A contribution to the study of the Hg-Ba-Cu-O system

G. A. Costa, M. M. Carnasciali, A. Farnè, Paolo Mele

Research output: Contribution to journalArticle

Abstract

This work aims to contribute to the study of the Hg-Ba-Cu-O diagram. Generally, we can see that high-temperature superconductor phase diagrams are far from complete. Of these, the Hg-Ba-Cu-O diagram is very interesting owing to the high mercury fugacity. However, to study this diagram it is necessary to control both the mercury and the oxygen activities. The importance of this check is evident in the preparation of single-phase samples, where competitive phases are often obtained; knowledge of these phases will provide an improvement. Even the famous superconductor phase HgBa2CuO4+δ is still the subject of discussion. To study these compounds, thermogravimetric and differential thermal analyses, X-ray diffractometry, scanning electron microscopy and oxygen titration are the most important analyses. In particular, we applied the well known effusion technique, a programmed decomposition by the saturated vapour method, rarely used for this purpose.

Original languageEnglish
Pages (from-to)1083-1092
Number of pages10
JournalPhilosophical Magazine B: Physics of Condensed Matter; Statistical Mechanics, Electronic, Optical and Magnetic Properties
Volume80
Issue number5
DOIs
Publication statusPublished - 2000 Jan 1
Externally publishedYes

Fingerprint

Mercury
diagrams
Oxygen
High temperature superconductors
Titration
X ray diffraction analysis
Superconducting materials
Phase diagrams
Vapors
oxygen
Decomposition
high temperature superconductors
titration
Scanning electron microscopy
phase diagrams
vapors
decomposition
preparation
scanning electron microscopy
x rays

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Physics and Astronomy(all)

Cite this

A contribution to the study of the Hg-Ba-Cu-O system. / Costa, G. A.; Carnasciali, M. M.; Farnè, A.; Mele, Paolo.

In: Philosophical Magazine B: Physics of Condensed Matter; Statistical Mechanics, Electronic, Optical and Magnetic Properties, Vol. 80, No. 5, 01.01.2000, p. 1083-1092.

Research output: Contribution to journalArticle

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