稀土长余辉发光材料SrAl2O4∶Eu2+, Dy3+的制备及性能研究

王红梅; 庞明; 张继红; 王永钱; 胡小华; 杨应国; 袁曦明

稀土长余辉发光材料SrAl₂O₄∶Eu²⁺, Dy³⁺的制备及性能研究

中国地质大学纳米科技中心, 湖北武汉 430074

基金项目:

湖北省科技攻关计划重大项目 2001AA102A03

详细信息

作者简介:
王红梅(1977-), 女, 在读硕士研究生, 研究方向为稀土发光材料

中图分类号: TQ050.4
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出版历程
- 收稿日期: 2002-06-15
- 刊出日期: 2004-01-25

Study on Preparation of Rare Earth Metal Long Phosphorescence and Its Properties

Nanotech nology Center, China University of Geosciences, Wuhan 430074, China

摘要

摘要: 采用溶胶-凝胶法在低温、还原气氛下制备了长余辉发光材料SrAl₂O₄∶Eu²⁺, Dy³⁺.用X射线粉晶衍射对其进行了物相鉴定, 表明在10 5 0℃已经得到纯相的SrAl₂O₄产物, 115 0~ 14 0 0℃物相没有改变, 仍是SrAl₂O₄相.研究了灼烧工艺、铕和锶的比值、硼酸的加入量、激活剂铕和镝的比值、基质元素铝和锶的比值等条件对SrAl₂O₄∶Eu²⁺, Dy³⁺长余辉发光材料的相对发光强度的影响.结果表明: 采用H₂作还原气氛, 灼烧温度为12 0 0℃, 恒温2h, 然后随炉自然降温的生产工艺, 可制备出发光性能优良的长余辉发光材料.
- 溶胶-凝胶法 /
- 稀土 /
- 长余辉发光 /
- 发光性能
Abstract: Sol-gel synthesis technique (SST) has been used to prepare SrAl₂O₄∶Eu²⁺, Dy³⁺. The XRD shows that the production prepared at 1 050 ℃ is pure-phase SrAl₂O₄∶Eu²⁺, Dy³⁺, and the phase will not change subjected to the temperature of 1 150 ℃-1 400 ℃. Effects of such factors as the temperature in the sintering process, different proportions of Eu/Sr, different additions of boracic acid, different proportions of Eu/Dy and different proportions of Al/Sr on the relative luminescent height have been studied. The research shows that under the condition of taking hydrogen as reductant, taking 1 200 ℃ as sintering temperature, keeping constant temperature for 2 hours and naturally lowering the temperature, high-quality phosphor products can be produced.
- sol-gel /
- rare-earth /
- long afterglow material /
- luminescent properties

HTML全文

图 1 不同温度烧结后所得发光体的粉晶衍射图

Fig. 1. XRD patterns of phosphors sintered at different temperatures

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图 2 SrAl₂O₄∶Eu²⁺, Dy³⁺的发射光谱

Fig. 2. Emission spectra of SrAl₂O₄∶Eu²⁺, Dy³⁺

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图 3 烧结温度对相对发光强度的影响

Fig. 3. Effect of temperature of sintering on relative luminescent intensity

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图 4 SrAl₂O₄∶Eu²⁺, Dy³⁺的发射光谱

Fig. 4. Emission spectra of SrAl₂O₄∶Eu²⁺, Dy³⁺

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图 5 Eu/Sr对相对荧光强度的影响

Fig. 5. Effect of proportion of Eu/Sr on relative luminescent intensity

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图 6 SrAl₂O₄∶Eu²⁺, Dy³⁺的发射光谱

Fig. 6. Emission spectra of SrAl₂O₄∶Eu²⁺, Dy³⁺

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图 7 硼酸加入量对相对发光强度的影响

Fig. 7. Effect of addition of boracic acid on relative luminescent intensity

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图 8 SrAl₂O₄∶Eu²⁺, Dy³⁺的发射光谱

Fig. 8. Emission spectra of SrAl₂O₄∶Eu²⁺, Dy³⁺

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图 9 Eu/Dy对相对发光强度的影响

Fig. 9. Effect of proportion of Eu/Dy on relative luminescent intensity

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参考文献(15)

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