Composition-dependent properties of Ca-α-SiAlON:Eu2+ phosphors prepared by combustion synthesis
Composition-dependent properties of Ca-α-SiAlON:Eu2+ phosphors prepared by combustion synthesis
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燃烧合成制备的 Ca-α-SiAlON:Eu2 荧光粉的成分依赖性特性
DOI：
10.1016/j.ceramint.2016.09.204
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发表时间：
2017-02
影响因子：
5.2
通讯作者：
Qi Wang
中科院分区：
文献类型：
--
作者：
Yiyao Ge;Jie Zhang;Ying Chen;Siyuan Sun;Zhaobo Tian;Zhipeng Xie;Qi Wang
在此，我们提出了一种简单的燃烧合成策略，高效制备了不同组成的Ca（m/2−x）EuxSi 12 −m-nAlm+ nOnN 16 −n掺Eu的Ca-α-SiAlON黄色荧光粉。合成的荧光粉在近紫外光或蓝光的激发下具有显著的黄光发光特性，峰值在~580 nm。在设计的实验中，通过调节起始反应物的比例，得到了由不同的mandn值决定的不同组成的产物。此外，组成对产品的整体性能的依赖性进行了系统的研究。结果表明，Mn值对合成的荧光粉的相组成、微观结构和发光性能有明显的影响。在本研究体系中，m =1.5，n =0.8的样品光谱强度增强最显著。结果表明，Ca-α-SiAlON：Eu 2+荧光粉具有纯度高、均匀性好、等轴形貌等特点。观察到发射波长随m值增加而连续红移，随n值增加而反向蓝移的现象，并合理地揭示了这一现象。
Herein, we put forward a simple combustion synthesis strategy for the highly efficient preparation of Eu-doped Ca-α-SiAlON yellow phosphors with different composition of Ca(m/2−x)EuxSi12−m-nAlm+nOnN16−n. The as-synthesized phosphors were endowed with outstanding photoluminescence behavior of yellow emission peaking at ~580 nm under excitation of near-ultraviolet (UV) or blue light. In the designed experiments, products with different compositions, which were determined by the varyingmandnvalues, were obtained by adjusting the proportion of starting reactants. Further, the dependence of composition on the overall properties of products was systematically studied. It was found that themandnvalues could have distinct impact on the phase composition, microstructure and photoluminescence properties of as-synthesized phosphors. The most prominent enhancement of spectral intensity was achieved in the sample with composition ofm=1.5 andn=0.8 in this research system. The resultant Ca-α-SiAlON:Eu2+phosphors were simultaneously featured with high purity, favorable uniformity and equiaxial morphology. A continuous red shift phenomenon in emission wavelength with the increase ofmvalue and an inverse blue shift with the increase ofnvalue were both observed and rationally uncovered.
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影响因子：
1.7
作者：
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通讯作者：
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作者：
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通讯作者：
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影响因子：
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作者：
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通讯作者：
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