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采用高温固相法制备了Sr3-xSiO5∶xEu荧光粉,研究了不同还原气氛对该荧光粉的物相结构、发光性能和颗粒形貌的影响。结果表明,不同还原气氛下制得的荧光粉样品的物相结构与Sr3SiO5基本一致,但都含有Sr2SiO4中间相;还原气氛中氢气比例越高,样品发光强度越高,而且样品颗粒越大。此外,Eu2+离子浓度在1%~9%(摩尔百分数,下同)之间变化,发射光谱峰值从575nm红移到588nm。Eu2+离子浓度为5%时,发光强度最大,达到123.5(Eu2+离子浓度为1%时发光强度为100)。
The Sr3-xSiO5: xEu phosphor was prepared by solid-state reaction at high temperature. The effects of different reducing atmosphere on the phase structure, luminescent properties and particle morphology of the phosphor were investigated. The results show that the phase structure of the samples obtained under different reduction atmosphere is basically the same as that of Sr3SiO5, but both of them contain Sr2SiO4 mesophase. The higher the proportion of hydrogen in reducing atmosphere, the higher the luminescence intensity and the larger the sample particle size. In addition, the Eu2 + ion concentration varied between 1% and 9% (molar percentage, the same below), and the peak of the emission spectrum red-shifted from 575 nm to 588 nm. Eu2 ion concentration of 5%, the maximum luminous intensity, reaching 123.5 (Eu2 ion concentration of 1% luminous intensity of 100).