溶胶-凝胶法制备纳米荧光粉Y4Al2O9: Eu3+的初步研究

袁曦明; 许永胜; 于江波; 田熙科

溶胶-凝胶法制备纳米荧光粉Y₄Al₂O₉: Eu³⁺的初步研究

袁曦明^{1, 2},
许永胜³,
于江波^{1, 2},
田熙科^{1, 2}

1.
中国地质大学测试中心, 湖北武汉 430074
2.
中国地质大学纳米材料研究所, 湖北武汉 430074
3.
中国地质大学工程学院, 湖北武汉 430074

基金项目:

湖北省科技攻关重大项目 2001AA102A03

详细信息

作者简介:
袁曦明(1951-), 男, 副教授, 主要从事纳米稀土材料方向科研和教学工作

中图分类号: TQ57
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- 被引次数: 0
出版历程
- 收稿日期: 2001-11-13
- 刊出日期: 2002-07-25

Sol-Gel Synthesis Used to Prepare Nano Fluorescent Powders Y₄Al₂O₉: Eu³⁺

YUAN Xi-ming^{1, 2},
XU Yong-sheng³,
YU Jiang-bo^{1, 2},
TIAN Xi-ke^{1, 2}

1.
Testing Center, China University of Geosciences, Wuhan 430074, China
2.
Institute of Nano Materials, China University of Geosciences, Wuhan 430074, China
3.
Engineering Faculty, China University of Geosciences, Wuhan 430074, China

摘要

摘要: 用溶胶-凝胶法(sol gel) 制备了纳米荧光粉Y₄Al₂ O₉: Eu³⁺, 用X射线粉晶衍射对其进行了物相鉴定, 表明在90 0℃已经得到纯相的Y₄Al₂ O₉产物, 并用透射电镜对其进行形貌和衍射分析, 分析结果证明得到的产物为纳米粉末态晶体, 产物Y₄Al₂ O₉: Eu³⁺粒径均匀, 大致在2 0~ 5 0nm之间, 平均粒径为30nm.并用荧光光度计对其荧光光谱进行了研究, 光谱表明Eu³⁺在Y₄Al₂ O₉晶格中占据两种不同的位置.用λ =2 5 4nm的紫外光激发Y₄Al₂ O₉: Eu³⁺时, 产生两条发光谱带, 即由于⁵D₀ →⁷F₁的跃迁产生在峰值λ =5 90nm处的橙色发光带, 和⁵D₀→⁷F₂跃迁在峰值λ =6 10nm处的红色发光带.
- 稀土 /
- 溶胶-凝胶法 /
- 纳米 /
- 荧光粉 /
- 合成 /
- 发光
Abstract: Nano fluorescent powder of Y₄Al₂ O₉: Eu³⁺ is synthesized by sol gel method. The XRD shows that the production prepared at 900 ℃ is pure phase Y₄Al₂ O₉: Eu³⁺. Y₄Al₂ O₉ powder is a nano crystal testified by BF and ED analyses of TEM. The grain diameter of Y₄Al₂ O₉ ranges from 20 to 50 nm, averaged at 30 nm. The luminescent spectra show that Eu³⁺ ions occupy two kinds of sites in Y₄Al₂ O₉ crystal lattice, one in the strict inversion center, and the other in off lying inversion center. When excited with UV light (λ =254 nm), Y₄Al₂ O₉: Eu³⁺ exhibits the orange emission band at λ =590 nm due to the ⁵D₀→ ⁷F₁ transition and the red emission band at λ =610 nm due to the ⁵D₀→ ⁷F₂ transition.
- rare earth /
- sol gel method /
- nano /
- fluorescent powder /
- synthesis /
- luminescence

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图 1 Y₂O₃-Al₂O₃二元系统相图

Fig. 1. Phase diagram of system Y₂O₃-Al₂O₃

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图 2 不同条件下灼烧所得纳米荧光粉的粉晶衍射

a.不同温度下灼烧; b.不同氧化还原条件下: 1.无还原气氛灼烧; 2.还原气氛灼烧

Fig. 2. XRD curves of fluorescent materials sintered at different conditions

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图 3 纳米荧光粉YAO的透射电镜高分辨形貌相和电子衍射

Fig. 3. High resolution BF and ED through TEM of YAO fluorescent powders

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图 4 YAO: Eu³⁺的发射光谱

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