Enhanced Mechanical and Electromechanical Properties of Compositionally Complex Zirconia Zr1-x(Gd1/5Pr1/5Nd1/5Sm1/5Y1/5)xO2−δ Ceramics

Ahsanul Kabir, Bartlomiej Lemieszek, Maxim Varenik, Victor Buratto Tinti, Sebastian Molin, Igor Lubomirsky, Vincenzo Esposito, Frank Kern

Research output: Contribution to journalArticlepeer-review

Abstract

Compositionally complex oxides (CCOs) or high-entropy oxides (HEOs) are new multielement oxides with unexplored physical and functional properties. In this work, we report fluorite structure-derived compositionally complex zirconia with composition Zr1-x(Gd1/5Pr1/5Nd1/5Sm1/5Y1/5)xO2−δ (x = 0.1 and 0.2) synthesized in solid-state reaction route and sintered via hot pressing at 1350 °C. We explore the evolution of these oxides’ structural, microstructural, mechanical, electrical, and electromechanical properties regarding phase separation and sintering mechanisms. Highly dense ceramics are achieved by bimodal mass diffusion, composing nanometric tetragonal and micrometric cubic grains microstructure. The material exhibits an anomalously large electrostriction response exceeding the M33 value of 10-17 m2/V2 at room temperature and viscoelastic properties of primary creep in nanoindentation measurement under fast loading. These findings are strikingly similar to those reported for doped ceria and bismuth oxide derivates, highlighting the presence of a large concentration of point defects linked to structural distortion and anelastic behavior, which are characteristics of nonclassical ionic electrostrictors.

Original languageEnglish
Pages (from-to)12765-12772
Number of pages8
JournalACS applied materials & interfaces
Volume16
Issue number10
DOIs
StatePublished - 13 Mar 2024
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2024 American Chemical Society

Funding

This research was supported by the PRIME program of the German Academic Exchange Service (DAAD) with funds from the German Federal Ministry of Education and Research (BMBF) and the DEMETRA M.ERA-NET project reference number: project10098 (NCN project number 2022/04/Y/ST5/00165).

FundersFunder number
Deutscher Akademischer Austauschdienst
Bundesministerium für Bildung und Forschungproject10098
Narodowe Centrum Nauki2022/04/Y/ST5/00165

    Keywords

    • electrostriction
    • high entropy oxides
    • ionic conductivity
    • microstructure
    • zirconia

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