Effect of starting composition and post-anneal on the structure and luminescence properties of Eu-doped Ca-α-SiAlON phosphors prepared by combustion synthesis

Eu-doped Ca-α-SiAlON yellow phosphors, with the compositions Ca0.72Eu0.08Si9.56Al2.44O0.84N15.16, were prepared by a highly efficient combustion synthesis method. By optimizing the starting compositions of reactants and choosing appropriate post-annealing conditions, phase-pure, uniform and fine Ca-...

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Bibliographic Details
Published inJournal of rare earths Vol. 32; no. 6; pp. 501 - 507
Main Author 陈莹 袁轩一 陈克新 崔巍 葛一瑶
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.06.2014
Subjects
Ca-α-SiAlON:Eu2
Combustion synthesis
Composition effects
Emission
Luminescence
Optimization
Particle size
Phosphors
photoluminescence
post-anneal
Rare earth metals
rare earths
SiAlON
发光特性
成分
燃烧合成法
荧光体
退火条件
钙
铕掺杂
post-anneal
Ca-α-SiAlON:Eu2
photoluminescence
combustion synthesis
rare earths
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ISSN1002-0721
2509-4963
DOI10.1016/S1002-0721(14)60099-5

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Summary:Eu-doped Ca-α-SiAlON yellow phosphors, with the compositions Ca0.72Eu0.08Si9.56Al2.44O0.84N15.16, were prepared by a highly efficient combustion synthesis method. By optimizing the starting compositions of reactants and choosing appropriate post-annealing conditions, phase-pure, uniform and fine Ca-α-sialon：Eu2＋ phosphors possessing the particle size ranging -3-5μm, and good luminescence properties with an intense emission band that peaks at 592 nm under n-UV or blue light excitation were ob-tained. The results indicated that combustion synthesis method was an energy efficient, time saving and low cost way to prepare Ca-α-SiAlON phosphors by controlling the mass ratio of comburents. A combination with post-annealing treatment was desired for further increase of the properties of Ca-α-SiAlON phosphors.
Bibliography:11-2788/TF
CHEN Ying , YUAN Xuanyi , CHEN Kexin , CUI Wei , GE Yiyao （1. State Key Laboratory New Ceramics and Fine Processing, School of Materials, Tsinghua University, Beijing 100084, China,＂ 2. Beijing Key Laboratory Opto-electronic Functional Materials ＆ Micro-nano Devices, Department of Physics, Renmin University of＇China, Beijing 100872, China）
Eu-doped Ca-α-SiAlON yellow phosphors, with the compositions Ca0.72Eu0.08Si9.56Al2.44O0.84N15.16, were prepared by a highly efficient combustion synthesis method. By optimizing the starting compositions of reactants and choosing appropriate post-annealing conditions, phase-pure, uniform and fine Ca-α-sialon：Eu2＋ phosphors possessing the particle size ranging -3-5μm, and good luminescence properties with an intense emission band that peaks at 592 nm under n-UV or blue light excitation were ob-tained. The results indicated that combustion synthesis method was an energy efficient, time saving and low cost way to prepare Ca-α-SiAlON phosphors by controlling the mass ratio of comburents. A combination with post-annealing treatment was desired for further increase of the properties of Ca-α-SiAlON phosphors.
combustion synthesis; Ca-α-SiAlON：Eu2＋; photolummescence; post-anneal; rare earths
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ISSN:1002-0721
2509-4963
DOI:10.1016/S1002-0721(14)60099-5