Open AccessA MOSSBAUER STUDY FOR THE Eu2O3 DISPERSITY ON THE SUPPORT SURFACE
Author(s) -
Rongchuan Liu,
Xia Yuanfu,
Shuxin Wang,
Yukui Li,
Yan QiJie,
Yi Chen,
Haiyang Liu
Publication year - 1986
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.35.243
Subject(s) - dispersity , mössbauer spectroscopy , materials science , surface (topology) , crystallography , chemistry , mathematics , polymer chemistry , geometry
M?ssbauer spectroseopy has been used to study the dispersity of Eu2O3 on the surface of different supports. Changes in M?ssbauer parameters as a function of the europium content reveal the difference of the interaction between Bu2O3 and the support. On the surface of γ-Al2O3, the M?ssbauer isome shift progressively increases toward to that of bulk Eu2O3 with increasing metal loading, suggesting that the crystal phase of Eu2O3 forms gradually. In contrast, on the surfaces of two types of SiO2 the isomer shifts do not change with changing the metal loading in the range of our study. This suggests that Eus03 tends to spread out on the surface as a second layer over monola-yer dispersion. The conclusion obtained by M?ssbauer spectroseopy is in agreement with that obtained by X-ray diffraction