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  Home > JCE Print > Journal of Chemical Education > Issues > 1995  > September  >
Laboratory Experiments
A Convenient, One-Step Synthesis of YBa2CU3O7-x Superconductors: An Undergraduate Inorganic/Materials Laboratory Experiment
Connie D. Cogdell, Darcey G. Wayment, Dominick J. Casadonte, Jr.
Texas Tech University, Lubbock, TX 79409

Kim A. Kubat-Martin
Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, NM 87545

Cover
September 1995
Vol. 72 No. 9
p. 840
Abstract
The preparation of YBa2Cu3O7-x (Y-123) high-temperature superconductor material generally requires repeated grinding and heating of binary oxide or carbonate reactants to inhibit the formation of the low-melting insulating phases BaCuO2 and Y2BaCuO5 (Y-211). This multiple processing renders the synthesis tedious and somewhat impractical for use in an undergraduate laboratory setting. We describe here a convenient, single-step synthesis of Y-123 from the ternary oxide precursors Y2Cu2O5 and BaCuO2. This reaction can be accomplished in a single 24 hour period and does not suffer from the formation of eutectic phases. The precursor materials can be prepared and stored in advance of the experiment. Students are also exposed to the concepts of ternary phase equilibria and other concepts of modem material processing.
More Information
*  Citation
 Cogdell, Connie D.; Wayment, Darcey G.; Casadonte, Dominick J., Jr.; Kubat-Martin, Kim A. J. Chem. Educ. 1995 72 840.
*  Keywords
*  History
 Created:
Last Updated:		 10/1/1999
5/22/2006
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