Electrical and mechanical properties of cubic stabilized ZrO2 with Sc2O3

Hiromichi Yasuda; Masato Uehara; Naoya Enomoto; Junichi Hojo

doi:10.14853/pcersj.2002F.0.142.0

15th Fall Meeting of The Ceramic Society of Japan

DOI https://doi.org/10.14853/pcersj.2002F.0.142.0

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Host: The Ceramic Society of Japan

Electrical and mechanical properties of cubic stabilized ZrO₂ with Sc₂O₃

Hiromichi Yasuda, Masato Uehara, Naoya Enomoto, Junichi Hojo

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Keywords: cubic stabilized zirconia, fracture toughness, pressureless sintering, ionic conductivity, crystal phase, lattice constant

CONFERENCE PROCEEDINGS FREE ACCESS

Pages 142

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Abstract

It has been reported that Sc -doped ZrO₂ exhibits the highest ionic conductivity among ZrO₂ ceramics. Sc₂O₃ -added 3YSZ powder was prepared by homogeneous precipitation using urea. The powder was sintered at 1500°C in air. Ionic conductivity was evaluated by DC four terminal method, and fracture toughness by IF method. Mixture of cubic and tetragonal phases was observed in all samples by XRD, and content of cubic phase increased with increasing Sc₂O₃. Sc₂O₃ -added 3YSZ indicated high ionic conductivity and fracture toughness compare to 8YSZ.

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