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Crossover from Ferroelectric to Relaxor Behavior in Ba(1−x)Ca(x)TiO(3) (x = 0.17) System

The dielectric properties of Ba(1−x)Ca(x)TiO(3) (x = 0.17) ceramics were studied in a wide frequency range of 20 Hz–53 GHz. Diffused ferroelectric phase transition was revealed close to 339 K in the dielectric properties of ceramics. The behaviour of distributions of relaxation times in vicinity of...

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Autores principales: Palaimiene, Edita, Macutkevic, Jan, Banys, Juras, Winiarski, Antoni, Gruszka, Irena, Koperski, Janusz, Molak, Andrzej
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7345356/
https://www.ncbi.nlm.nih.gov/pubmed/32630508
http://dx.doi.org/10.3390/ma13122854
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author Palaimiene, Edita
Macutkevic, Jan
Banys, Juras
Winiarski, Antoni
Gruszka, Irena
Koperski, Janusz
Molak, Andrzej
author_facet Palaimiene, Edita
Macutkevic, Jan
Banys, Juras
Winiarski, Antoni
Gruszka, Irena
Koperski, Janusz
Molak, Andrzej
author_sort Palaimiene, Edita
collection PubMed
description The dielectric properties of Ba(1−x)Ca(x)TiO(3) (x = 0.17) ceramics were studied in a wide frequency range of 20 Hz–53 GHz. Diffused ferroelectric phase transition was revealed close to 339 K in the dielectric properties of ceramics. The behaviour of distributions of relaxation times in vicinity of the ferroelectric phase transition temperature is also typical for order-disorder ferroelectric phase transition. However, at lower temperatures (below 200 K), the most probable relaxation increased according to the Arrhenius law. At lower temperatures the maximum of the imaginary part of dielectric permittivity versus temperature strongly shifted to higher temperatures when the frequency increased (from 125 K at 1.21 kHz to 300 K at 33 GHz). This behaviour was attributed to the dynamics of Ti ions. The origin of the crossover from ferroelectric to relaxor behaviour of Ba(1−x)Ca(x)TiO(3) (x = 0.17) ceramics is discussed in the paper.
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spelling pubmed-73453562020-07-09 Crossover from Ferroelectric to Relaxor Behavior in Ba(1−x)Ca(x)TiO(3) (x = 0.17) System Palaimiene, Edita Macutkevic, Jan Banys, Juras Winiarski, Antoni Gruszka, Irena Koperski, Janusz Molak, Andrzej Materials (Basel) Article The dielectric properties of Ba(1−x)Ca(x)TiO(3) (x = 0.17) ceramics were studied in a wide frequency range of 20 Hz–53 GHz. Diffused ferroelectric phase transition was revealed close to 339 K in the dielectric properties of ceramics. The behaviour of distributions of relaxation times in vicinity of the ferroelectric phase transition temperature is also typical for order-disorder ferroelectric phase transition. However, at lower temperatures (below 200 K), the most probable relaxation increased according to the Arrhenius law. At lower temperatures the maximum of the imaginary part of dielectric permittivity versus temperature strongly shifted to higher temperatures when the frequency increased (from 125 K at 1.21 kHz to 300 K at 33 GHz). This behaviour was attributed to the dynamics of Ti ions. The origin of the crossover from ferroelectric to relaxor behaviour of Ba(1−x)Ca(x)TiO(3) (x = 0.17) ceramics is discussed in the paper. MDPI 2020-06-25 /pmc/articles/PMC7345356/ /pubmed/32630508 http://dx.doi.org/10.3390/ma13122854 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Palaimiene, Edita
Macutkevic, Jan
Banys, Juras
Winiarski, Antoni
Gruszka, Irena
Koperski, Janusz
Molak, Andrzej
Crossover from Ferroelectric to Relaxor Behavior in Ba(1−x)Ca(x)TiO(3) (x = 0.17) System
title Crossover from Ferroelectric to Relaxor Behavior in Ba(1−x)Ca(x)TiO(3) (x = 0.17) System
title_full Crossover from Ferroelectric to Relaxor Behavior in Ba(1−x)Ca(x)TiO(3) (x = 0.17) System
title_fullStr Crossover from Ferroelectric to Relaxor Behavior in Ba(1−x)Ca(x)TiO(3) (x = 0.17) System
title_full_unstemmed Crossover from Ferroelectric to Relaxor Behavior in Ba(1−x)Ca(x)TiO(3) (x = 0.17) System
title_short Crossover from Ferroelectric to Relaxor Behavior in Ba(1−x)Ca(x)TiO(3) (x = 0.17) System
title_sort crossover from ferroelectric to relaxor behavior in ba(1−x)ca(x)tio(3) (x = 0.17) system
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7345356/
https://www.ncbi.nlm.nih.gov/pubmed/32630508
http://dx.doi.org/10.3390/ma13122854
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