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- W2100079872 abstract "The effects of 10 keV Ar+ ion irradiation on the electrical characteristics of BaCe0.9Y0.1O2.95 subject to fluences of 0, 1.0 × 1017, 5.0 × 1017 and 1.0 × 1018 ions/cm2 at room temperature, has been investigated using elastic recoil detection analysis (ERDA), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), X-ray photoelectron spectroscopy (XPS) and alternating current (AC) impedance measurements. It was confirmed from the ERDA results that the hydrogen concentration near the surface increased with increase of Ar+ ion fluence. This increase may be associated with the increasing quantities of hydrogen generated by interaction between oxygen vacancies, formed by irradiation, and H2O from exposure to air. SEM images showed clearly that the number of surface defects due to modification increased with increasing fluence. In addition, the size of the defects showed a tendency to increase with increasing fluence. From the results of XPS analyses, providing information on the electronic states on the surface, it was evident that with increase in the Ar+ ion fluence, the quantity of excess oxygen, such as hydroxide, increased in the oxygen 1s XPS spectrum. In addition, it was indirectly found, from decomposition of the Ce 3d, spectrum that the concentration of oxygen vacancies increased with fluence, since the percentage of Ce3+ also increased. Accordingly, the surface modification led to the formation of more oxygen vacancies and a greater hydrogen concentration on the surface, since the H2O interacted with some of them. From the results of the DC conductivity and AC impedance measurements, the proton conductivity was shown to predominate over the temperature range from 473 K to 823 K. It was concluded that the increase in these protons and vacancies generated from surface modification contributed to the increase of proton conductivity." @default.
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- W2100079872 date "2011-08-01" @default.
- W2100079872 modified "2023-09-24" @default.
- W2100079872 title "Effect of Ar+ irradiation on the electrical conductivity of BaCe0.9Y0.1O3−δ" @default.
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- W2100079872 doi "https://doi.org/10.1016/j.apsusc.2011.04.136" @default.
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