Home Technology Subsolidus phase equilibria in the CeO2−x–SiO2–ZrO2 system: An experimental study
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Subsolidus phase equilibria in the CeO2−x–SiO2–ZrO2 system: An experimental study

  • Slavica Zec , Snežvana Bošković , Nada Popovic and Žvarko Bogdanov
Published/Copyright: May 31, 2013
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 97 Issue 5

Abstract

The phase equilibria in the CeO2–x–SiO2–ZrO2 system were studied in the subsolidus region in argon atmosphere, under isothermal heating and hot pressing, at 1400°C, different ceria, silica, and zirconia mixtures. X-ray diffraction (XRD), scanning electron microscopy (SEM) and electron probe microanalysis (EPMA) were performed to identify phases and to establish phase equilibria. Based on the results of many preliminarily investigated ternary compositions, possible tie lines are predicted. Compositions from the proposed tie lines were successively fired and ground until the changes of the phase compositions were not detected or were low enough to be neglected. Phases identified in these compositions confirmed the existence of five tie lines: Ce2Si2O7–ZrSiO4, Ce2Si2O7–ZrO2, Ce4.67(SiO4)3O–ZrO2, Ce4.67(SiO4)3O–Ce2Zr2O7 and Ce2SiO5–Ce2Zr2O7, which divide the CeO2–x–SiO2–ZrO2 composition triangle into six compatibility triangles. The formation of ternary compounds or ternary solid solutions in the CeO2–x–SiO2–ZrO2 system was not observed. The monoclinic high temperature polymorph of Ce2Si2O7 was detected. The cubic pyrochlore phases had different lattice parameters, caused by incomplete reduction of the tetravalent cerium ions also observed in the non-stoichiometric cerium oxide.

Keywords: CeO2–x–SiO2–ZrO2 system; Phase equilibria; Tie lines
* Correspondence address: Dr. Snezana Bošvković, Institute of Nuclear Sciences Vinca, Materials Science Laboratory, 1001 Belgrade, Mihajla Petrovica Alasa 12–14, Serbia & Montenegro, Tel.: +381112439454, Fax: +381112439454. E-mail:

Dedicated to Professor Dr. Fritz Aldinger on the occasion of his 65th birthday

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Received: 2005-12-18
Accepted: 2006-2-8
Published Online: 2013-05-31
Published in Print: 2006-05-01

© 2006, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.101274
Keywords for this article
CeO2–x–SiO2–ZrO2 system; Phase equilibria; Tie lines

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. Editorial
  5. Basic
  6. Three-dimensional printing of TiAl3/Al2O3 composites
  7. Microemulsion mediated synthesis of nanocrystalline BaTiO3: possibilities, potential and perspectives
  8. Solid-State 17O NMR studies on Yttria-stabilized zirconia
  9. Twinning in ultrathin silicon nanowires
  10. Re-optimization of the Mg–Sb system under topological constraints
  11. Mg-rich phase equilibria of Mg–Mn–Zn alloys analyzed by computational thermochemistry
  12. The In–Pt–Sb phase diagram
  13. Thermodynamic evaluation of the Al–Cr–C system
  14. Thermodynamic description of the Ni–Si–Ti ternary system
  15. Enthalpies of formation measurements and thermodynamic description of the Ag–Cu–Zn system
  16. Thermodynamic assessment of the Mn–Cr–O system for solid oxide fuel cell (SOFC) materials
  17. Subsolidus phase equilibria in the CeO2−x–SiO2–ZrO2 system: An experimental study
  18. Generalized Maugis–Dugdale model of an elastic cylinder in non-slipping adhesive contact with a stretched substrate
  19. Implications of linear relationships between local and macroscopic flow stresses in the composite model
  20. Applied
  21. Gas-phase surface alloying under “kinetic control”: A novel approach to improving the surface properties of titanium alloys
  22. Thin film formation by oriented attachment of polymer-capped nanocrystalline ZnO
  23. The sintering mechanism and microstructure evolution in SiC–AlN ceramics studiedby EFTEM
  24. Thermal evolution of free volumes and of crystallization in amorphous Si–B–C–N ceramics
  25. High-temperature deformation behavior of nanocrystalline precursor-derived Si–B–C–N ceramics in controlled atmosphere
  26. Nanopowder dispersion and spray-drying process: the case of Cr2O3
  27. Electroless deposition of brushite (CaHPO4 · 2H2O) crystals on Ti–6Al–4V at room temperature
  28. The role of chemisorbed anions in the aqueous processing of AlN powder
  29. The influence of porosity on the electrical properties of liquid-phase sintered silicon carbide
  30. Development of high-temperature thermoelectric materials based on SrTiO3-layered perovskites
  31. The influence of the preparation method on the microstructure and properties of Al2O3/TiN nanocomposites
  32. Infrared properties of sintered α-MnSe
  33. Quasi-equilibrium sintering of particle clusters containing Bernal holes
  34. Design of metal ceramic composites
  35. Notifications
  36. DGM News
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