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Moderate Fields, Maximum Potential: Achieving High Records with Temperature‑Stable Energy Storage in Lead‑Free BNT‑Based Ceramics

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Nano-Micro Letters 2024年第5期16卷 184-200页

作者： Wenjing Shi Leiyang Zhang Ruiyi Jing Yunyao Huang fukang chen Vladimir Shur Xiaoyong Wei Gang Liu Hongliang Du Li Jin Electronic Materials Research Laboratory Key Laboratory of the Ministry of EducationSchool of Electronic Science and EngineeringXi’an Jiaotong UniversityXi’an 710049People’s Republic of China School of Materials and Energy Southwest UniversityChongqing 400715People’s Republic of China School of Natural Sciences and Mathematics Ural Federal UniversityEkaterinburg 620000Russia Multifunctional Electronic Ceramics Laboratory College of EngineeringXi’an International UniversityXi’an 710077People’s Republic of China

The increasing awareness of environmental concerns has prompted a surge in the exploration of leadfree,high-power ceramic *** efforts to develop leadfree dielectric ceramics with exceptional energystorage performance(ESP)have predominantly relied on multicomponent composite strategies,often accomplished under ultrahigh electric ***,this approach poses challenges in insulation and system downsizing due to the necessary working voltage under such *** extensive study,bulk ceramics of(Bi_(0.5)Na_(0.5))TiO_(3)(BNT),a prominent lead-free dielectric ceramic family,have seldom achieved a recoverable energy-storage(ES)density(Wrec)exceeding 7 J cm^(−3).This study introduces a novel approach to attain ceramic capacitors with high ESP under moderate electric fields by regulating permittivity based on a linear dielectric model,enhancing insulation quality,and engineering domain structures through chemical formula *** incorporation of SrTiO_(3)(ST)into the BNT matrix is revealed to reduce the dielectric constant,while the addition of Bi(Mg_(2/3)Nb_(1/3))O_(3)(BMN)aids in maintaining ***,the study elucidates the methodology to achieve high ESP at moderate electric fields ranging from 300 to 500 kV cm^(−1).In our optimized composition,0.5(Bi_(0.5)Na_(0.4)K_(0.1))TiO_(3)–0.5(2/3ST-1/3BMN)(B-0.5SB)ceramics,we achieved a Wrec of 7.19 J cm^(−3) with an efficiency of 93.8%at 460 kV cm^(−1).Impressively,the B-0.5SB ceramics exhibit remarkable thermal stability between 30 and 140℃ under 365 kV cm^(−1),maintaining a Wrec exceeding 5 J cm^(−3).This study not only establishes the B-0.5SB ceramics as promising candidates for ES materials but also demonstrates the feasibility of optimizing ESP by modifying the dielectric constant under specific electric field ***,it provides valuable insights for the future design of ceramic capacitors with high ESP under constraints of limited electric field.

关键词： BNT Energy storage Lead-free Relaxor ferroelectrics Capacitors

An ultrahigh energy storage efficiency and recoverable density in Bi_(0.5)Na_(0.5)TiO_(3)with the modification of Sr_(0.85)La_(0.1)TiO_(3)via viscous polymer process

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Journal of Materiomics 2024年第3期10卷 566-577页

作者： fukang chen Lishun Yang Haoran Feng Qin Li Xinyu Zeng Kun Yu Chunlin Song Yan Yan Li Jin Dou Zhang School of Materials and Energy Southwest UniversityChongqing400715China Electronic Materials Research Laboratory Key Laboratory of the Ministry of EducationSchool of Electronic Science and EngineeringXi'an Jiaotong UniversityXi'an710049China State Key Laboratory of Powder Metallurgy Central South UniversityChangsha410083China

Currently,the development of dielectric ceramic capacitors is restricted by the contradiction between high efficiency and high recoverable ***,a novel strategy was designed to achieve a su-perior balance between ***,introducing Sr_(0.85)La_(0.1)TiO_(3)can enhance the content of the weak polar phase(P4bm)to become the main component,which can optimize the relaxor behaviour and improve ***,the electric breakdown strength was effectively enhanced by grain refinement and viscous polymer ***,a high recoverable energy density of~5.3 J/cm^(3)and an excellent efficiency of~92.2%were attained in 0.9Bi_(0.5)Na_(0.5)TiO_(3)-0.1Na_(0.8)Sr_(0.1)NbO_(3)ceramic with the addition of 0.35Sr_(0.85)La_(0.1)TiO_(3)after viscous polymer *** piezoelectric force microscope had been applied to prove the high activity of the polar nanoregions and finite element analysis was adopted to explain the reasons for the enhancing electric breakdown *** addition,this ceramic exhibits good tem-perature and frequency stability,and a fast discharging rate of 0.11 ms,making it a potential candidate for the actual application.

