PREPARATION OF LUMINESCENT MATERIALS BaMoO_4:Eu~(3+) BY HIGH TEMPERATURE BALL MILLING

Abstract

BaMoO_4:Eu~(3+)phosphors were synthesized by high temperature ball milling method and using(NH_4)_6Mo_7O_(24)·4H_2O,BaCO_3 and Eu_2O_3 as raw materials.Crystalline phases,morphology and luminescent properties of sample were characterized by XRD,SEM and emission spectra. XRD patterns indicated that a single phase of BaMoO_4:Eu~(3+)can be obtained by 4 h ball milling at 600℃,with 15%Eu~(3+)(mole fraction)dopped concentration.Photolumincence experiment results showed that the emission is a line spectrum and the main peak is located at visible red light (616 nm).The synthesized temperature was decreased about 400℃while the dopped Eu~(3+)concentration was increased about 7%than those of chemical deposited method.The BaMoO_4:Eu~(3+)powders has considerable luminescent intensity prepared under the optimum technological conditions.In the high temperature ball milling process,the cooperation action of milling and temperature,significantly increased the activation energy of the reaction system.