Optimized dielectric energy storage performance in ZnO-modified Bi0.5Na0.5TiO3-Sr0.7Bi0.2□0.1TiO3 ceramics with composite structure and element segregation

IF 12.5 1区工程技术 Q1 ENGINEERING, CHEMICAL

Chemical Engineering Journal Pub Date : 2023-02-15 Epub Date: 2023-01-13 DOI:10.1016/j.cej.2023.141449

Xuefan Zhou , Guoliang Xue , Yingchun Su , Hang Luo , Yan Zhang , Dawei Wang , Dou Zhang

{"title":"Optimized dielectric energy storage performance in ZnO-modified Bi0.5Na0.5TiO3-Sr0.7Bi0.2□0.1TiO3 ceramics with composite structure and element segregation","authors":"Xuefan Zhou , Guoliang Xue , Yingchun Su , Hang Luo , Yan Zhang , Dawei Wang , Dou Zhang","doi":"10.1016/j.cej.2023.141449","DOIUrl":null,"url":null,"abstract":"<div>In this work, ZnO is introduced into the 0.55Bi0.5Na0.5TiO3-0.45Sr0.7Bi0.2□0.1TiO3 (BNT-SBT) to optimize the dielectric energy storage performance. ZnO is not only used as a sintering aid to decrease the sintering temperature and ceramic grain size, but also enhances the random fields and polar nanoregions activity in the ceramics by Zn2+ doping. Intriguingly, the ZnO-modified BNT-SBT ceramics present a 0–3 type composite structure containing the TiZn2O4 and Bi2Ti2O7 linear dielectrics. Moreover, obvious element segregation is generated in the BNT-based matrix grains showing different Sr2+/(Bi3+, Na+) ratios and polarization magnitudes. The significant variations in composition distribution, grain and domain configurations cause the overall optimization of energy storage properties, reflected in the enhanced breakdown strength, delayed polarization saturation, and reduced polarization hysteresis. As a result, the optimized Wrec ∼ 5.84 J/cm3 and η ∼ 93 % at 40 kV/mm is obtained in the BNT-SBT-0.10ZnO ceramic, superior to that of the BNT-SBT ceramic (Wrec ∼ 3.35 J/cm3 and η ∼ 89 % at 28 kV/mm).</div>","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"458 ","pages":"Article 141449"},"PeriodicalIF":12.5000,"publicationDate":"2023-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"10","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Chemical Engineering Journal","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1385894723001808","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2023/1/13 0:00:00","PubModel":"Epub","JCR":"Q1","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}

引用次数: 10

Abstract

In this work, ZnO is introduced into the 0.55Bi_0.5Na_0.5TiO₃-0.45Sr_0.7Bi_0.2□_0.1TiO₃ (BNT-SBT) to optimize the dielectric energy storage performance. ZnO is not only used as a sintering aid to decrease the sintering temperature and ceramic grain size, but also enhances the random fields and polar nanoregions activity in the ceramics by Zn²⁺ doping. Intriguingly, the ZnO-modified BNT-SBT ceramics present a 0–3 type composite structure containing the TiZn₂O₄ and Bi₂Ti₂O₇ linear dielectrics. Moreover, obvious element segregation is generated in the BNT-based matrix grains showing different Sr²⁺/(Bi³⁺, Na⁺) ratios and polarization magnitudes. The significant variations in composition distribution, grain and domain configurations cause the overall optimization of energy storage properties, reflected in the enhanced breakdown strength, delayed polarization saturation, and reduced polarization hysteresis. As a result, the optimized W_rec ∼ 5.84 J/cm³ and η ∼ 93 % at 40 kV/mm is obtained in the BNT-SBT-0.10ZnO ceramic, superior to that of the BNT-SBT ceramic (W_rec ∼ 3.35 J/cm³ and η ∼ 89 % at 28 kV/mm).

Abstract Image

查看原文本刊更多论文

具有复合结构和元素偏析的zno改性Bi0.5Na0.5TiO3-Sr0.7Bi0.2□0.1TiO3陶瓷的介电储能性能优化

本文将ZnO引入到0.55Bi0.5Na0.5TiO3-0.45Sr0.7Bi0.2□0.1TiO3 (BNT-SBT)中，优化其介电储能性能。ZnO作为助烧剂不仅可以降低烧结温度，降低陶瓷晶粒尺寸，还可以通过掺杂Zn2+增强陶瓷中的随飞机场和极性纳米区活性。有趣的是，zno改性的BNT-SBT陶瓷呈现出含有TiZn2O4和Bi2Ti2O7线性介电体的0-3型复合结构。bnt基基体晶粒中存在明显的元素偏析，呈现出不同的Sr2+/(Bi3+， Na+)比和极化幅度。组分分布、晶粒和畴结构的显著变化导致储能性能的整体优化，表现为击穿强度增强、极化饱和延迟和极化滞后降低。结果表明，在40 kV/mm下，BNT-SBT-0.10 zno陶瓷的wre ~ 5.84 J/cm3和η ~ 93%优于BNT-SBT陶瓷(wre ~ 3.35 J/cm3和28 kV/mm下η ~ 89%)。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Chemical Engineering Journal 工程技术-工程：化工

CiteScore

21.70

自引率

9.30%

发文量

6781

审稿时长

2.4 months

期刊介绍： The Chemical Engineering Journal is an international research journal that invites contributions of original and novel fundamental research. It aims to provide an international platform for presenting original fundamental research, interpretative reviews, and discussions on new developments in chemical engineering. The journal welcomes papers that describe novel theory and its practical application, as well as those that demonstrate the transfer of techniques from other disciplines. It also welcomes reports on carefully conducted experimental work that is soundly interpreted. The main focus of the journal is on original and rigorous research results that have broad significance. The Catalysis section within the Chemical Engineering Journal focuses specifically on Experimental and Theoretical studies in the fields of heterogeneous catalysis, molecular catalysis, and biocatalysis. These studies have industrial impact on various sectors such as chemicals, energy, materials, foods, healthcare, and environmental protection.