【作者】 代雪晶； 汤澄清；

【Author】 DAI Xue-jing TANG Cheng-qing (Criminal Science and Technology,China Criminal Police University,Shenyang 110035)

【机构】 中国刑事警察学院刑事技术系；

【摘要】 采用草酸盐共沉淀法制备纳米发光材料LaPO₄:Eu³⁺,并采用XRD、SEM、红外光谱分析、荧光光谱分析等对其进行了表征。研究了不同的煅烧温度和不同铕含量对发光性能的影响,研究结果表明,样品的煅烧温度越高,颗粒大小越细,发光强度越大。随着铕含量的增加,发光强度先增强后减弱,Eu³⁺的掺杂量在1%（摩尔分数）时,纳米粒子的荧光强度最强,更高的掺杂浓度将导致荧光猝灭。从发射光谱可以看出,在短波紫外线激发照射下,纳米发光材料在584nm和594nm处发射出较强的荧光。更多还原

【Abstract】 This paper discussed that the nanoscale rare earth luminescent materials of LaPO₄:Eu³⁺ which was prepared in oxalate precipitation method using oxalic acid as the coordination reagent.Characterization with XRD,SEM,infrared spectroscopy and fluorescence spectroscopy were carried out.The experimental results showed that the luminescent properties of the samples closely related to their sintering temperature and particle size.The higher the sintering temperature and the better the samples crystallized,the higher luminescent intensity of the samples.The Eu³⁺ content had effect on luminescent properties and the optimized Eu³⁺ content was 1%.The emission spectrum showed that this nano-luminescent material could more effectively emit the strong luminescence at 580 and 594nm excited by short ultraviolet light.更多还原