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Enhancement of crystallinity in YBa2Cu3O7−x ceramic by water or NaOH solution attack

✍ Scribed by D. Veretnik; A. Mombru; S. Reich

Book ID
103946967
Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
328 KB
Volume
209
Category
Article
ISSN
0921-4534

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✦ Synopsis

The attack of water or NaOH soluuon on YBa2Cu3OT_zpowder prior to sintering forms large crystallites in the sintered ceramic product. This enhanced crystalhnity y~elds a higher density and larger critical current. The water or NaOH solution treatment of the YBCO powder leads to the formation of a BaO-CuO flux during the smtenng process. Water exposure though destructive to YBCO in general can be used in an advantageous way for preparation of smtered YBCO ceramic material.

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A comparison of fast-neutron irradiation effects on the irreversibility line (IL) and the intragrain critical current densities (J¢) in the 90 K and the 60 K phase of YBa2Cu3OT\_x ( 123 ) and in YBazCu4Os (124) ceramics is presented. The 124 compound shows a transition into the reversible regime at