The Research Of Synthesis And Properties Of Phosphate Luminescent Materials

Rare earth luminescent materials can be widely used in many fields and play an important role in lighting, fluorescent labeled biological, human health care,the light emitting display and agriculture, military and other fields. Therefore, the study of preparation and fluorescence properties of rare earth phosphate luminescent material has attracted more and more attention.The precursor of Ce PO4: Tb3+ luminescent material was prepared by electrospinning method, and Ce PO4: Tb3+ phosphor was obtained after further calcination. Thermogravimetric differential thermal analysis(TG-DTA) was used to analysis the formation of precursor to nano-fibers, X-ray powder diffraction was used to analysis crystal structure of the material; scanning electron microscopy was used to characterize morphology of the material, and fluorescence spectroscopy was used to analysis fluorescence properties of the material. The results show that the optimum preparation conditions are calcining for 4 h at 1150 ?. the materials have good uniformity, the diffraction peak of the crystal structure is in good agreement of standard card(JCPDS: 32-247). The luminescent materials emit green emission located at 542 nm when the luminescent materials were excited under 377 nm, and when the constant of Tb3+was 8 mol%, the luminous intensity of the material is strongest.Ba3Gd(PO4)3: Dy3+, Eu3+ phosphor was prepared by high temperature solid state, X-ray powder diffraction, scanning electron microscopy, fluorescence spectroscopy and color coordinates were used to analysis the structure,morphology, fluorescence properties of the phosphor. The results show that the optimum preparation conditions are calcining for 4 h at 1250 ?. The phosphors emit emission peaks located at 486 nm, 497 nm, 578 nm and 620 nm under349 nm excitation. When the doped content of Dy3+ and Eu3+ were 8 mol% and1 mol%, the luminous intensity of the material was strongest and the color coordinates was(0.33, 0.33).