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Direct Determination of Rare Earth Impurities in High Purity europium oxide by ICP-MS

Journal of Rare Earths 2003年第S1期21卷 225-229页

作者：曾艳胡斌何蔓江祖成 Department of Chemistry Wuhan University

A novel inductively coupled plasma mass spectrometry method for direct determination of trace rare earth impurities in high purity europium oxide (Eu_2O_3) was developed. The spectral interference,matrix effect,instrument parameters fluctuation were investigated and the optimized experimental conditions were established. Under the selected conditions,the detection limits of the method are 3～7 ng·L (-1),the RSD is varied between 2.1%～8.4%,and the percentage recovery is ranged from 90% to 113% for the analytes. The solid detection limit for gross amount of 13 rare earth impurities is 0.19 μg·g (-1) when the matrix (Eu) concentration of 0.1 mg·ml (-1) was chosen. Compared with the reported methods in the literature,this method has several attractive features: simple,small sample amount required,no internal standard and matrix matching requirements.

关键词： inductively coupled plasma mass spectrometry europium oxide rare earth impurities matrix effect spectral interference rare earths

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Synthesis of nanosize europium oxide particles by using W/O microemulsion

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Chinese Journal of Chemistry 1999年第6期17卷 691-693,560页

作者：侯文华马军陈静颜其洁 School of Chemistry and Chemical Engineering Nanjing University Nanjing Jiangsu 210093 China Department of Applied Chemistry Nanjing University of Chemical Technology Nanjing Jiangsu 210009 China

europium hydroxide particles with an average diameter of 10 run and a BET surface area of 127 m2 /g have been prepared by controlled precipitation in the polyoxyethylene octylphenol (Triton X-100) (hex-anol)/cyclohexane/water microemulsion system. After calcination in air at 750℃, the obtained europium hydroxide particles were readily converted to the nanosize Eu2O3 particles with an average size of 30 nm and a high BET surface area of 36.5 m2/g.

关键词： Nanosize particles europium oxide microemulsion

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Luminescent Properties and Energy Transfer Mechanism of Gd^(3+) and Eu^(2+) Co-doped Phosphate Glasses

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Acta Metallurgica Sinica(English Letters) 2015年第4期28卷 487-491页

作者： Qian Wang Shao-Ye Ouyang Wei-Huan Zhang Bin Yang Yue-Pin Zhang Hai-Ping Xia Key Laboratory of Photo-Electronic Material Ningbo University

The phosphate glasses doped with Eu2＋, Gd3＋, respectively, and co-doped with Gd3＋ and Eu2＋ were prepared by high-temperature melting method. The transmission spectra, the excitation spectra, the emission spectra and the fluorescent decay time were investigated. The energy transfer process between Gd3＋ and Eu2＋ was studied. From the excitation spectra and the emission spectra of the phosphate glasses doped with Eu2＋, we observed that the emission intensity of Eu2＋ shows higher for 0.02 mol% Eu2＋-doped phosphate glass. According to the excitation spectra and the emission spectra and the fluorescence decay curves, when the concentration of Eu2＋ was 0.02 mol%, the optimal con- centration of Gd3＋ was 0.3 tool%. Based on Dexter theory, it is shown that the energy transfer between Gd3＋ and Eu2＋ was nonradiation energy transfer by analyzing the energy-level diagram. The fluorescence decay curves of Gd3＋ were expressed by the Inokuti-Hirayama＇s model and were used to analyze energy transfer mechanism between Gd3＋ and Eu2＋. And the energy transfer efficiency was also calculated.

关键词： europium oxide Phosphate glass Luminescent properties Energy transfer Inokuti-Hirayama's model

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Impact of Eu3＋ Ions on Physical and Optical Properties of Li2O-Na2O-B2O3 Glass

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Chinese Journal of Chemical Physics 2016年第3期29卷 395-400,I0002页

作者： N. A. Razak S. Hashim M. H. A. Mhareb Y. S. M. Alajerami S. A. Azizan N. Tamchek 马来西亚工程大学物理系 Skudai Johor 81310 约旦能源矿产管理委员会辐射防护总局安曼11183 巴勒斯坦爱资哈尔大学医疗放射医学系加沙地带马来西亚博特拉大学物理系 Serdang 43400

The lithium sodium borate glasses doped with Eu3＋ ion are prepared using melt quenching technique, their structural and optical properties have been evaluated. The density of pre- pared glasses exhibits an inverse behavior to the molar volume ranging from 2.26 g/cm3 to 2.43 g/cm3 and 26.95 cm3/mol to 26.20 cm3/mol, respectively. The absence of sharp peaks in XRD patterns confirms the amorphous nature of the prepared glasses. The absorption spectra yield four transitions centered at 391 nm （7F0→5L6）, 463 nm （7F0→5D2）, 531 nm （7F0→5D1）, and 582 nm （7F0→5D0）. The most intense red luminescence is observed at 612 nm corresponding to 5D0→7F2 transition under 390 nm laser excitations.

关键词： Absorption Photoluminescence Borate glass europium oxide

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