A simple method for preparing superconducting FeSe pellets without sealing in evacuated silica tubes

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Abstract

Superconducting tetragonal FeSe pellets were made by reacting mixtures of elemental Fe and Se powders in argon atmosphere without sealing in evacuated silica tubes. A simple tube furnace has been used. Although the tube's material consisted of quartz, an alumina tube could be used as well. X-ray pure samples with onset of superconducting transition between 8.0K and 8.5K were obtained under specific heat treatment conditions. Residual, unreacted Fe particles could be virtually eliminated through prolonged annealing. A key factor for the synthesis of good samples consists in using processing parameters that minimize Se losses.
Original languageEnglish
JournalCeramics International
Volume43
Issue number14
Pages (from-to)11474-11480
ISSN0272-8842
DOIs
Publication statusPublished - 2017

Keywords

  • FeSe
  • Chalcogenides
  • Heat treatment
  • Processing parameters

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