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  Home > JCE Print > Journal of Chemical Education > Issues > 2008  > June  >
In the Laboratory
A Simplified Synthetic Experiment of YBa2Cu3O7–x Superconductor for First-Year Chemistry Laboratory
Jui-Lin She and Ru-Shi Liu
Department of Chemistry, National Taiwan University, Taipei, Taiwan, Republic of China
Cover
June 2008
Vol. 85 No. 6
p. 825
Abstract
In this study, a simplified synthetic experiment of YBa2Cu3O7–x (Y-123) superconductor was devised for first-year chemistry laboratory to demonstrate high temperature superconductor and the Meissner effect. The traditional synthetic methods of Y-123 superconductor need repeated grinding and heating in oxygen at high temperature, which are often tedious and time-consuming. In this experiment, a stoichiometric reduced quantity of starting materials was heated in air in a computer-controlled box furnace after grinding and pressing. The black pellet obtained exhibited superconductivity that levitated a magnet to about 4 mm height in liquid nitrogen to demonstrate the Meissner effect. The synthesis of the superconductors can be easily finished in 3-hour laboratory class, and the Meissner effect was tested in the following week. This simplified synthetic experiment of Y-123 superconductor reduces the chemical amount, takes less energy as well as less preparation time, and was successfully carried out by first-year students.
Supplement
Student handouts; Instructor notes
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Contents
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JCE2008p0825W.zip
JCE2008p0825W.doc (Microsoft Word)
More Information
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Citation
She, Jui-Lin; Liu, Ru-Shi. J. Chem. Educ. 2008, 85, 825.
*
Keywords
First-Year Undergraduate / General; Hands-On Learning / Manipulatives; High School / Introductory Chemistry; Laboratory Instruction; Materials Science; Physical Chemistry; Solid State Chemistry; Superconductivity; X-ray Crystallography
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History
Created:
Last Updated:
5/5/2008
5/7/2008
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