化工新型材料

化工新型材料 ›› 2019, Vol. 47 ›› Issue (11) : 87-93.

新材料与新技术

Mg²⁺或Zn²⁺掺杂的Ca(WO₄)_1-x(MoO₄)_x∶Eu³⁺荧光粉的制备及发光性能研究

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Preparation and luminescent properties of Mg²⁺/Zn²⁺ doped Ca(WO₄)_1-x(MoO₄)_x∶Eu³⁺

Wu Chao, Li Feng, Fan Wei, Zhang Jing, Sun Jie

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Received		Published
2018-05-31		2019-11-20
Issue Date	Revised Date
2019-12-04	2018-05-31

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摘要

以三氧化钨(WO₃)、三氧化钼(MoO₃)、碳酸钙(CaCO₃)和三氧化二铕(Eu₂O₃)为原料,通过高温固相法制备了Eu³⁺激活的钨钼酸钙Ca(WO₄)_1-x(MoO₄)_x∶Eu³⁺红色荧光粉,探究固溶成分变化对材料发光特性的影响。在Eu³⁺和Li⁺摩尔分数均为10%条件下,钨酸根离子(WO^2-₄)被不同摩尔分数的钼酸根离子(MoO^2-₄)替换,Ca²⁺被不同摩尔分数的Mg²⁺和Zn²⁺替换。通过X射线衍射仪对样品进行结构分析,通过激发光谱和发射光谱对所制样品的发光性能进行研究。结果表明:当焙烧温度为800℃,(MoO₄)^2-摩尔分数为25%,Li⁺和Eu³⁺摩尔分数均为10%,Mg²⁺摩尔分数为1%时,荧光粉的发光强度最好,其激发峰位于～352nm处,发射峰在～612nm处;Zn²⁺摩尔分数为3%时,荧光粉发光强度最好,其激发峰位于～294nm处,发射峰在～612nm处。

Abstract

White light-emitting diodes (WLEDs) has been widely research owing to their vast merits of high luminescence efficiency,energy saving,long lifetime and environmentally friendly.In order to obtain high efficiency red phosphor,a Ca(WO₄)_1-x(MoO₄)_x∶Eu³⁺ solution was made,which was activated by Eu³⁺cation and to explore how the component changed in solid solution influenced the illuminant properties of the material.The single-phase red phosphor was synthesized via a conventional high-temperature solid-state reaction route using WO₃,MoO₃,CaCO₃ and Eu₂O₃.Based on the precursor,Eu³⁺ and Li⁺ were kept constant as 10% while (WO^2-₄) were replaced by (MoO₄)^2- with different molar percentages.Meanwhile,Ca²⁺ was replaced by different concentrations of Mg²⁺ and Zn²⁺^.The structure of the samples was analyzed by XRD,while the luminescent properties of the samples were studied by excitation spectrum and emission spectrum.The result indicated that when the calcination temperature was 800℃,(WO^2-₄) substitute for (MoO₄)^2- molar percentage of 25%,Li⁺ and Eu³⁺ doping concentration of 10%,Mg²⁺ doping concentration of 1%,the luminescence properties of the phosphor was the strongest.Its excitation peak was located at about 352nm,the emission peak was emitted at about 612nm.When doping Zn²⁺with a concentration of 3% had the strongest luminescence properties,the excitation peak is located at about 294nm,and the emission peak located at about 612nm.

关键词

高温固相法 / 钨钼酸盐 / 红色荧光粉

Key words

high temperature solid state method / tungsten molybdate / red phosphor

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Mg²⁺或Zn²⁺掺杂的Ca(WO₄)_1-x(MoO₄)_x∶Eu³⁺荧光粉的制备及发光性能研究[J]. 化工新型材料, 2019, 47(11): 87-93 DOI:

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