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Fabrication and superconducting properties of Gd–Ba–Cu–O single-grain bulk with barium cerate addition

✍ Scribed by S. Nariki; N. Sakai; M. Murakami; I. Hirabayashi

Publisher
Elsevier Science
Year
2006
Tongue
English
Weight
199 KB
Volume
445-448
Category
Article
ISSN
0921-4534

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✦ Synopsis

We investigated processing, microstructure and superconducting properties of Gd123 single grain bulk superconductors with a large amount of BaCeO 3 . The melt-textured bulk samples with compositions of Gd123 : BaCeO 3 : Gd211 = 100 : 40Àx : x (x = 0-40) plus 20 wt.% of Ag 2 O and 0.5 wt.% of Pt were fabricated in Ar-1%O 2 gas. The single grain bulk samples 25 and 33 mm in diameters were obtained with the composition of x = 5-40. It was observed that BaCeO 3 particles of 1-2 lm in diameters and Gd211 particles of 0.5-1 lm in diameters were dispersed in the melt-textured samples. Magnetic trapped fields of the 25 mm-sized samples with x = 10-40 were around 1 T at 77 K and the 33 mm-sized sample with x = 20 was 1.4 T at 77 K.

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