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The Synthesis and Performance of MgB2

Published online by Cambridge University Press:  18 March 2011

R. L. Meng ,
B. Lorenz ,
Y. Y. Xue ,
D. Pham ,
J. Cmaidalka ,
J. K. Meen ,
Y. Y. Sun  and
C. W. Chu
R. L. Meng
Affiliation:
Department of Physics and Texas Center for Superconductivity, University of Houston, Houston, TX 77204-5002, U.S.A.
B. Lorenz
Affiliation:
Department of Physics and Texas Center for Superconductivity, University of Houston, Houston, TX 77204-5002, U.S.A.
Y. Y. Xue
Affiliation:
Department of Physics and Texas Center for Superconductivity, University of Houston, Houston, TX 77204-5002, U.S.A.
D. Pham
Affiliation:
Department of Physics and Texas Center for Superconductivity, University of Houston, Houston, TX 77204-5002, U.S.A.
J. Cmaidalka
Affiliation:
Department of Physics and Texas Center for Superconductivity, University of Houston, Houston, TX 77204-5002, U.S.A.
J. K. Meen
Affiliation:
Department of Physics and Texas Center for Superconductivity, University of Houston, Houston, TX 77204-5002, U.S.A.
Y. Y. Sun
Affiliation:
Department of Physics and Texas Center for Superconductivity, University of Houston, Houston, TX 77204-5002, U.S.A.
C. W. Chu
Affiliation:
also at Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, U.S.A.; and Hong Kong University of Science and Technology, Hong Kong
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Abstract

We have studied the kinetics of the chemical reaction between Mg and B by differential thermal analysis. There are two exothermal peaks observed at 500 and 650 °C. We speculate that the first exothermal peak is mainly related to the chemical reaction between Mg and oxygen, forming MgO. The second exothermal peak, which coincides with the melting point of Mg, clearly indicates the chemical reaction between Mg and B. The effect of synthesis conditions and defects on the transport property of MgB2 has been investigated. A correlation between the microstrain, the lattice parameters, and the Mg concentration were observed and are discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 689: Symposium E – Materials for High-Temperature Superconductor Technologies , 2001 , E2.5
Copyright
Copyright © Materials Research Society 2002

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References

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