关键词： Lead-free ceramics Energy storage BNT Landau-free energy

Achieving high dielectric energy-storage properties through a phase coexistence design and viscous polymer process in BNT-based ceramics

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Journal of Materiomics 2023年第6期9卷 1004-1014页

作者： Yule Yang Juanjuan Wang Ruiyi Jing Wenjing Shi Leiyang Zhang Chao Li Xinyu Zeng fukang chen Gang Liu Xiaolian Chao Yan Yan Li Jin School of Materials Science and Engineering Xi'an University of TechnologyXi'an710048China Electronic Materials Research Laboratory Key Laboratory of the Ministry of EducationSchool of Electronic Science and EngineeringXi'an Jiaotong UniversityXi'an710049China Instrument Analysis Center Xi'an Jiaotong UniversityXi'an710049China School of Materials and Energy Southwest UniversityChongqing400715China Key Laboratory for Macromolecular Science of Shaanxi Province Shaanxi Key Laboratory for Advanced Energy DevicesSchool of Materials Science and EngineeringShaanxi Normal UniversityXi'an710062China

In the last few decades,dielectric capacitors have gotten a lot of attention because they can store more power and charge and discharge very *** it has a low energy-storage density(Wrec),efficiency(h),and temperature *** adding Pb(Mg1/3Nb2/3)O3(PMN)and(Bi0$1Sr0.85)TiO3(BST)to a nonstoichiometric(Bi0$51Na0.5)TiO3(BNT)matrix,the goal is to change the phase transition properties and make the material more relaxor ferroelectric(RFE)by lowering the remnant polarization Pr and keeping the maximum polarization Pmax.A viscous polymer process(VPP)is used to improve the electric breakdown strength,which is also a key part of being able to store *** working together,ceramics with the formula 0.79[0.85BNT-0.15PMN]-0.21BST(BP-0.21BST)are *** phase structure has been changed from a rhombohedral phase to a rhombohedral-tetragonal coexisted *** is beneficial for RFE properties and gives a Wrec of 6.45 J/cm^(3) and a h of 90%at 400 kV/***,the energy-storage property is very temperature stable between 30 and 150*** results show that process optimization and composition design can be used to improve the energy storage properties,and that the dielectric ceramic materials made can be used in high-powder pulse dielectric capacitors.

关键词： BNT Energy-storage Charge-discharge Viscous polymer process Relaxor ferroelectric

THE J STRUCTURE IN ECONOMIC EVOLVING PROCESS

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Journal of Systems Science & Complexity 2003年第3期16卷 327-338页

作者： FANG fukang chen Qinghua(Institute of Nonequilibrium Systems, Beijing Normal University, Beijing 100875, China) Institute of Nonequilibrium Systems Beijing Normal University 北京 100875

The economic evolution exhibits complexity. Behind the variable and fluctuant economic data there exists basic characters and rules. One basic structure in economic evolving process called as 'J' structure is studied by us. This kind of structure exists in a wide area, such as economic growth, technology innovation, international trade, education,human capital, ecology and environment etc. From the view of economic evolution, J structure has the character that system should suffer the pressure of initial investment with profit decreasing but get larger return afterwards. It is a kind of adaptation in complexe conomic systems; it reflects the adaptive and reformative ability of the system under the surrounding change. We illustrate the J structure by discussing economic growth. Based on a two-dimension dynamic system the geometric character and mechanism of J structure are studied, also the phase graphs with its condition are given. Also some further works are discussed.

关键词： J structure complexity dynamic system economic evolution

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李健吾与他的“老大哥”郑振铎

戏剧艺术 2023年第5期 1-12页

作者：陈福康福州外语外贸学院郑振铎研究所

李健吾一生取得多方面成就,与“老大哥”郑振铎的影响和帮助分不开。李健吾人生中最重要的几个关头都得到郑振铎这位“带头人”的帮助。李健吾在读中小学时就已受郑振铎文艺理论的启蒙。郑振铎推荐李健吾为《文学季刊》的编委,这是后者... 详细信息

李健吾一生取得多方面成就,与“老大哥”郑振铎的影响和帮助分不开。李健吾人生中最重要的几个关头都得到郑振铎这位“带头人”的帮助。李健吾在读中小学时就已受郑振铎文艺理论的启蒙。郑振铎推荐李健吾为《文学季刊》的编委,这是后者成为著名编辑之始。李健吾在郑振铎主编的该刊发表论文,这是李健吾成为著名学者之始。郑振铎请李健吾去暨南大学破格当教授,这成为后者人生的重大转折。全面抗战后,李健吾追随郑振铎秘密参加“复社”,积极参加救亡戏剧运动。抗战结束后,李健吾接受郑振铎的意见,继续从事进步文化事业,这是他人生的又一重大转折。李健吾协助郑振铎主编《文艺复兴》,这段时间成为其一生的高光时刻。在反对国民党发动内战、争取民主自由的斗争中,李健吾也是跟着郑振铎的。解放后,郑振铎对不重视李健吾的现象提出意见,又把后者调入文学研究所工作,这是李健吾人生的再次重要转折。

