{"title":"非等效离子掺杂增强高熵（1-x）(Na0.5Li0.5NbO3)-x(Sr0.5Bi0.5)(Fe0.5Ti0.25Zr0.25)O3介电陶瓷的储能性能","authors":"Y.Q. Guo , Aditya Jain , H.Z. Zhou , Y.G. Wang","doi":"10.1016/j.ceramint.2024.12.353","DOIUrl":null,"url":null,"abstract":"<div><div>High entropy dielectric ceramics with excellent relaxation characteristics are ideal materials for pulse capacitors. In this study, a high entropy dielectric ceramic based on NaNbO<sub>3</sub> was engineered to enhance relaxation properties through non-equivalent ion substitution and increased entropy. The composition studied was (1-<em>x</em>)(Na<sub>0.5</sub>Li<sub>0.5</sub>NbO<sub>3</sub>) - <em>x</em>(Sr<sub>0.5</sub>Bi<sub>0.5</sub>)(Fe<sub>0.5</sub>Ti<sub>0.25</sub>Zr<sub>0.25</sub>)O<sub>3</sub> (NLN-SBFTZ) with <em>x</em> = 0, 0.15, 0.20, and 0.25. The introduction of non-equivalent ions (Sr<sub>0.5</sub>Bi<sub>0.5</sub>)<sup>5/2+</sup> and (Fe<sub>0.5</sub>Ti<sub>0.25</sub>Zr<sub>0.25</sub>)<sup>7/2+</sup>, significantly increases the configurational entropy (Δ<em>S</em><sub>config</sub>). With a breakdown field strength of 500 kV/cm, the modified ceramics sample (<em>x</em> = 0.20) shows a recoverable energy density (<em>W</em><sub><em>rec</em></sub>) of 4.70 J/cm<sup>3</sup> and an energy efficiency (<em>η</em>) of 83.5 %, surpassing the performance of undoped samples (<em>W</em><sub><em>rec</em></sub> = 0.15 J/cm<sup>3</sup>, <em>η</em> = 43.2 %). These results confirm that the high entropy design strategy via non-equivalent ion doping effectively enhances the energy storage capabilities of lead-free dielectric materials.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 7","pages":"Pages 9199-9208"},"PeriodicalIF":5.6000,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Enhanced energy storage performance of high entropy (1-x)(Na0.5Li0.5NbO3)-x(Sr0.5Bi0.5)(Fe0.5Ti0.25Zr0.25)O3 dielectric ceramics through non-equivalent ion doping\",\"authors\":\"Y.Q. Guo , Aditya Jain , H.Z. Zhou , Y.G. Wang\",\"doi\":\"10.1016/j.ceramint.2024.12.353\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>High entropy dielectric ceramics with excellent relaxation characteristics are ideal materials for pulse capacitors. In this study, a high entropy dielectric ceramic based on NaNbO<sub>3</sub> was engineered to enhance relaxation properties through non-equivalent ion substitution and increased entropy. The composition studied was (1-<em>x</em>)(Na<sub>0.5</sub>Li<sub>0.5</sub>NbO<sub>3</sub>) - <em>x</em>(Sr<sub>0.5</sub>Bi<sub>0.5</sub>)(Fe<sub>0.5</sub>Ti<sub>0.25</sub>Zr<sub>0.25</sub>)O<sub>3</sub> (NLN-SBFTZ) with <em>x</em> = 0, 0.15, 0.20, and 0.25. The introduction of non-equivalent ions (Sr<sub>0.5</sub>Bi<sub>0.5</sub>)<sup>5/2+</sup> and (Fe<sub>0.5</sub>Ti<sub>0.25</sub>Zr<sub>0.25</sub>)<sup>7/2+</sup>, significantly increases the configurational entropy (Δ<em>S</em><sub>config</sub>). With a breakdown field strength of 500 kV/cm, the modified ceramics sample (<em>x</em> = 0.20) shows a recoverable energy density (<em>W</em><sub><em>rec</em></sub>) of 4.70 J/cm<sup>3</sup> and an energy efficiency (<em>η</em>) of 83.5 %, surpassing the performance of undoped samples (<em>W</em><sub><em>rec</em></sub> = 0.15 J/cm<sup>3</sup>, <em>η</em> = 43.2 %). These results confirm that the high entropy design strategy via non-equivalent ion doping effectively enhances the energy storage capabilities of lead-free dielectric materials.