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Influence of Synthesis-Related Microstructural Features on the Electrocaloric Effect for 0.9Pb(Mg1/3Nb2/3)O3−0.1PbTiO3 Ceramics

Uršič, Hana ; Vrabelj, Marko ; Otoničar, Mojca ; Fulanović, Lovro ; Rožič, Brigita ; Kutnjak, Zdravko ; Bobnar, Vid ; Malič, Barbara (2022)
Influence of Synthesis-Related Microstructural Features on the Electrocaloric Effect for 0.9Pb(Mg1/3Nb2/3)O3−0.1PbTiO3 Ceramics.
In: Crystals, 2022, 11 (4)
doi: 10.26083/tuprints-00019541
Article, Secondary publication, Publisher's Version

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Item Type: Article
Type of entry: Secondary publication
Title: Influence of Synthesis-Related Microstructural Features on the Electrocaloric Effect for 0.9Pb(Mg1/3Nb2/3)O3−0.1PbTiO3 Ceramics
Language: English
Date: 2 February 2022
Place of Publication: Darmstadt
Year of primary publication: 2022
Publisher: MDPI
Journal or Publication Title: Crystals
Volume of the journal: 11
Issue Number: 4
Collation: 12 Seiten
DOI: 10.26083/tuprints-00019541
Corresponding Links:
Origin: Secondary publication DeepGreen
Abstract:

Despite having a very similar electrocaloric (EC) coefficient, i.e., the EC temperature change divided by the applied electric field, the 0.9Pb(Mg1/3Nb2/3)O3–0.1PbTiO3 (PMN-10PT) ceramic prepared by mechanochemical synthesis exhibits a much higher EC temperature change than the columbite-derived version, i.e., 2.37 °C at 107 °C and 115 kV/cm. The difference is due to the almost two-times-higher breakdown field of the former material, 115 kV/cm, as opposed to 57 kV/cm in the latter. While both ceramic materials have similarly high relative densities and grain sizes (>96%, ≈5 µm) and an almost correct perovskite stoichiometry, the mechanochemical synthesis contributes to a lower level of compositional deviation. The peak permittivity and saturated polarization are slightly higher and the domain structure is finer in the mechanochemically derived ceramic. The secondary phases that result from each synthesis are identified and related to different interactions of the individual materials with the electric field: an intergranular lead-silicate-based phase in the columbite-derived PMN-10PT and MgO inclusions in the mechanochemically derived ceramic

Uncontrolled Keywords: PMN-PT, mechanochemical synthesis, columbite synthesis, electrocaloric effect, electric breakdown field, microstructure
Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-195411
Classification DDC: 500 Science and mathematics > 500 Science
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials
Date Deposited: 02 Feb 2022 13:20
Last Modified: 14 Nov 2023 19:04
SWORD Depositor: Deep Green
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/19541
PPN: 505615169
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