Preparation And Characterization Of Luminescent Lanthanide Materials BaMoO₄:Eu³⁺

A red luminescent material which has high luminosity and is stable have been put emphasis on by researchers in material field. In this paper, chemical precipitation method and high-temperature energy ball milling method were adopted to synthesize red luminescent materials powder (BaMoO4:Eu3+), and some research and discussion have been done in its best preparation techniques.The precursors were synthesized by using chemical precipitation method and choosing ammonium molybdate, barium nitrate and europium oxide as raw materials. According to the DSC-TGA curves, the hot decomposition of precursor was determined, and the reasonable calcinations temperature of powder was made. Different BaMoO4:Eu3+powders were prepared by controlling the pH value of solution and changing the method of Eu3+doped, the precipitation temperature, the calcinations temperature and the concentration of Eu3+doped. The BaMoO4:Eu3+ powder was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and emission spectra. Experimental results show that the best preparation techniques of BaMoO4:Eu3+powder were pH≈7, precipitation temperature for 80℃, calcinations temperature for 1000℃and concentration of Eu3+doped for 8% mol. The relative luminescent intensity of BaMoO4:Eu3+powder prepared under the best techniques is 1200.The BaMoO4:Eu3+powder was prepared by using high-temperature energy ball milling method and choosing ammonium molybdate, barium carbonate and europium oxide as raw materials. Different BaMoO4:Eu3+powders were synthesized by changing the ball milling temperature, the ball milling time and the concentration of Eu3+doped. The BaMoO4:Eu3+powder was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and emission spectra. Experimental results show that the best preparation techniques of BaMoO4:Eu3+ powder were ball milling temperature for 600℃, ball milling time for 4h and concentration of Eu3+doped for 15% mol. The relative luminescent intensity of BaMoO4:Eu3+powder prepared under the best techniques is 1350.A conclusion can be obtained from the above two experiments, compared with the traditional chemical precipitation method, adopting high-temperature energy ball milling method can not only synthesize BaMoO4:Eu3+ powder with simple preparation techniques and in a lower temperature which has been cut down 400℃, but also can get a better luminescent performance.