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铕(Ⅱ)激活的焦磷酸锶镁的光致发光效率较高,在紫外光激发下的量子效率在60%以上。由于其发光光谱与多数感光纸的光敏区(350—450nm)相匹配,因此它与焦磷酸锶:铕(Ⅱ)磷光体均被制成低压汞蒸气放电灯应用放光复印领域。我们根据焦磷酸锶镁:铕(Ⅱ)的发光光谱(主峰波长393nm)恰好与制版照相的无色片感光最灵敏区(390—400nm)相吻合,将其制成低压汞蒸气激发的荧光灯,已作为黑白照相的摄影光源用于生产实践中。经过一年多的使用表明,与原用的热光源比较,不但拍摄的底片质量有了提高,而且可节电80%以上,具有显著的节能效益。本文报导了这方面的研究结果。对於焦磷酸锶镁:铕(Ⅱ)的合成及其性质的研究工作国内未见详细的报导。国外的报导也多集中于合成方法的改进,以求增大发光强度,提高复印速度。Hoffman报导了铕(Ⅱ)激活的碱土金属磷酸盐包括焦磷酸锶镁的发光,但对其合成条件及其影响因素未见论述。本文对焦磷酸锶镁:铕(Ⅱ)磷光体的合成条件:包括反应温度、还原条件、助熔剂以及激活剂浓度等进行了系统的试验,同时研究了该化合物中锶、镁克原子比变化对发光性能的影响。特别是对生成的磷光体进行物相分析表明:在不同温度下形成了不同的化合物,因而发光性能亦不同;这一结果未见文献报导。
Strontium magnesium pyrophosphate activated by europium (Ⅱ) has higher photoluminescence efficiency, and the quantum efficiency under UV excitation is over 60%. It matches strontium pyrophosphate: europium (II) phosphors with low-pressure mercury vapor discharge lamps for light beam photocopying because of its light emission spectrum matched with the photosensitive zone (350-450 nm) of most photographic papers. According to the strontium pyrophosphate magnesium: Eu (Ⅱ) luminescence spectrum (main peak wavelength of 393nm) coincides with the plate-making photographic sensitivity of the most sensitive region of the film (390-400nm), made of low-pressure mercury vapor excited fluorescent lamp, Has been used as a photographic light source for black and white photography in production practice. After more than a year of use shows that compared with the original heat source, not only the quality of the film has been improved, but also saving more than 80%, with significant energy savings. This article reports the results of this research. There is no detailed report about the synthesis and properties of strontium magnesium pyrophosphate (Europium (Ⅱ)) in China. Foreign reports are also mostly focused on the improvement of synthesis methods, in order to increase the luminous intensity, improve copy speed. Hoffman reports the luminescence of europium (II) activated alkaline earth metal phosphates including strontium magnesium pyrophosphate, but the synthesis conditions and their influencing factors are not discussed. In this paper, the synthesis conditions of strontium magnesium pyrophosphate (europium (Ⅱ)) phosphor, including reaction temperature, reduction conditions, flux and concentration of activator, were systematically investigated. At the same time, the change of the atomic ratio of strontium and magnesium The effect of luminous performance. In particular, phase analysis of the resulting phosphor showed that different compounds were formed at different temperatures and therefore the luminescent properties were also different. This result has not been reported in the literature.