Correlation between Structure and Electrical Properties of Conventionally Sintered ZrO2-Gd2O3 Ceramics

Authors

  • Nina Obradović Institute of Technical Sciences SASA, Kneza Mihaila 35/IV, 11000 Belgrade, Serbia
  • Jelena Živojinović Institute of Technical Sciences SASA, Kneza Mihaila 35/IV, 11000 Belgrade, Serbia
  • Ana C. Feltrin Materials Research Center, Missouri University of Science and Technology,Rolla, MO 65409, USA
  • Antonije Đorđević Serbian Academy of Sciences and Arts, Kneza Mihaila 35, 11000 Belgrade, Serbia
  • William G. Fahrenholtz Materials Research Center, Missouri University of Science and Technology, Rolla, MO 65409, USA

Abstract

Rare-earth zirconates attract attention as promising materials for the fabrication of thermal barrier coatings, catalysts, sensors, and ionic conductors due to their crystal structure and unique physicochemical properties. Gadolinium zirconate stands out among these compounds owing to its high thermal stability, radiation resistance, chemical stability, etc. In the present study, ZrO2 and Gd2O3 powders were mixed in a molar ratio that corresponds to the compound Gd2Zr2O7, and mechanically activated in a high-energy ball mill for 15, 30, or 60 min. Pellets were then sintered conventionally in air, from 1200–1600 oC for 2 h. Phase composition and microstructure of milled powders and sintered specimens were characterized. Phase-pure Gd2Zr2O7 was obtained after sintering at 1600 oC for non activated powder and at 1400 oC for the powder activated for 60 minutes. Densities and microstructures after sintering were correlated with electrical measurements (dielectric permittivity and loss tangent).

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Published

2026-09-12

Issue

Vol. 58 No. 3 (2026)

Section

Articles

License

This work is licensed under a Creative Commons Attribution 4.0 International License.

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