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A simple and reprod...
A simple and reproducible way to synthesize PrBa2Cu4O8 under 1 atm of oxygen by amorphous citrate method
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Kakihana, M. (författare)
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Kato, S. (författare)
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Petrykin, V. (författare)
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visa fler...
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Bäckström, Joakim (författare)
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Borjesson, L. (författare)
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Osada, M. (författare)
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visa färre...
- 1999
- 1999
- Engelska.
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Ingår i: Physica. C, Superconductivity. - 0921-4534 .- 1873-2143. ; 321, s. 74-80
- Relaterad länk:
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https://urn.kb.se/re...
Abstract
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- A simple aqueous solution technique utilizing citric acid (CA) as a complexant was applied to prepare PrBa2Cu4O8 (Pr124) at ambient oxygen pressure. Heating of a mixed-solution of CA, water (H2O) and ions of Pr, Ba and Cu with a molar ratio of [CA]:[H2O]:[Pr + Ba + Cu] = 3.6:40:1 on a hot-plate set at 200 degrees C produced a transparent amorphous citrate "gel" without any precipitation, which after heat-treatment at 450 degrees C was converted to a precursor for Pr124. The Pr124 compound with only minor traces of BaCuO2, PrBaO3 and CuO formed after heat-treating the precursor twice at 850 degrees C for 60 h under 1 atm oxygen pressure. The amount of impurities in the citrate-derived Pr124 was approximately half of that in the best sample previously prepared by the more elaborate high-pressure technique. (C) 1999 Elsevier Science B.V. All rights reserved.
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