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Mechanism of Cation Doping by the Soed 2 Method

Published online by Cambridge University Press:  10 February 2011

K. Kamada  and
Y. Matsumoto
K. Kamada
Affiliation:
Department of Applied Chemistry, Faculty of Engineering, Kumamoto University, Kurokami 2-39-1, Kumamoto 860-8555, Japan
Y. Matsumoto
Affiliation:
Department of Applied Chemistry, Faculty of Engineering, Kumamoto University, Kurokami 2-39-1, Kumamoto 860-8555, Japan
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Abstract

Electrochemical cation doping into the YBCO ceramics has been carried out using SOED 2 method (electro-bi-injection). The SOED 2 method consists of the Anode/M-β”-A1203/Ceramics/YSZ/Cathode electrolysis system, where the metal cation M and oxygen anion are simultaneously injected into the oxide ceramics so that electrical neutrality is maintained in the ceramics. YBa2Cu3Oy superconductor was used as the ceramics to be doped. In general, graded doping occurred at a relatively high temperature, because the migration rate of the oxygen anion is close to that of the metal cation in the grain boundaries of the ceramics at high temperature. As a result, the metal cation was graded on the anode side of the YBCO ceramics. The doping situation depended on the electrolysis temperature, the valence of the doped cation. The mechanism of the electro-bi-injection is discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 548: Symposia EE – Solid State Ionics V , 1998 , 473
Copyright
Copyright © Materials Research Society 1999

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References

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