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化学学报
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化学学报 ›› 1997, Vol. 55 ›› Issue (2): 178-183. 上一篇    下一篇

研究论文

Eu^2^+激活的LiAl5O8和Al2O3的荧光性质

刘应亮;李沅英;杨燕生;石春山   

  1. 暨南大学化学系;中山大学化学系;中国科学院长春应用化学研究所;中国科学院稀土化学与物理开放实验室
  • 发布日期:1997-02-15

Luminescence of Eu^2^+ in LiAl5O8 and Al2O3

LIU YINGLIANG;LI YUANYING;YANG YANSHENG;SHI CHUNSHAN   

  • Published:1997-02-15

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通过研究Eu^2^+在LiAl5O8和Al2O3基质中的荧光性质, 发现Eu^2^+在LiAl5O8和α-Al2O3基质中产生f→f跃迁发射, 在α-Al2O3和γ-Al2O3的混合相中Eu^2^+的f→f跃迁发射消失, 产生一新的带状发射。运用晶场和共价理论及晶体结构数据对实验结果进行详细讨论, 采用电负性平均化原理和Sanderson电负性标度计算基质中Eu^2^+所带分电荷及Eu-O键的离子性百分数, 合理地解释了实验结果。

关键词: 氧化铝, 铕, 晶场理论, 荧光特性, 共价晶体, 氧化铝锂

The f→f transition emission of Eu^2^+ in LiAl5O3 and α-Al2O3 is found for the first time, disappearing of the f→f transition emission of Eu^2^+ and there existing a new band emission in mixture phases of α-Al2O3 and γ-Al2O3. The experimental results are discussed in detail by crystal structure data of hosts and theory of crystal field and covalence. Partial charge of Eu^2^+ and ionic percentage of Eu-O(F) and M-O(F) in hosts are calculated by Sanderson's theory, a content explanation of the experimental phenomena being obtained.

Key words: ALUMINIUM OXIDE, EUROPIUM, CRYSTAL FIELD THEORY, FLUORESCENCE CHARACTERISTIC, COVALENT CRYSTALS

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