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Journal of Materials Science

, Volume 30, Issue 5, pp 1321–1326 | Cite as

Sintering and compensation effect of donor and acceptor codoped 3 mol% Y2O3-ZrO2

  • San-Yuan Chen
  • Hong-Yang Lu
Papers

Abstract

Addition of 0.15–0.5 mol% acceptor oxide, Al2O3, to 3 mol% Y2O3-ZrO2 results in enhanced densification at 1350°C. The enhancement is accounted for by a liquid phase sintering mechanism. While the addition of donor oxide, Ta2O5, of 0.15–2.5 mol% at 1300–1600°C results in the decrease of final density and in the destabilization of the tetragonal (t) phase of the 3 mol% Y2O3-t-ZrO2 (TZP). X-ray diffractometry (XRD) reveals that the Ta2O5-added 3 mol% Y2O3-ZrO2 contains monoclinic (m) ZrO2 phase and a second Ta2Zr6O17 phase. The decrease is attributed to the increase of m-ZrO2 content in these samples. Complete phase transformation from t-ZrO2 to m-ZrO2 observed in samples added with 2.5 mol% Ta2O5 is interpreted by the compensation effect based on donor and acceptor codoping defect chemistry.

Keywords

Oxide Polymer Al2O3 Liquid Phase Phase Transformation 
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

  • San-Yuan Chen
    • 1
  • Hong-Yang Lu
    • 2
  1. 1.Department of Materials Science and EngineeringThe University of MichiganAnn ArborUSA
  2. 2.Institute of Materials Science and EngineeringNational Sun Yat-Sen UniversityKaohsiungTaiwan

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