کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1818720 1026034 2010 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Novel seed for batch cold seeding production of GdBaCuO bulks
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Novel seed for batch cold seeding production of GdBaCuO bulks
چکیده انگلیسی
A batch process for fabrication of GdBa2Cu3Oy pellets in air was developed. The samples were melt-processed using the cold-seeding method and as seeds Nd-123 thin films grown on MgO crystals. We used a self-made Gd-123 and Gd-211 powders mixed with 0.1 wt.% of Pt. Up to 1-1.5 kg of melt-grown Gd-123 bulks can be prepared in one process. XRD results confirmed that all the bulks are c-axis oriented. The superconducting and magnetic performance of the pellets is checked on several small test samples cut out at various standard positions within the bulk. The values are quite uniform and performance is similar to the oxygen-controlled melt-grown Gd-123 samples. The average trapped field at 77 K in the 24 mm diameter samples batch lies between 0.8 and 0.9 T. The maximum trapped field of 1 T at the sample surface was the highest value reported so far for Gd-123 single grains processed in air. The present results prove that a high-performance good-quality LREBa2Cu3Oy material can scale up from laboratory conditions to industrial production.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica C: Superconductivity and its Applications - Volume 470, Issue 20, 1 November 2010, Pages 1158-1163
نویسندگان
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