Structure and Dielectric Behavior of Yb<sub>2</sub>O<sub>3</sub>-MgO Co-Doped 0.92BaTiO<sub>3</sub>-0.08(Na<sub>0.5</sub>Bi<sub>0.5</sub>)TiO<sub>3</sub> Ferroelectric Relaxor

Structure and Dielectric Behavior of Yb<sub>2</sub>O<sub>3</sub>-MgO Co-Doped 0.92BaTiO<sub>3</sub>-0.08(Na<sub>0.5</sub>Bi<sub>0.5</sub>)TiO<sub>3</sub> Ferroelectric Relaxor

Dielectric properties and structure of 0.015Yb<sub>2</sub>O<sub>3</sub>-<i>x</i>MgO doped 0.92BaTiO<sub>3</sub>-0.08(Na<sub>0.5</sub>Bi<sub>0.5</sub>)TiO<sub>3</sub> ceramics with <i>x</i> = 0.0–0.025 hav...

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Autores principales: Xiao-Hu Ren, Dong-Yun Gui
Formato: article
Lenguaje:EN
Publicado: MDPI AG 2021
Materias:
ferroelectric relaxor
core–shell structure
Raman spectra
TEM
dielectric properties
Technology
T
Electrical engineering. Electronics. Nuclear engineering
TK1-9971
Engineering (General). Civil engineering (General)
TA1-2040
Microscopy
QH201-278.5
Descriptive and experimental mechanics
QC120-168.85
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spelling oai:doaj.org-article:e6ce29e544e24ec0bac9f8588cee85d42021-11-25T18:13:40ZStructure and Dielectric Behavior of Yb<sub>2</sub>O<sub>3</sub>-MgO Co-Doped 0.92BaTiO<sub>3</sub>-0.08(Na<sub>0.5</sub>Bi<sub>0.5</sub>)TiO<sub>3</sub> Ferroelectric Relaxor10.3390/ma142268021996-1944https://doaj.org/article/e6ce29e544e24ec0bac9f8588cee85d42021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/22/6802https://doaj.org/toc/1996-1944Dielectric properties and structure of 0.015Yb<sub>2</sub>O<sub>3</sub>-<i>x</i>MgO doped 0.92BaTiO<sub>3</sub>-0.08(Na<sub>0.5</sub>Bi<sub>0.5</sub>)TiO<sub>3</sub> ceramics with <i>x</i> = 0.0–0.025 have been investigated. As Yb<sub>2</sub>O<sub>3</sub>-MgO was added into the BT-NBT, the phase changes from tetragonal to pseudo-cubic, with the tetragonality <i>c</i>/<i>a</i> decreases from 1.011 to 1.008 and XRD peaks broadened. The combined study of XRD and TEM image revealed a formation of core–shell structure in grains with core of 400–600 nm and the shell of a thickness 60–200 nm. There is a slowly phase transition against temperature from the variable temperature Raman analysis. The ferroelectric relaxor peak of BT-NBT decreases from ~4000 to ~2000 and a new broad dielectric peak with an equivalent maximum (<i>ε</i><sub>r</sub>′~2300) appears in the temperature dependent dielectric constant curve (<i>ε<sub>r</sub></i>′-<i>T</i>), which produces a flat <i>ε<sub>r</sub></i>′-<i>T</i> curve. Sample 0.92BaTiO<sub>3</sub>-0.08(Na<sub>0.5</sub>Bi<sub>0.5</sub>)TiO<sub>3</sub>-0.015Yb<sub>2</sub>O<sub>3</sub>-0.005 MgO and 0.92BaTiO<sub>3</sub>-0.08(Na<sub>0.5</sub>Bi<sub>0.5</sub>)TiO<sub>3</sub>-0.015Yb<sub>2</sub>O<sub>3</sub>-0.01MgO give a <i>ε</i><sub>r</sub>′ variation within ±14% and ±10% in 20–165 °C. The core–shell microstructure should take account for the flattened <i>ε</i><sub>r</sub>′–<i>T</i> behavior of these samples.Xiao-Hu RenDong-Yun GuiMDPI AGarticleferroelectric relaxorcore–shell structureRaman spectraTEMdielectric propertiesTechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 6802, p 6802 (2021)
institution DOAJ
collection DOAJ
language EN
topic ferroelectric relaxor
core–shell structure
Raman spectra
TEM
dielectric properties
Technology
T
Electrical engineering. Electronics. Nuclear engineering
TK1-9971
Engineering (General). Civil engineering (General)
TA1-2040
Microscopy
QH201-278.5
Descriptive and experimental mechanics
QC120-168.85
spellingShingle ferroelectric relaxor
core–shell structure
Raman spectra
TEM
dielectric properties
