کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1528281 1511863 2006 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of γ-irradiation on oxygen content and kinetic parameters of high Tc Y1Ba2Cu3O7 − δ superconductors
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Effect of γ-irradiation on oxygen content and kinetic parameters of high Tc Y1Ba2Cu3O7 − δ superconductors
چکیده انگلیسی

The effect of γ-irradiation on oxygen content and kinetic parameters of high temperature ceramic Y1Ba2Cu3O7 − δ (YBCO) superconductor have been investigated. The bulk samples prepared by the standard solid-state method were irradiated by γ-rays of different dose in the range of 5.04 × 103 to 4.23 × 107 (R) at room temperature. The effects of irradiation on surface morphology viz. grain size, porosity and the presence of some impurity phases have been studied by scanning electron microscopy (SEM). The changes in transition temperature (Tc) and the drop in Tc (ΔT) have been discussed in terms of change in oxygen value (O-value) in unirradiated and irradiated samples due to out-diffusion of oxygen. The oxygen contents δ for both the unirradiated and irradiated samples have been precisely determined by standard iodometric titration technique. The kinetic parameters viz. order of reaction (n) and activation energy (|ΔE|) for both the samples have been precisely estimated by thermo gravimetric analysis (TGA). The effect of γ-irradiation on irradiated samples has been studied by Infrared (IR)-spectroscopy.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Chemistry and Physics - Volume 97, Issues 2–3, 10 June 2006, Pages 230–235
نویسندگان
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