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Chemical durability of a superconducting oxide YBa2Cu3Ox in aqueous solutions of varying pH values

Authors :
Hiromitsu Kozuka
Sumio Sakka
Kiyotaka Komori
Source :
Journal of Materials Science. 24:1889-1894
Publication Year :
1989
Publisher :
Springer Science and Business Media LLC, 1989.

Abstract

The chemical durability of a superconducting oxide YBa2Cu3Ox in the aqueous solution was investigated as a function of pH value by measuring the amount of leaching of the cations in the solution by inductively coupled plasma (ICP) analysis. The chemical durability of YBa2Cu3Ox was very low in highly acidic solutions of pH ca, 1, where the cations were dissolved in the same cation ratio as that of the compound. In an ion-exchanged water and NaOH solution, barium ions were leached out preferentially and almost no yttrium and copper ions were leached out. When NH4OH was used as a basic reagent, the amounts of barium ions leached out were higher than in the NaOH solution of the same pH value and the dissolution of copper ions was observed, unlike in the NaOH solution of the same pH value. These observations were explained in terms of the chemical stability of individual oxide components.

Details

ISSN :
15734803 and 00222461
Volume :
24
Database :
OpenAIRE
Journal :
Journal of Materials Science
Accession number :
edsair.doi...........35aabc15c42a1f4606819ce22184c714
Full Text :
https://doi.org/10.1007/bf01105719