Improved Non-Piezoelectric Electric Properties Based on La Modulated Ferroelectric-Ergodic Relaxor Transition in (Bi0.5Na0.5)TiO3-Ba(Ti, Zr)O3 Ceramics

The characteristic transition from ferroelectric (FE) to ergodic relaxor (ER) state in (Bi0.5Na0.5)TiO3 (BNT) based lead-free ceramics provides an efficient approach to bring a highly ordered phase back to a disordered one. It woul...

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Autores principales:	Xingru Zhang, Yinan Xiao, Beining Du, Yueming Li, Yuandong Wu, Liyuan Sheng, Wenchang Tan
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	BNT-based lead-free ceramics electric properties ferroelectric to ergodic relaxor state transition La doping 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
Acceso en línea:	https://doaj.org/article/e4e0197848f5427c8721eb13ab7181d9
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spelling	oai:doaj.org-article:e4e0197848f5427c8721eb13ab7181d92021-11-11T18:10:54ZImproved Non-Piezoelectric Electric Properties Based on La Modulated Ferroelectric-Ergodic Relaxor Transition in (Bi<sub>0.5</sub>Na<sub>0.5</sub>)TiO<sub>3</sub>-Ba(Ti, Zr)O<sub>3</sub> Ceramics10.3390/ma142166661996-1944https://doaj.org/article/e4e0197848f5427c8721eb13ab7181d92021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/21/6666https://doaj.org/toc/1996-1944The characteristic transition from ferroelectric (FE) to ergodic relaxor (ER) state in (Bi<sub>0.5</sub>Na<sub>0.5</sub>)TiO<sub>3</sub> (BNT) based lead-free ceramics provides an efficient approach to bring a highly ordered phase back to a disordered one. It would be rational to utilize this transition to improve relevant non-piezoelectric properties based on domain decomposition. In this work, different La contents were introduced to 0.93(Bi<sub>0.5</sub>Na<sub>0.5</sub>)TiO<sub>3</sub>-0.07Ba(Ti<sub>0.945</sub>Zr<sub>0.055</sub>)O<sub>3</sub> ceramics (BNT-BZT-<i>x</i>La) to induce evolution of ergodic degree. The results reveal that with increasing La content, both the FE-ER transition temperature <i>T</i><sub>F-R</sub> and depolarization temperature <i>T</i><sub>d</sub> shift towards room temperature, implying a deepened ergodic degree. By modulation of ergodic degree, thermally stimulated depolarization current experiment shows a higher current density peak, and corresponding pyroelectric coefficient increases from 2.46 to 2.81 μC/(cm<sup>2</sup>∙°C) at <i>T</i><sub>d</sub>. For refrigeration, the indirect measurement demonstrates the Δ<i>T</i> maximum increases from 1.1 K to 1.4 K, indicating an enhanced electrocaloric effect. Moreover, the optimized energy storage effect is observed after La doping. With appearance of “slimmer” <i>P</i>-<i>E</i> loops, both calculated recoverable energy storage density <i>W</i><sub>rec</sub> and storage efficiency <i>η</i> increase to 0.23 J/cm<sup>3</sup> and 22.8%, respectively. These results denote La doping conduces to the improvement of non-piezoelectric properties of BNT-based ceramics in a certain range. Therefore, La doping should be an adopted modification strategy for lead-free ceramics used in areas like refrigerator and pulse capacitors.Xingru ZhangYinan XiaoBeining DuYueming LiYuandong WuLiyuan ShengWenchang TanMDPI AGarticleBNT-based lead-free ceramicselectric propertiesferroelectric to ergodic relaxor state transitionLa dopingTechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 6666, p 6666 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	BNT-based lead-free ceramics electric properties ferroelectric to ergodic relaxor state transition La doping 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	BNT-based lead-free ceramics electric properties ferroelectric to ergodic relaxor state transition La doping 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 Xingru Zhang Yinan Xiao Beining Du Yueming Li Yuandong Wu Liyuan Sheng Wenchang Tan Improved Non-Piezoelectric Electric Properties Based on La Modulated Ferroelectric-Ergodic Relaxor Transition in (Bi<sub>0.5</sub>Na<sub>0.5</sub>)TiO<sub>3</sub>-Ba(Ti, Zr)O<sub>3</sub> Ceramics
