Work

Non-classical electromechanical behavior in multi-cation stabilized zirconia (Yb0.04Y0.04Gd0.04Nb0.10-Zr0.78O2-δ) ceramics

Year: 2025

Type: article

Abstract: This work aims to investigate the electromechanical properties of a new mixed tetragonal-cubic composition: multi-cation stabilized tetragonal zirconia polycrystal (MC-TZP) ceramics, stabilized by 2 mol% Yb 2 O 3 –2 mol% Y 2 O 3 –2 mol% Gd 2 O 3 –5 mol% Nb 2 O 5 . The evolution of microstructure, dielectric, mechanical, and ferroelastic properties was also characterized. The MC-TZP powder was synthesized by solid-state reaction and then consolidated by two sintering methods, i.e., hot pressing and conventional sintering. Hot pressing produced an ultrafine microstructure with small grains, while conventional sintering resulted in larger grains. Both ceramics samples exhibit large longitudinal electrostrictive (M 33 ≥ 1 * 10 -17 m 2 /V 2 ) coefficients at 1 Hz and a typical frequency-related relaxation effect, with the hot-pressed material demonstrating a relatively higher M 33 value. This enhancement correlates with improved electrical properties, characterized by a higher dielectric constant and electrical conductivity compared to the conventionally sintered counterpart.

Source: Journal of the European Ceramic Society

DOI: 10.1016/j.jeurceramsoc.2025.117568

Authors: Ahsanul Kabir, Anna Lavie, Victor Buratto Tinti, Vincenzo Esposito, Frank Kern

Institutions: University of Stuttgart, Technical University of Denmark, Weizmann Institute of Science

Language: English

Topic: Ferroelectric and Piezoelectric Materials

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,900

Funders: Deutscher Akademischer Austauschdienst, Bundesministerium für Bildung und Forschung