OALib Journal期刊
M1.95P2O7:0.05Eu3+ (M = Ba, Sr, Ca)红色荧光粉的制备及其发光性能
Abstract:
以尿素为燃料，采用溶液燃烧法合成出M2P2O7Eu3+(M=Ba,Sr,Ca)红色荧光粉。利用X射线衍射和荧光光谱研究了激活剂Eu3+对3种荧光粉晶体结构和发光性能的影响。结果表明，制得样品分别为纯相的六方晶系Ba2P2O7、正交晶系Sr2P2O7和四方晶系Ca2P2O7。光谱分析表明，M2P2O7Eu3+(M=Ba,Sr,Ca)的激发峰位置和发射峰位置均基本相同。M1.95P2O70.05Eu3+(M=Ba,Ca)发射红光，其对应于5D0→7F2电偶极跃迁的612nm发射峰强度高于对应于5D0→7F1磁偶极跃迁的588nm和593nm发射峰，说明Eu3+在M2P2O7(M=Ba,Ca)基质中处于非对称格位；而Sr1.95P2O70.05Eu3+发射橙红光，Eu3+在Sr2P2O7基质中处于对称格位。在394nm激发下，M1.95P2O70.05Eu3+(M=Ba,Sr,Ca)的色度坐标分别为(0.35，0.21)、(0.24，0.15)、(0.35，0.21)。这3种荧光粉均能被394nm紫外光和464nm蓝光有效激发，发射红光或橙红光。
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