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Eu2O3在η-Al2O3和SiO2上固体-固体表面相互作用的研究

刘荣川 夏元复 H. ENGELMANN 景剑峰 U. GONSER N. KRAMER 蒋华莉

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Eu2O3在η-Al2O3和SiO2上固体-固体表面相互作用的研究

刘荣川, 夏元复, H. ENGELMANN, 景剑峰, U. GONSER, N. KRAMER, 蒋华莉

INVESTIGATION OF SOLID-SOLID SURFACE ADSORPTION OF Eu2O3 ON η-Al2O AND SiO2 GEL

LIU RONG-CHUAN, XIA YUAN-FU, H. ENGELMANN, J. F. JING, U. GONSER, N. KRAMER, JIANG HUA-LI
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  • 用穆斯堡尔谱和X射线衍射技术研究了Eu2O3在η-Al2O3和硅胶上的固体表面吸附。
    Solid-solid surface adsorption of Eu2O3 on η-Al2O3 and SiO2 gel has been investigated using M?ssbauer spectroscopy and X-ray diffraction analysis. The results suggest that after appropriate treatment Eu2O3 disperses spontaneously onto the surface of both supporter materials. No indications of remaining crystalline Eu2O3 have been found below the limiting mono-layer concentration. In the case of η-Al2O3, it is suggested that below the limiting monolayer capacity Eu2O3 covers the surface in a disordered monolayer configuration. For higher Eu2O3 contents a second layer starts to appear with a structure similar to that of the bulk crystalline phase. In the case of SiO2 gel, it is suggested that the monolayer as well as the second layer configuration of Eu2O3 is highly disordered. It seems that the M?ssbauer parameters, isomer shift and linewidth allow additional insight into the surface layer structures formed by solid-solid adsorption.
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出版历程
  • 收稿日期:  1987-03-02
  • 刊出日期:  1988-01-05

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