Search results for: MORIN TRANSITION

• High-conducting Bi4V2-xFexO11-δ ceramics containing Fe2O3 nanocrystals: Structure and properties

  Publication

  • N. A. Wójcik
  • K. Polcyn
  • J. Karczewski
  • K. Górnicka
  • R. J. Barczyński

  - JOURNAL OF THE EUROPEAN CERAMIC SOCIETY - Year 2022

  The topography, structure, thermal, magnetic, and electrical properties of Bi4V2-xFexO11-δ ceramics substituted with x = 0.5 and 0.7 Fe were studied. The microscope analysis showed the presence of iron-rich nanocrystals formed on the Bi-Fe-V-O grains. The X-ray diffraction studies confirmed that grains are built mostly of tetragonal Bi4V1.5Fe0.5O10.5 phase. Thermal properties analysis showed an order-disorder type γ ↔ γʹ phase...

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• Structure and magnetic properties of BeO-Fe2O3-Al2O3-TeO2 glass-ceramic composites

  Publication

  • N. A. Wójcik
  • N. Tagiara
  • S. Ali
  • K. Górnicka
  • H. Segawa
  • T. Klimczuk
  • B. Jonson
  • D. Möncke
  • E. Kamitsos

  - JOURNAL OF THE EUROPEAN CERAMIC SOCIETY - Year 2021

  In this work, glass-ceramics in the xBeO–20Fe2O3–(80-x)TeO2 system with x = 0–25 mol% were synthesized by the traditional melt quenching route and studied by inductively coupled plasma optical emission spectroscopy, X-ray diffraction, confocal microscopy, infrared and Raman spectroscopy. BeO addition was found to support the crystallization process of Fe2O3 during melting, and an increased BeO content was associated with an increased...

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