Preparation and Fluorescence Properties of GdF3:Eu3+, NaGdF4:Eu3+ Materials

Abstract

The GdF3:Eu3+and NaGdF4:Eu3+powders were synthesized by hydrothermal method as raw material of Gd2O3, Eu2O3, NaF, NH4HF2, EDTA and polyethylene glycol. The powders were characterized by means of X-ray powder diffraction, SEM microscopy and Molecular fluorescence photometer. It was discussed that the pH value of aqueous solution had affection on the phase composition of synthesized powders. The complex fluorides GdF3and NaGdF4were synthesized in aqueous solution at the pH values between 3 and 6. The synthesized powders were single hexagonal phase of NaGdF4 crystal at pH=8. It was also found that different fluorescence properties were exhibited by Eu3+doping powders synthesized at different pH values of aqueous solution. The synthesized powders of GdF3and NaGdF4were excellent fluorescence materials.