水热法与固相法制备Ca_2B_5O_9Cl∶Eu光谱特性的研究  

Study on Spectral Properties of Ca_2B_5O_9Cl∶Eu Prepared with Hydrothermal Method and Solid Method

作　　者：董红军[1] 常树岚[1] 

机构地区：[1]延边大学理学院化学系,吉林延吉133002

出　　处：《光谱学与光谱分析》2007年第11期2167-2170,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(20261006);吉林省科技发展计划项目(20040506-2)资助

摘　　要：对比研究了制备方法(水热法与高温固相法)、激发条件、Eu离子浓度对Ca2B5O9Cl∶Eu发光体光谱特性及制备条件对晶体形貌的影响。结果表明,水热法制备的Ca2B5O9Cl∶Eu发光体在254nm激发下主要以Eu3+的5D0→7FJ(J=1,2,3,4)跃迁发射为主,365nm激发下则以Eu2+的4f65d1→8S7/2跃迁发射为主。高温固相法制备的发光体在365nm激发下主要是Eu2+的4f65d1→8S7/2跃迁发射,而254nm激发下Eu2+和Eu3+的发射均较弱。Eu浓度对Ca2B5O9Cl∶Eu的光谱特性影响较小,而制备方法和激发条件却对其影响较大。SEM揭示了空气条件与还原气氛制备的产品结晶完美、表面光滑、颗粒度在0.82～1.06μm之间。Effects of preparation methods （hydrothermal method and high temperature solid method）, excitation condition, and Eu ions concentration on spectral properties of Ca2B5O9Cl： Eu phosphor were studied. The effects of preparation condition on crystal photographs were also discussed. The result showed that the Ca2B5O9Cl： Eu phosphors prepared with hydrothermal method had mainly ^5D0→7FJ （J=1,2,3,4） emission of Eu^3＋ with 254 nm excitation and 4f^6 5d→^8S1/2 emission of Eu^2＋ with 365 nm excitation, the one prepared with high temperature solid method had mainly 4f^6 5d→^8S1/2 emission of Eu^2＋ with 365 nm excitation and very weak emissions of Eu^2＋ and Eu^3＋ with 254 nm excitation. Eu ions concentration hardly affected spectral properties, but the preparation method and excitation conditions had remarkable influence on the properties. SEM revealed that the products prepared both in the air and reductive atmosphere had consummate crystal, slippery surface and appropriate size （0.82-1.06 μm）.

关 键 词：水热法 高温固相法 Ca2B5O9Cl:Eu 光谱特性 

分 类 号：O433.1[机械工程—光学工程]