Recrystallization of YBa2Cu3Ox Superconductors in Vacuum

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YBa2CU3Ox ceramics were recrystallized in vacuum at high temperatures. Recrystallized layers consisting of small grains were observed near the surfaces of the original large-grain 1 2 3 ceramics. The small grains consisted of transformation twins and were identified to orthorhombic 1 2 3 using X-ray diffraction. As vacuum annealing time increased, the thickness of the recrystallized layer increased. The relationship between the thickness and the annealing time showed a linear relationship and an effective diffusion coefficient of 6.25 x 10(-10) cm2s-1. The recrystallized layer showed a critical temperature of 90 K.
Publisher
CHAPMAN HALL LTD
Issue Date
1992-06
Language
ENG
Article Type
Article
Keywords

SYSTEM

Citation

JOURNAL OF MATERIALS SCIENCE, v.27, no.12, pp.3301 - 3304

ISSN
0022-2461
URI
http://hdl.handle.net/10203/1769
Appears in Collection
MS-Journal Papers(저널논문)

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