵＶ激发下（Ｇｄ＿（１－ｘ）ＥｕｘＯ）＿３ＢＯ＿３体系中Ｅｕ￣（３＋）的５Ｄ＿１→￣７Ｆ＿１跃迁（５３５ｎｍ）及￣５Ｄ＿ｏ→￣７Ｆ＿２跃迁（６１１ｎｍ）发射强度与Ｅｕ￣（３＋）浓度的关系，证明其浓度猝灭机理分别为电偶极－电偶极相互作用和交换作用。     

Luminescent Properties of Eu~(3+) and Bi~(3+) and Their Interaction in LaBO_3 and GdBO_3

Under the excitation of UV light and cathode ray,the dependence of the excitation and emission spectraand luminescent lifetime of Eu~(3+)and Bi~(3+)on composition and structure in LABO_3 and GdBO_3 has been stu-died.The results indicate that the emission spectra of Eu~(3+)in LaBO_3 with aragonite structure and in GdBO_3with YBO_3 structure are quite different.Under 254 nm excitation,Eu~(3+)emission is sensitized by Bi~(3+)inGdBO_3 matrix.In other case Eu~(3+)emission is quenched by Bi(3+).     

LUMINESCENCE AND ENERGY TRANSFER OF Ce~(3 ) AND Dy~(3 ) IN LaBO_3

This paper studies photo-,cathodo-and X-ray luminescence of Ce~(3 ) and Dy~(3 )mono-doped LABO_3samples or Ce~(3 ),Dy~(3 ) codoped LaBO_3 samples and the dependence of Ce~(3 ) and Dy~(3 ) luminescent intensi-ties on compositions.The results obtained indicate that Ce~(3 ) can sensitize well the luminescence of Dy~(3 ) un-der UV excitation and quench markedly it under CR and XR excitation.This paper also studies the concen-tration dependence of emission intensity of Dy~(3 ) under the excitation of peak wavelength of 352 nm,con-firming that the mechanism of concentration self-quenching of Dy~(3 ) is a dipole-dipole interaction and themechanism of the energy transfer from Ce~(3 ) to Dy~(3 ) is a resonant transfer in which electric multipoleinteraction plays a leading role.     

络合吸附色层法纯制碱金属化合物的研究

制备高质量的荧光粉,首先要制得高纯度的原材料。制备高纯原材料,不仅要提纯基质材料,也要纯制助熔剂。碱金属化合物可用作发光材料的基质,也可用作助熔剂。因此有必要研究碱金属化合物的提纯,以除去其中对发光有害的杂质。使用络合吸附色层法来提纯发光材料是一种简单易行、生产效率较高的方法。     

BaYB_9O_（16）中Ce_（3＋）→Dy_（3＋）的能量传递机理

本文研究了在紫外光激发下，Ｃｅ３＋、Ｄｙ３＋共掺杂的ＢａＹＢ９Ｏ１６发射光谱，激发光谱以及发光强度随组成而变化的规律。结果表明，Ｃｅ３＋对Ｄｙ３＋发光有较强的敏化作用，Ｃｅ３＋→Ｄｙ３＋的能量传递效率达９０％以上，能量传递机理为电偶极—电偶极相互作用的共振传递。     

Ca3La3（BO3）5基质中Tb^3＋的光致发光

在２５４ｎｍ紫外光激发下，研究了Ｃａ３Ｌａ３（ＢＯ３）５基质中Ｔｂ＾３＋的激发光谱，发光光谱、发光寿命与Ｔｂ＾３＋的４ｆ＾８→４ｆ＾７５ｄ＾１允许迁的激发带位于２３０～２６０ｎｍ光谱区，故Ｔｂ＾３＋能很好地吸收激活能而发光，成为一种有发展前途的绿粉。Ｃｅ＾３＋可能与Ｔｂ＾３＋争夺激活能而猝灭Ｔｂ＾３＋的发光，一定量的Ｄｙ＾３＋能敏化Ｔｂ＾３＋的发光。     

REBO3基质中Sm^3＋的阴极射线发光特性

ＲＥＢＯ＿３基质中Ｓｍ￣（３＋）的阴极射线发光特性郭凤瑜彭夷安（北京大学１００８７１）（湖南医学专科学校）ＲＥＢＯ＿３（ＲＢ＝Ｌａ、Ｇｄ、Ｙ）是一类优良的发光材料的基质。对于ＲＥＢＯ＿３中稀土离子（如Ｃｅ￣（３＋）、Ｐｒ￣（３＋）、Ｓｍ￣（３＋）、Ｅ...     

Synthesis and Structural Investigation of （LaO）_3BO_3 with Eu~（3＋） as Luminescent Probe

ＳｙｎｔｈｅｓｉｓａｎｄＳｔｒｕｃｔｕｒａｌＩｎｖｅｓｔｉｇａｔｉｏｎｏｆ（ＬａＯ）_３ＢＯ_３ｗｉｔｈＥｕ~（３＋）ａｓＬｕｍｉｎｅｓｃｅｎｔＰｒｏｂｅＰｅｎｇＹｉ＇ａｎ（彭夷安）；ＬｉＱｉｈｕａ（李其华）（ＨｕｎａｎＭｅｄｉｃａｌＣｏｌｌｅｇｅ，Ｃ?..