Technology
T
Electrical engineering. Electronics. Nuclear engineering
TK1-9971
Engineering (General). Civil engineering (General)
TA1-2040
Microscopy
QH201-278.5
Descriptive and experimental mechanics
QC120-168.85
Xiao-Hu Ren
Dong-Yun Gui
Structure and Dielectric Behavior of Yb<sub>2</sub>O<sub>3</sub>-MgO Co-Doped 0.92BaTiO<sub>3</sub>-0.08(Na<sub>0.5</sub>Bi<sub>0.5</sub>)TiO<sub>3</sub> Ferroelectric Relaxor
description Dielectric properties and structure of 0.015Yb<sub>2</sub>O<sub>3</sub>-<i>x</i>MgO doped 0.92BaTiO<sub>3</sub>-0.08(Na<sub>0.5</sub>Bi<sub>0.5</sub>)TiO<sub>3</sub> ceramics with <i>x</i> = 0.0–0.025 have been investigated. As Yb<sub>2</sub>O<sub>3</sub>-MgO was added into the BT-NBT, the phase changes from tetragonal to pseudo-cubic, with the tetragonality <i>c</i>/<i>a</i> decreases from 1.011 to 1.008 and XRD peaks broadened. The combined study of XRD and TEM image revealed a formation of core–shell structure in grains with core of 400–600 nm and the shell of a thickness 60–200 nm. There is a slowly phase transition against temperature from the variable temperature Raman analysis. The ferroelectric relaxor peak of BT-NBT decreases from ~4000 to ~2000 and a new broad dielectric peak with an equivalent maximum (<i>ε</i><sub>r</sub>′~2300) appears in the temperature dependent dielectric constant curve (<i>ε<sub>r</sub></i>′-<i>T</i>), which produces a flat <i>ε<sub>r</sub></i>′-<i>T</i> curve. Sample 0.92BaTiO<sub>3</sub>-0.08(Na<sub>0.5</sub>Bi<sub>0.5</sub>)TiO<sub>3</sub>-0.015Yb<sub>2</sub>O<sub>3</sub>-0.005 MgO and 0.92BaTiO<sub>3</sub>-0.08(Na<sub>0.5</sub>Bi<sub>0.5</sub>)TiO<sub>3</sub>-0.015Yb<sub>2</sub>O<sub>3</sub>-0.01MgO give a <i>ε</i><sub>r</sub>′ variation within ±14% and ±10% in 20–165 °C. The core–shell microstructure should take account for the flattened <i>ε</i><sub>r</sub>′–<i>T</i> behavior of these samples.
format article
author Xiao-Hu Ren
Dong-Yun Gui
author_facet Xiao-Hu Ren
Dong-Yun Gui
author_sort Xiao-Hu Ren
title Structure and Dielectric Behavior of Yb<sub>2</sub>O<sub>3</sub>-MgO Co-Doped 0.92BaTiO<sub>3</sub>-0.08(Na<sub>0.5</sub>Bi<sub>0.5</sub>)TiO<sub>3</sub> Ferroelectric Relaxor
title_short Structure and Dielectric Behavior of Yb<sub>2</sub>O<sub>3</sub>-MgO Co-Doped 0.92BaTiO<sub>3</sub>-0.08(Na<sub>0.5</sub>Bi<sub>0.5</sub>)TiO<sub>3</sub> Ferroelectric Relaxor
title_full Structure and Dielectric Behavior of Yb<sub>2</sub>O<sub>3</sub>-MgO Co-Doped 0.92BaTiO<sub>3</sub>-0.08(Na<sub>0.5</sub>Bi<sub>0.5</sub>)TiO<sub>3</sub> Ferroelectric Relaxor
title_fullStr Structure and Dielectric Behavior of Yb<sub>2</sub>O<sub>3</sub>-MgO Co-Doped 0.92BaTiO<sub>3</sub>-0.08(Na<sub>0.5</sub>Bi<sub>0.5</sub>)TiO<sub>3</sub> Ferroelectric Relaxor
title_full_unstemmed Structure and Dielectric Behavior of Yb<sub>2</sub>O<sub>3</sub>-MgO Co-Doped 0.92BaTiO<sub>3</sub>-0.08(Na<sub>0.5</sub>Bi<sub>0.5</sub>)TiO<sub>3</sub> Ferroelectric Relaxor
title_sort structure and dielectric behavior of yb<sub>2</sub>o<sub>3</sub>-mgo co-doped 0.92batio<sub>3</sub>-0.08(na<sub>0.5</sub>bi<sub>0.5</sub>)tio<sub>3</sub> ferroelectric relaxor
publisher MDPI AG
publishDate 2021
url https://doaj.org/article/e6ce29e544e24ec0bac9f8588cee85d4
work_keys_str_mv AT xiaohuren structureanddielectricbehaviorofybsub2subosub3submgocodoped092batiosub3sub008nasub05subbisub05subtiosub3subferroelectricrelaxor
AT dongyungui structureanddielectricbehaviorofybsub2subosub3submgocodoped092batiosub3sub008nasub05subbisub05subtiosub3subferroelectricrelaxor
_version_ 1718411473136386048

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