Study On Preparation And Properties Of Re³⁺（Re=Yb,Nd,Er）,Eu³⁺:YGG Polycrystalline Luminous Powder

RE3+(RE=Yb,Nd,Er),Eu3+:YGG polycrystalline luminous powder were prepared by Citrate-gel low temperature combustion method and Ammonia co-precipitation method,the influencing factors of the two kinds of preparation methods were discussed and the best preparation plan was summarized.The samples were characterized via XRD, IR, SEM and fluorescence spectra.The analysis results show that the outstanding precursor was prepared by Citrate-gel low temperature combustion method when pH value was3,amd temperature was100-110℃and the outstanding precursor was prepared by Ammonia co-precipitation method when the solution’s pH value was8-9.The analysis results show that the samples which prepared by Citrate-gel low temperature combustion method YGG phase showed when it were calcined at700℃,and the best calcining temperature was900℃;the average powder particle size is about60nm,uniform particles and no addlomeration. The samples which prepared by Ammonia co-precipitation method YGG phase showed when it were calcined at800℃,and the best calcining temperature was900℃; the average powder particle size is about80nm with good dispersion.The fluorescence spectra test shows that RE3+(RE=Yb,Nd,Er),Eu3+:YGG polycrystalline luminous powder had two main emission peaks,592nm and611nm, the592nm was5D0â†'7F1magnetic dipole transition of Eu3+,the611nm was5D0â†'7F2forced electric dipole transition of Eu3+. The Yb3+which doped in the sample got sensitization to the luminous of Eu3+,it can strengthen the luminous intensity of the sample’s two main emission peaks;but the luminous intensity of the sample’s two main emission peaks were quenched by the Nd3+and Er3+...