Solid State Combustion Synthesis And Luminescent Properties Of Rare Earth Doped Molybdate Luminescent Materials

Owing to the good stability in light, heat and chemical characteristics, the rare earth-doped molybdate is a good kind of luminescent material, but there are few reports on it. Solid state method is a traditional method to synthesize the rare earth-doped molybdate, by which the obtained particle size is very large, moreover, grinding will bring impurity and destroy crystal leading to decreased luminescent intensity. Therefore, this paper explores a new synthesis method, namely, the solid state combustion method, to synthesize the rare earth-doped molybdate successfully. The main contents and results are as following:The rare earth doped molybdate up-conversion phosphor is synthesized by the solid state combustion method. The phase, micro-structure and luminescent properties of samples are characterized by X-ray diffraction (XRD) analysis, scanning electron microscopy (SEM) and spectroscopic analysis. The results show that the average size of the rare earth-doped molybdate particle is about 1μm. The particles, which have narrow particle size distribution, are quasi-spherical without ball-milling. At the same time, solid state combustion method overcomes the disadvantages of the traditional solid method such as the high temperature, long reaction-time and high energy-cost. It is a simplification, speediness, economy, high efficiency and high quality method to synthesize luminescent materials.As to the luminescent powders of molybdate doped with Yb³⁺ and Er³⁺ ions, the luminescence properties of Er³⁺ in yttrium molybdenum oxide, gadolinium molybdenum oxide and lanthanum molybdenum oxide and the effect of different host materials on the up-conversion luminescence are studied. In addition, the influence of doping concentration of Er³⁺ ions on the luminescent properties is studied detailedly. The...