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分别以尿素、甘氨酸及二者一定比例混合体作为有机燃料,采用低温燃烧法快速合成了宽频谱红外上转换发光材料CaS∶Eu,Sm,反应时间为2~3 min,产物为红色疏松多孔的超细粉末。研究了燃料种类、燃料用量对于燃烧反应现象、燃烧产生的气体量及终产物表观状态的影响;研究了辅助氧化剂用量对于燃烧反应的影响。X射线衍射(XRD)物相分析表明样品为面心立方CaS晶格结构。光谱分析表明样品在800~1600 nm之间具有宽频谱红外响应效应,上转换发光峰值波长位于655 nm,对应于Eu2+离子的4f65d→4f7(8S7/2)跃迁。
A wide range of infrared upconversion luminescence CaS:Eu, Sm was synthesized by low temperature combustion method with urea, glycine and a certain mixture of both as organic fuels. The reaction time was 2 ~ 3 min, and the product was red, loose and porous Superfine powder. The effect of fuel type, amount of fuel on combustion reaction, amount of gas produced by combustion and the apparent state of final product was studied. The effects of the amount of auxiliary oxidizer on the combustion reaction were studied. X-ray diffraction (XRD) phase analysis showed that the sample was face-centered cubic CaS lattice structure. Spectral analysis showed that the sample has a broad-spectrum infrared response at 800-1600 nm. The wavelength of the up-converted luminescence peak is at 655 nm, which corresponds to the 4f65d → 4f7 (8S7 / 2) transition of Eu2 + ions.