宽频谱红外上转换材料CaS∶Eu,Sm的快速合成及表征

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。

Rapid Synthesis and Characterization of Extended Range Infrared Up-Conversion Material CaS∶Eu,Sm

The extended range infrared up-conversion material CaS∶Eu,Sm was synthesized by the low-temperature combustion synthesis (LCS) method with urea, glycine and urea-glycine as the organic fuel respectively, which brought about a new approach to the synthesis of other system materials through LCS method except for oxides and compound oxides. The whole reaction duration is 2～3 minutes and the product is red loose ultrafine powders. The effect of the category and content of fuels on combustion reaction, gas amount and the condition of samples was discussed. The effect of the amount of auxiliary oxidant on combustion reaction was studied. X-ray diffraction (XRD) patterns show that the products are with face-centre CaS crystal structure. Spectral analysis indicates that the sample is sensitive to 800～1600 nm infrared light and the peak up-conversion wavelength is 655 nm which corresponding the transition 4f65d→4f7(8S7/2) of Eu2+ ion.