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Enhanced Mechanical and Electromechanical Properties of Compositionally Complex Zirconia Zr1–x(Gd1/5Pr1/5Nd1/5Sm1/5Y1/5)xO2−δ Ceramics
Abstract
Compositionally complex oxides (CCOs) or high-entropy oxides (HEOs) are new multi-element 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 m 2 /V2 at room temperatures 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 are characteristics of nonclassical ionic electrostrictors.
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Authors (8)
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Ahsanul Kabir
-
Maxim Varenik
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Victor Buratto Tinti
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Igor Lubomirsky
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Vincenzo Esposito
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Frank Kern
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Details
- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
-
ACS Applied Materials & Interfaces
no. 16,
pages 12765 - 12772,
ISSN: 1944-8244 - Language:
- English
- Publication year:
- 2024
- Bibliographic description:
- Kabir A., Lemieszek B., Varenik M., Buratto Tinti V., Molin S., Lubomirsky I., Esposito V., Kern F.: Enhanced Mechanical and Electromechanical Properties of Compositionally Complex Zirconia Zr1–x(Gd1/5Pr1/5Nd1/5Sm1/5Y1/5)xO2−δ Ceramics// ACS Applied Materials & Interfaces -Vol. 16,iss. 10 (2024), s.12765-12772
- DOI:
- Digital Object Identifier (open in new tab) 10.1021/acsami.3c17501
- Sources of funding:
- Verified by:
- Gdańsk University of Technology
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