Author:
Kingon Angus I.,Davis Cheryl D.,Hare Thomas M.,Palmour III Hayne,Koch Carl C.,Haase D.G.
Abstract
AbstractControlled reactions have been undertaken between CO2 and polycrystalline YBa2Cu3O7‐σ in the temperature range 500°‐700°C. Typical reaction products are Y2BaCu05, BaC03 and CuO. Subsequent processing in O2 (e.g. sintering) results in the formation of liquid phases(s) by peritectic reaction at temperatures of 935‐975°C, well below the incongruent melting point of YBa2Cu3O7‐σ (∼1010°C). This “low temperature” liquid phase is shown to have a dramatic influence on the sintering process, and the resulting microstructures. The reactions are difficult to reverse even after extended times at temperatures >900°C. The results give an indication of the effect of adsorbed CO2 into YBa2Cu3O7‐σ powders, albeit on a more localized scale.
Publisher
Springer Science and Business Media LLC
Reference6 articles.
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5. 1 Kingon A.I. , Davis C.D. , Hare T.M. , Lawrence M. , Palmour III H. , Koch C.C. and Haase D.G. , submitted to J. Mat. Res.
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