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Journal of Materials Science

, Volume 30, Issue 5, pp 1391–1396 | Cite as

Perovskite phase formation in the PbMg1/3Nb2/3 O3-PbZrO3-PbTiO3 system by the columbite route

  • M. Villegas
  • J. R. Jurado
  • C. Moure
  • P. Duran
Papers

Abstract

The reaction mechanism of PbMg1/3Nb2/3O3-PbZrO3-PbTiO3 (PMN-PZT) perovskite phase prepared by the columbite route has been studied in the temperature range from 600 to 800 °C. The effects of heating and cooling rate during the calcination of 3PbO +MgNb2O6+PZT powder mixtures have also been investigated. Nearly pure perovskite phase, 0.9 PMN-0.1 PZTsolid solution with no pyrochlore phase, as determined by X-ray diffraction, could be prepared at 800 °C for 2 H. From DTA/TGA, dilatometry and XRD data the reaction mechanism of PMN-PZT solid solution formation could be divided into three steps: (i) decomposition of columbite (MgNb2O6) by reacting with PbO at 350 to 600 °C (ii) the formation of a B-site-deficient pyrochlore phase Pb2Nb1.33Mg0.17O5.50 at close to 650 °C, and (iii) the formation of perovskite phase PMN-PZT solid solution from the reaction of Pb2Nb1.33Mg0.17O5.50 pyrochlore phase with MgO and PZT above 650 °C.

Keywords

Polymer Cool Rate Calcination Perovskite Reaction Mechanism 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Chapman & Hall 1995

Authors and Affiliations

  • M. Villegas
    • 1
  • J. R. Jurado
    • 1
  • C. Moure
    • 1
  • P. Duran
    • 1
  1. 1.Electroceramics DepartmentInstituto de Cerámica y Vidrio (CSIC)MadridSpain

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