</div></div>\",\"PeriodicalId\":267,\"journal\":{\"name\":\"Ceramics International\",\"volume\":\"51 7\",\"pages\":\"Pages 9199-9208\"},\"PeriodicalIF\":5.6000,\"publicationDate\":\"2025-03-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Ceramics International\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0272884224060243\",\"RegionNum\":2,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"2024/12/24 0:00:00\",\"PubModel\":\"Epub\",\"JCR\":\"Q1\",\"JCRName\":\"MATERIALS SCIENCE, CERAMICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Ceramics International","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0272884224060243","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2024/12/24 0:00:00","PubModel":"Epub","JCR":"Q1","JCRName":"MATERIALS SCIENCE, CERAMICS","Score":null,"Total":0}
引用次数: 0
摘要
高熵介质陶瓷具有优异的弛豫特性，是脉冲电容器的理想材料。在这项研究中，设计了一种基于NaNbO3的高熵介电陶瓷，通过非等效离子取代和增加熵来增强弛豫性能。所研究的组成为（1-x）(Na0.5Li0.5NbO3) -x (Sr0.5Bi0.5)(Fe0.5Ti0.25Zr0.25)O3 (nln - sbft), x = 0、0.15、0.20和0.25。非等效离子（Sr0.5Bi0.5）5/2+和（Fe0.5Ti0.25Zr0.25）7/2+的引入显著增加了构型熵（ΔSconfig）。当击穿场强为500 kV/cm时，改性陶瓷样品（x = 0.20）的可回收能量密度（Wrec）为4.70 J/cm3，能量效率（η）为83.5%，优于未掺杂样品（Wrec = 0.15 J/cm3, η = 43.2%）。这些结果证实了通过非等效离子掺杂的高熵设计策略有效地提高了无铅介电材料的储能能力。
Enhanced energy storage performance of high entropy (1-x)(Na0.5Li0.5NbO3)-x(Sr0.5Bi0.5)(Fe0.5Ti0.25Zr0.25)O3 dielectric ceramics through non-equivalent ion doping
High entropy dielectric ceramics with excellent relaxation characteristics are ideal materials for pulse capacitors. In this study, a high entropy dielectric ceramic based on NaNbO3 was engineered to enhance relaxation properties through non-equivalent ion substitution and increased entropy. The composition studied was (1-x)(Na0.5Li0.5NbO3) - x(Sr0.5Bi0.5)(Fe0.5Ti0.25Zr0.25)O3 (NLN-SBFTZ) with x = 0, 0.15, 0.20, and 0.25. The introduction of non-equivalent ions (Sr0.5Bi0.5)5/2+ and (Fe0.5Ti0.25Zr0.25)7/2+, significantly increases the configurational entropy (ΔSconfig). With a breakdown field strength of 500 kV/cm, the modified ceramics sample (x = 0.20) shows a recoverable energy density (Wrec) of 4.70 J/cm3 and an energy efficiency (η) of 83.5 %, surpassing the performance of undoped samples (Wrec = 0.15 J/cm3, η = 43.2 %). These results confirm that the high entropy design strategy via non-equivalent ion doping effectively enhances the energy storage capabilities of lead-free dielectric materials.
期刊介绍：
Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties.
Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour.
Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.
京公网安备 11010802042870号
京ICP备2023020795号-1
分享
求助内容：
应助结果提醒方式：
扫码关注我们
