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Ten Minute Preparation Of Yba2Cu3O7−x Using Barium Hydroxide

Published online by Cambridge University Press:  28 February 2011

N. Coppa ,
A. Kebede ,
J. W. Schwegler ,
I. Perez ,
R. E. Salomon ,
G. H. Myer  and
J. E. Crow
N. Coppa
Affiliation:
Center for Materials Research, Temple University, Philadelphia PA 19122
A. Kebede
Affiliation:
Center for Materials Research, Temple University, Philadelphia PA 19122
J. W. Schwegler
Affiliation:
Center for Materials Research, Temple University, Philadelphia PA 19122
I. Perez
Affiliation:
Center for Materials Research, Temple University, Philadelphia PA 19122
R. E. Salomon
Affiliation:
Center for Materials Research, Temple University, Philadelphia PA 19122
G. H. Myer
Affiliation:
Center for Materials Research, Temple University, Philadelphia PA 19122
J. E. Crow
Affiliation:
Center for Materials Research and Technology, Florida State University, Tallahassee, FL 32306–3016
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Abstract

High quality bulk YBa2CuOx−7 was synthesized by fusing stoichiometric amounts of yttrium and copper nitrates and barium hydroxide, in air, using an ordinary Bunsen burner. The starting materials go through a short-lived liquid phase yielding a solid black product which was subsequently heat treated, (900 C, 18–24 h, in air, followed by 500 C, 5 h., in O2). These materials were greater than 99% phase pure with CuO as the only other phase and they exhibited a transition temperature of 92 K, a 15.5% perfect diamagnetic response (field cooled), 76% (zero field cooled). This synthesis represents an improvement over the much more labor and time intensive conventional methods in that it allows high quality materials of various compositions to be prepared quickly

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 180: Symposium A – Better Ceramics Through Chemistry IV , 1990 , 941
Copyright
Copyright © Materials Research Society 1990

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References

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