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Tb_3Al_5O_(12)∶Ce~(3+)发光粉的微波辅助合成和性能表征
Authors
曾人杰
李明利
李艳辉
陈毅彬
Publication date
15 December 2008
Publisher
Abstract
采用微波辅助合成-高温热处理制备了铈掺杂铽铝石榴石(Tb3Al5O12∶Ce3+,简称TAG∶Ce)发光粉。用XRD、SEM、激发和发射光谱等对粉末的晶型、形貌以及发光性能进行了表征。结果表明,发光粉晶粒清晰、表面光滑,粒径在2μm以下。TAG∶Ce的激发光谱主激发峰在467nm,330nm左右存在次激发峰,375nm附近存在两个强度较弱的峰;发射光谱峰值波长为550nm,与传统固相法制备的TAG∶Ce基本一致。与传统高温固相反应法相比,此方法具有高效、节能、环保等优点。通过分析反应历程,证明了Tb2O3-Al2O3系统中Al离子的分扩散系数大于Tb离子的
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Last time updated on 16/06/2016