کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1818439 1525741 2011 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
High performance batch production of LREBa2Cu3Oy using novel thin film Nd-123 seed
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
High performance batch production of LREBa2Cu3Oy using novel thin film Nd-123 seed
چکیده انگلیسی
A batch production for fabrication of LREBa2Cu3Oy (LRE: Sm, Gd, NEG) “LRE-123” pellets are developed in air and Ar-1% O2 using a novel thin film Nd-123 seeds grown on MgO crystals. The SEM and XRD results conformed that the quality and orientation of the seed crystals are excellent. On the other hand, new seeds can withstand temperatures >1100 °C, as a result, the cold seeding process was applied even to grow Sm-123 material in Air. The trapped field observed in the best 45 mm single-grain puck of Gd-123 was in the range of 1.35 T and 0.35 T at 77.3 K and 87.3 K, respectively. The average trapped field at 77.3 K in the 24 mm diameter NEG-123 samples batch lies between 0.9 and 1 T. The maximum trapped field of 1.2 T was recorded at the sample surface. Further, the maximum trapped field of 0.23 T at 77 K was recorded in a sample with 16 mm diameter of Sm-123 with 3 mol% BaO2 addition. As a result we made more then 130 single grain pucks within a couple of months. Taking advantage of the single grain batch processed material, we constructed self-made chilled levitation disk, which was used on the open day of railway technical research Institute. More then 150 children stood on the levitation disk and revel the experience of levitation. The present results prove that a high-performance good-quality class of LREBa2Cu3Oy material can be made by using a novel thin film Nd-123 seeds.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica C: Superconductivity and its Applications - Volume 471, Issues 21–22, November 2011, Pages 834-839
نویسندگان
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