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Study of the Physical Properties and Electrocaloric Effect in the BaTiO3 Nano- and Microceramics

Kartashev, Anton V. and Bondarev, Vitaly and Flerov, Igor and Gorev, Michail and Pogorel’tsev, Evgeniy I. and Shabanov, Alexander Vasilievich and Molokeev, Maxim Sergeevich and Guillemet, Sophie and Raevskii, Igor P. Study of the Physical Properties and Electrocaloric Effect in the BaTiO3 Nano- and Microceramics. (2019) Physics of the Solid State, 61 (6). 1052-1061. ISSN 1063-7834

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Official URL: https://doi.org/10.1134/S1063783419060088

Abstract

The specific heat, thermal expansion, permittivity, and electrocaloric effect in bulk of BaTiO3 (BT) samples in the form of nano- (nBT-500 nm) and micro- (mBT-1200 nm) ceramics fabricated using spark plasma sintering and solid-state plasma techniques have been investigated. The size effect has been reflected, to a great extent, in the suppression of the specific heat and thermal expansion anomalies and in the changes in the temperatures and entropies of phase transitions and permittivity, and a decrease in the maximum intensive electrocaloric effect: ΔTmaxAD = 29 mK (E = 2.0 kV/cm) for nBT and ΔTmaxAD = 70 mK (E = 2.5 kV/cm) for mBT. The conductivity growth at temperatures above 360 K leads to the significant irreversible heating of the samples due to the Joule heat release in the applied electric field, which dominates over the electrocaloric effect.

Item Type:Article
HAL Id:hal-02409441
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Other partners > Krasnoyarsk State Pedagogical University - KSPU (RUSSIA)
Other partners > Southern Federal University - SFedU (RUSSIA)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > Russian academy of sciences (RUSSIA)
Other partners > Siberian Federal University (RUSSIA)
Laboratory name:
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Deposited On:13 Dec 2019 13:24

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