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Abstrakt
Some oxygen defective fluorites are non-Newnham electrostrictors, i.e., the electromechanical response does not depend on their dielectric properties. Here, we show gigantic electrostriction in nanocrystalline 25 mol% praseodymium doped ceria (PCO) bulk ceramics. The material was fabricated with a fieldassisted spark plasma sintering (SPS) process from high-purity nanoscale PCO powders (<20 nm). The SPS process consolidates the powders into a single-phase, highly dense material with a homogeneous microstructure and large grain boundary extension. Various thermally and chemically stable ionic defects are incorporated into the nanostructure, leading to superior electrical conductivity. The material shows an electrostriction strain coefficient (M33) of ∼10−16 m2 V−2 at frequencies below 100 Hz at room temperature. Such performance is comparable and even superior to Newnham’s electrostrictors, such as ferroelectric ceramics and polymeric actuators. Comparative analysis with polycrystals suggests that nanostructured PCO possesses electromechanically active nanodomains of Pr3+–VO pairs. Such results are unexpected and open novel insights on non-Newnham electrostrictors
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Autorzy (5)
-
Victor Buratto Tinti
-
Ahsanul Kabir
-
Jin Kyu Han
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Vincenzo Esposito
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Informacje szczegółowe
- Kategoria:
- Publikacja w czasopiśmie
- Typ:
- artykuły w czasopismach
- Opublikowano w:
-
NANOSCALE
nr 13,
strony 7583 - 7589,
ISSN: 2040-3364 - Język:
- angielski
- Rok wydania:
- 2021
- Opis bibliograficzny:
- Tinti V. B., Kabir A., Han J. K., Molin S., Esposito V.: Gigantic electro-chemo-mechanical properties of nanostructured praseodymium doped ceria// NANOSCALE -Vol. 13,iss. 16 (2021), s.7583-7589
- DOI:
- Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.1039/d1nr00601k
- Weryfikacja:
- Politechnika Gdańska
wyświetlono 104 razy
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