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Hg–Ba–Ca–Cu–O system phase diagram and the formation of HgBa2Can−1CunO2n+2+δ superconducting phases

Published online by Cambridge University Press:  03 March 2011

G.C. Che ,
Y.K. Du ,
C. Dong ,
F. Wu  and
Z.X. Zhao
G.C. Che
Affiliation:
National Laboratory for Superconductivity, Institute of Physics, Academia Sinica, Beijing 100080, People's Republic of China
Y.K. Du
Affiliation:
National Laboratory for Superconductivity, Institute of Physics, Academia Sinica, Beijing 100080, People's Republic of China
C. Dong
Affiliation:
National Laboratory for Superconductivity, Institute of Physics, Academia Sinica, Beijing 100080, People's Republic of China
F. Wu
Affiliation:
National Laboratory for Superconductivity, Institute of Physics, Academia Sinica, Beijing 100080, People's Republic of China
Z.X. Zhao
Affiliation:
National Laboratory for Superconductivity, Institute of Physics, Academia Sinica, Beijing 100080, People's Republic of China
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Abstract

The Hg-Ba-Ca-Cu-O system phase diagram and the formation of HgBa2Can-1CunO2n+2+δ superconducting phases have been investigated by XRD (x-ray diffraction). The isothermal sections of the HgO-BaO-CuO system at 800 °C and the BaO-CaO-CuO system at 870 °C are presented. HgBa2Can-1CunO2n+2+δ superconducting phases are formed through the reactions of HgO with intermediate products Ba2CuO3 + BaCuO2 + CaO, BaCuO2 + CaO2, and BaCuO2 + Ca2CuO3 for n = 1, 2, and 3 phases, respectively.

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Articles
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Journal of Materials Research , Volume 10 , Issue 6 , June 1995 , pp. 1358 - 1361
Copyright
Copyright © Materials Research Society 1995

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