Simple and reproducible way to synthesize PrBa2Cu4O8 under 1 atm of oxygen by amorphous citrate method

Masato Kakihana, Shingo Kato, Valery Petrykin, Joakim Bäckström, Lars Börjesson, Minoru Osada

Research output: Contribution to journalArticle

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Abstract

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 °C produced a transparent amorphous citrate `gel' without any precipitation, which after heat-treatment at 450 °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 °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.

Original languageEnglish
Pages (from-to)74-80
Number of pages7
JournalPhysica C: Superconductivity and its Applications
Volume321
Issue number1
DOIs
Publication statusPublished - 1999 Aug 1
Externally publishedYes

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citric acid
Citric acid
citrates
Citric Acid
Oxygen
oxygen
heat treatment
Gels
Heat treatment
gels
Impurities
aqueous solutions
Heating
heat
impurities
heating
Ions
water
Water
ions

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Simple and reproducible way to synthesize PrBa2Cu4O8 under 1 atm of oxygen by amorphous citrate method. / Kakihana, Masato; Kato, Shingo; Petrykin, Valery; Bäckström, Joakim; Börjesson, Lars; Osada, Minoru.

In: Physica C: Superconductivity and its Applications, Vol. 321, No. 1, 01.08.1999, p. 74-80.

Research output: Contribution to journalArticle

Kakihana, Masato ; Kato, Shingo ; Petrykin, Valery ; Bäckström, Joakim ; Börjesson, Lars ; Osada, Minoru. / Simple and reproducible way to synthesize PrBa2Cu4O8 under 1 atm of oxygen by amorphous citrate method. In: Physica C: Superconductivity and its Applications. 1999 ; Vol. 321, No. 1. pp. 74-80.
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