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High-temperature phase equilibria near YBa2Cu3O6+x

✍ Scribed by B.T. Ahn; V.Y. Lee; R. Beyers; T.M. Gür; R.A. Huggins

Publisher
Elsevier Science
Year
1989
Tongue
English
Weight
132 KB
Volume
162-164
Category
Article
ISSN
0921-4534

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✦ Synopsis

The quaternary phase relations near YBa2Cu306+ x were investigated using a solid-state ionic technique. Three invariant reactions were discovered. At 850°C, YBa2Cu306+ x with excess Cu, O reacts to form Y2BaC'uO5 and BaCu202 at lxl0 "3 arm oxygen , while pure YBa2Cu306+ x decomposes to Y2"~CuO5, BaCu202, and YBa3Cu206 (;).x at 4x10 "t atm oxygen. These results show that the phase relations near YBa2CthO6+ x change markedly with oxygen pressure.

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