会议专题

Crystal Structure Stabilization of Gadolinium Aluminum Garnet (Gd3Al5O12) and Photoluminescence Properties

  To suppress the thermal decomposition and to stabilize the crystal structure of Gd3Al5O12 (GdAG) garnet,doping GdAG with smaller Ln3+ (Ln=Tb,Dy,Ho,Er,Tm,Yb,Lu,and Y,respectively) to form (Gd,Ln)AG solid solutions was proposed in work.Carbonate precursors of (Gd,Ln)AG with an approximate composition of (NH4)x(Gd,Ln)3Al5(OH)y(CO3)2·nH2O were synthesized via coprecipitation from a mixed solution of ammonium aluminum sulfate and rare earth nitrate,using ammonium hydrogen carbonate as the precipitant.The precursors and the calcination derived oxides were characterized using FT-IR spectroscopy,DTA/TG,XRD,BET and FE-SEM.The results showed that smaller Ln3+ doping can indeed stabilize GdAG against its thermal decomposition to a mixture of GdAlO3 (GdAP) and Al2O3 phases at elevated temperatures and at the same time effectively lowers the temperature for garnet crystallization.The carbonate precursors are loosely agglomerated and the resultant (Gd,Ln)AG powders show good dispersion and a fairly uniform particle morphology.The (Gd,Ln)AG solid solutions exhibit decreasing lattice parameters along with decreasing radius of the dopant ions at the same dopant content of 50 at%.Photoluminescence properties of some of the garnet solid solutions are also studied.The materials developed herein may potentially be used for photoluminescent and scintillation applications.

gadolinium aluminate garnet lattice stabilization photoluminescence

Jinkai Li Ji-Guang Li Xiaoli Wu Shaohong Liu Xiaodong Li Xudong Sun

Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education)adn School of Materials Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education)adn School of Materials

国际会议

3rd International Conference on Testing and Evalution of Inorganic Materials(第三届无机材料测试与评价学术年会(TEIM2012))

景德镇

英文

245-251

2012-10-15(万方平台首次上网日期,不代表论文的发表时间)