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Fabrication of Electrochemical Ceramic Membrane with Assistance of Metallization by the Electroless-plating Technique

Published online by Cambridge University Press:  11 February 2011

Y-Y. Liu ,
L. Hong ,
Z-C. Shao  and
H-X. Jiang
Y-Y. Liu
Affiliation:
Department of Chemical & Environmental Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260
L. Hong
Affiliation:
Institute of Materials Research & Engineering, 3 Research Link, Singapore 117602
Z-C. Shao
Affiliation:
Institute of Materials Research & Engineering, 3 Research Link, Singapore 117602
H-X. Jiang
Affiliation:
Institute of Materials Research & Engineering, 3 Research Link, Singapore 117602
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Abstract

This work developed a metal-reinforced ceramic membrane processing approach [by using perovskite La0.2Sr0.8 CoO3-x (LSCO-80) as the model membrane] with the aim of overcoming the membrane-cracking problem. A thin layer of Ag/Pd alloy was incorporated into the LSCO-80 membrane made by dip coating and sintering. It is not viable to obtain a Pd/Ag alloy film using the co-plating method because Ag+ ion strongly inhibits chemical reduction of Pd2+ ion, and the alkaline plating bath causes severe etching of LSCO-80. This obstacle was circumvented through a layer-by-layer deposition procedure, in which Ag and Pd layers were deposited subsequently onto LSCO membrane. The Ag and Pd layers undergo alloying when the laminar structure was subjected to calcinations at 1000°C. It was found that the Pd/Ag alloy drifts beneath into pores in the LSCO layer. The resultant metal-ceramic composite membrane shows excellent structural integrity and free of micro-cracks.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 752: Symposium AA – Membranes–Preparation, Properties and Applications , 2002 , AA8.1
Copyright
Copyright © Materials Research Society 2003

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References

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