关键词：李健吾郑振铎带头人

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郑振铎与百年中国戏剧

戏剧艺术 2022年第2期 79-92,93,130页

作者：陈福康福州外语外贸学院郑振铎研究所

郑振铎为百年中国戏剧事业做出了重大的甚至他人无可替代的贡献,但有些方面却几乎被当代研究者忽视甚至遗忘。郑振铎是五四时期新戏剧运动的先驱者,他的戏剧活动从一开始就目的明确,全方位进行,显示出开创性和指导性的显著特点。他把戏... 详细信息

郑振铎为百年中国戏剧事业做出了重大的甚至他人无可替代的贡献,但有些方面却几乎被当代研究者忽视甚至遗忘。郑振铎是五四时期新戏剧运动的先驱者,他的戏剧活动从一开始就目的明确,全方位进行,显示出开创性和指导性的显著特点。他把戏剧运动称为“光明运动”,是他一辈子坚持的初心和使命。“五四”后他仍然积极参与了大量的、多方面的戏剧活动,而且一以贯之地与其爱国的、进步的社会活动紧密结合。他与20世纪中国一大批最著名的戏剧家及戏剧研究者、外国戏剧翻译者都是好友,或给过他们巨大帮助。他一生对中国古典戏剧作了深入研究和精心保护。1949年以后他积极参与领导了戏曲改革,发表过重要意见,倾注了很大的心血。

关键词：郑振铎中国戏剧百年

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郑振铎《欧行日记》佚稿

文献 2005年第3期 39-53页

作者：陈福康上海外国语大学

郑振铎先生生前曾发表过两种他亲自整理、润色的日记.一是,1934年10月由上海良友图书印刷公司出版;二是,1945年11月21日至12月30日在上海上发表.非常非常遗憾的是,这两种日记本来所记的日子很多,但都因故只发表了开头很少的一部分,而后... 详细信息

郑振铎先生生前曾发表过两种他亲自整理、润色的日记.一是,1934年10月由上海良友图书印刷公司出版;二是,1945年11月21日至12月30日在上海上发表.非常非常遗憾的是,这两种日记本来所记的日子很多,但都因故只发表了开头很少的一部分,而后面大部分日记原稿却都已基本散佚了.然而,又大不幸之小幸:后来都发现还保存下来未刊原稿中的极少的一部分,也许可以给我们些许安慰.关于的残存部分,我已整理出来,发表于2005年第1期;今再将未刊原稿的残存部分也整理发表出来.

关键词：欧行日记郑振铎十二时郑先生

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论鲁迅日文书信等必须重新翻译

学术研究 2019年第3期 140-146页

作者：陈福康福州外语外贸学院

2005年版《鲁迅全集》对鲁迅致日本人士的书信和答增田涉问的中译文,已经纠正了1981年版和前人翻译的大量错误。由此证明,修订重译工作是非常有必要的。由此也证明,鲁迅日文书信的翻译及重译绝不是一件容易的工作。但2005年版《鲁迅全... 详细信息

2005年版《鲁迅全集》对鲁迅致日本人士的书信和答增田涉问的中译文,已经纠正了1981年版和前人翻译的大量错误。由此证明,修订重译工作是非常有必要的。由此也证明,鲁迅日文书信的翻译及重译绝不是一件容易的工作。但2005年版《鲁迅全集》在日文书信校译方面和所谓"答增田涉问信件集录"中,还有很多地方没有采纳研究者的校译和修订,而且还有一些地方仍然有错译,实有重新认真翻译的必要。必须向鲁迅负责,向广大读者负责,发现了错误就一定要改正。

关键词：鲁迅日文书信翻译

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郑振铎与文学遗产的整理研究工作

文学遗产 2021年第3期 14-22页

作者：陈福康福州外语外贸学院

科学地继承、整理、研究中国文学遗产的工作,以1920年《文学研究会会章》开宗明义首次提出"整理中国旧文学"为开端,进行至今已逾百年。五四运动在思想上和学术骨干上为此后百年中国文学遗产整理研究事业准备了基本条件。在这方面,郑振... 详细信息

科学地继承、整理、研究中国文学遗产的工作,以1920年《文学研究会会章》开宗明义首次提出"整理中国旧文学"为开端,进行至今已逾百年。五四运动在思想上和学术骨干上为此后百年中国文学遗产整理研究事业准备了基本条件。在这方面,郑振铎正是一个非常典型的代表,是今人回顾百年文学遗产整理与研究工作时绝对绕不过的领军人物。郑振铎从五四运动时起就受到马克思主义的影响,并与早期中国共产党人有密切的联系,这些为人淡忘或不为人知的事实很值得发掘和重提。郑振铎异常杰出的学术贡献、卓越的引领作用和炽热的爱国情怀是非常令人敬佩的。我们更不能忘了郑振铎参与领导新中国最初九年文学遗产整理与研究工作的功绩。

关键词：郑振铎文学遗产百年