The Synthesis of YAG : Ce 3 + Phosphor by Mechanical Method

Ce3+-doped Y3Al5O12 (Y2.97Al5O12:Ce0.03, YAG:Ce3+) phosphors have been widely used for white light emitting diodes (LEDs). Here, we report on the effect of Al(OH)3 powder addition on the mechanical synthesis of YAG:Ce3+ phosphor. The YAG:Ce3+ phosphors were synthesized by the mechanical method using an attrition-type mill. When Al(OH)3 was added at 12.5 mass% to the raw powder materials and milled, the synthesis of YAG:Ce3+ phosphor was achieved at the vessel temperature of 438°C. The crystalline, structure, luminescence spectra and internal quantum yield of YAG phosphor were evaluated by X-ray diffraction, scanning electron microscopy, photoluminescence spectroscopy and a quantum yield measurement device, respectively. The synthesized YAG:Ce3+ phosphor revealed the maximum internal quantum yield of 27%.

[1]  T. Kozawa,et al.  Effect of BaF2 powder addition on the synthesis of YAG phosphor by mechanical method , 2017 .

[2]  T. Kozawa,et al.  One-step mechanical synthesis of LiFePO4/C composite granule under ambient atmosphere , 2014 .

[3]  T. Kozawa,et al.  Rapid synthesis of LiNi0.5Mn1.5O4 by mechanical process and post-annealing , 2014 .

[4]  T. Kozawa,et al.  One-pot Mechanical Synthesis of LiCoO2 from Li2O Powder , 2014 .

[5]  H. Abe,et al.  One-step mechanical synthesis of the nanocomposite granule of LiMnPO4 nanoparticles and carbon , 2013 .

[6]  P. Bodrogi,et al.  White LED Light Characteristics as a Function of Phosphor Particle Size , 2012 .

[7]  Kikuo Okuyama,et al.  Formation and Luminescence Enhancement of Agglomerate-Free YAG : Ce3 + Submicrometer Particles by Flame-Assisted Spray Pyrolysis , 2007 .

[8]  M. Senna,et al.  Effects of reduced coordination number for Ca on the electron redistribution during Ca-O-Si bridge bonding from CaO or Ca(OH)2 and SiO2 , 1999 .

[9]  A. Nakahira,et al.  New Method for Elucidation of Temperature at the Interface Between Particles under Mechanical Stirring , 1996 .

[10]  M. Senna,et al.  Mechanisms of incipient chemical reaction between Ca(OH)2 and SiO2 under moderate mechanical stressing II: Examination of a radical mechanism by an EPR study , 1996 .

[11]  M. Senna,et al.  Mechanisms of Incipient Chemical Reaction between Ca(OH)2and SiO2under Moderate Mechanical Stressing , 1996 .

[12]  Akio Ikesue,et al.  Fabrication and Optical Properties of High‐Performance Polycrystalline Nd:YAG Ceramics for Solid‐State Lasers. , 1995 .

[13]  K. Ohno,et al.  The Synthesis and Particle Growth Mechanism of Bright Green Phosphor YAG : Tb , 1994 .

[14]  M. Kestigian,et al.  Optical Properties of Cerium-Activated Garnet Crystals* , 1969 .

[15]  G. Blasse,et al.  Investigation of Some Ce3+‐Activated Phosphors , 1967 .