description	The characteristic transition from ferroelectric (FE) to ergodic relaxor (ER) state in (Bi<sub>0.5</sub>Na<sub>0.5</sub>)TiO<sub>3</sub> (BNT) based lead-free ceramics provides an efficient approach to bring a highly ordered phase back to a disordered one. It would be rational to utilize this transition to improve relevant non-piezoelectric properties based on domain decomposition. In this work, different La contents were introduced to 0.93(Bi<sub>0.5</sub>Na<sub>0.5</sub>)TiO<sub>3</sub>-0.07Ba(Ti<sub>0.945</sub>Zr<sub>0.055</sub>)O<sub>3</sub> ceramics (BNT-BZT-<i>x</i>La) to induce evolution of ergodic degree. The results reveal that with increasing La content, both the FE-ER transition temperature <i>T</i><sub>F-R</sub> and depolarization temperature <i>T</i><sub>d</sub> shift towards room temperature, implying a deepened ergodic degree. By modulation of ergodic degree, thermally stimulated depolarization current experiment shows a higher current density peak, and corresponding pyroelectric coefficient increases from 2.46 to 2.81 μC/(cm<sup>2</sup>∙°C) at <i>T</i><sub>d</sub>. For refrigeration, the indirect measurement demonstrates the Δ<i>T</i> maximum increases from 1.1 K to 1.4 K, indicating an enhanced electrocaloric effect. Moreover, the optimized energy storage effect is observed after La doping. With appearance of “slimmer” <i>P</i>-<i>E</i> loops, both calculated recoverable energy storage density <i>W</i><sub>rec</sub> and storage efficiency <i>η</i> increase to 0.23 J/cm<sup>3</sup> and 22.8%, respectively. These results denote La doping conduces to the improvement of non-piezoelectric properties of BNT-based ceramics in a certain range. Therefore, La doping should be an adopted modification strategy for lead-free ceramics used in areas like refrigerator and pulse capacitors.
format	article
author	Xingru Zhang Yinan Xiao Beining Du Yueming Li Yuandong Wu Liyuan Sheng Wenchang Tan
author_facet	Xingru Zhang Yinan Xiao Beining Du Yueming Li Yuandong Wu Liyuan Sheng Wenchang Tan
author_sort	Xingru Zhang
title	Improved Non-Piezoelectric Electric Properties Based on La Modulated Ferroelectric-Ergodic Relaxor Transition in (Bi<sub>0.5</sub>Na<sub>0.5</sub>)TiO<sub>3</sub>-Ba(Ti, Zr)O<sub>3</sub> Ceramics
title_short	Improved Non-Piezoelectric Electric Properties Based on La Modulated Ferroelectric-Ergodic Relaxor Transition in (Bi<sub>0.5</sub>Na<sub>0.5</sub>)TiO<sub>3</sub>-Ba(Ti, Zr)O<sub>3</sub> Ceramics
title_full	Improved Non-Piezoelectric Electric Properties Based on La Modulated Ferroelectric-Ergodic Relaxor Transition in (Bi<sub>0.5</sub>Na<sub>0.5</sub>)TiO<sub>3</sub>-Ba(Ti, Zr)O<sub>3</sub> Ceramics
title_fullStr	Improved Non-Piezoelectric Electric Properties Based on La Modulated Ferroelectric-Ergodic Relaxor Transition in (Bi<sub>0.5</sub>Na<sub>0.5</sub>)TiO<sub>3</sub>-Ba(Ti, Zr)O<sub>3</sub> Ceramics
title_full_unstemmed	Improved Non-Piezoelectric Electric Properties Based on La Modulated Ferroelectric-Ergodic Relaxor Transition in (Bi<sub>0.5</sub>Na<sub>0.5</sub>)TiO<sub>3</sub>-Ba(Ti, Zr)O<sub>3</sub> Ceramics
title_sort	improved non-piezoelectric electric properties based on la modulated ferroelectric-ergodic relaxor transition in (bi<sub>0.5</sub>na<sub>0.5</sub>)tio<sub>3</sub>-ba(ti, zr)o<sub>3</sub> ceramics
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/e4e0197848f5427c8721eb13ab7181d9
work_keys_str_mv	AT xingruzhang improvednonpiezoelectricelectricpropertiesbasedonlamodulatedferroelectricergodicrelaxortransitioninbisub05subnasub05subtiosub3subbatizrosub3subceramics AT yinanxiao improvednonpiezoelectricelectricpropertiesbasedonlamodulatedferroelectricergodicrelaxortransitioninbisub05subnasub05subtiosub3subbatizrosub3subceramics AT beiningdu improvednonpiezoelectricelectricpropertiesbasedonlamodulatedferroelectricergodicrelaxortransitioninbisub05subnasub05subtiosub3subbatizrosub3subceramics AT yuemingli improvednonpiezoelectricelectricpropertiesbasedonlamodulatedferroelectricergodicrelaxortransitioninbisub05subnasub05subtiosub3subbatizrosub3subceramics AT yuandongwu improvednonpiezoelectricelectricpropertiesbasedonlamodulatedferroelectricergodicrelaxortransitioninbisub05subnasub05subtiosub3subbatizrosub3subceramics AT liyuansheng improvednonpiezoelectricelectricpropertiesbasedonlamodulatedferroelectricergodicrelaxortransitioninbisub05subnasub05subtiosub3subbatizrosub3subceramics AT wenchangtan improvednonpiezoelectricelectricpropertiesbasedonlamodulatedferroelectricergodicrelaxortransitioninbisub05subnasub05subtiosub3subbatizrosub3subceramics
_version_	1718431916163596288

Improved Non-Piezoelectric Electric Properties Based on La Modulated Ferroelectric-Ergodic Relaxor Transition in (Bi<sub>0.5</sub>Na<sub>0.5</sub>)TiO<sub>3</sub>-Ba(Ti, Zr)O<sub>3</sub> Ceramics

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