检索结果-南通市图书馆

高稳定W阻挡层的NbFeSb基半赫斯勒温差发电器件

在线全文

学校读者我要写书评

暂无评论

电源技术 2024年第3期48卷 519-526页

作者：王雷宋庆峰廖锦城柏胜强陈立东中国科学院上海硅酸盐研究所高性能陶瓷和超微结构国家重点实验室上海200050 中国科学院大学材料科学与光电技术学院北京100049

半赫斯勒材料是兼具高性能和高稳定性的中高温热电材料,在深空探测等领域具有重要应用前景。开发了适用于p型Nb_(0.86)Hf_(0.14)FeSb的阻挡层W。通过1073~1173 K的真空等温老化实验,研究了Nb_(0.86)Hf_(0.14)FeSb/W界面的扩散反应行为... 详细信息

半赫斯勒材料是兼具高性能和高稳定性的中高温热电材料,在深空探测等领域具有重要应用前景。开发了适用于p型Nb_(0.86)Hf_(0.14)FeSb的阻挡层W。通过1073~1173 K的真空等温老化实验,研究了Nb_(0.86)Hf_(0.14)FeSb/W界面的扩散反应行为和电输运性能。扫描电镜能谱分析发现界面发生了扩散反应并生成Fe-W反应层,反应层厚度与老化时间呈抛物线关系,表现为扩散控制过程,扩散激活能为211.1 kJ/mol。界面电阻率测试结果显示老化前后界面电阻率均小于1μΩ·cm^(2)。基于有限元仿真计算结果,制备了以W为阻挡层的NbFeSb基温差发电器件。在温差为744 K时,器件的最大转换效率达9.5%,最大输出功率密度达2.27 W/cm^(2)。

关键词：温差发电器件半赫斯勒界面扩散阻挡层 NbFeSb

High-temperature oxidation mechanism of ZrCoSb-based half-Heusler thermoelectric compounds

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2023年第17期148卷 242-249页

作者： Jinyu Gu Lei Wang Qingfeng Song Chao Wang Xugui Xia Jincheng Liao Yi-Yang Sun Lidong Chen shengqiang bai State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

ZrCoSb-based half-Heusler(HH)compounds are among the most promising thermoelectric(TE)materials for high-temperature power *** resistance is one of the key issues for realizing the practical application of TE materials for long-term service in the ambient working *** this work,the oxidation behavior of Zr_(0.5)Hf_(0.5)CoSb_(0.8)Sn_(0.2)(ZHCSS)half-Heusler is systematically studied in the service temperature range from 873 to 1073 *** is revealed that three typical layers of oxidation products tend to form on the surface of HH sample,namely,the dense oxide layer(DOL)composed of(Zr,Hf)O_(2) and CoSb,the alternate oxide layer(AOL)composed of repeated(Zr,Hf)O_(2) and CoSb_(2)O_(6)/Co_(3)O_(4),and the CoSb layer between the DOL and *** mass gain during oxidation is mainly caused by the rapid growth of AOL,which is controlled by the outward diffusion of Zr/Hf and the inward diffusion of *** formation of a continuous CoSb layer and DOL is found beneficial to block the outward diffusion of Zr/*** on the analysis of the dominant factors on the outward and inward diffusions as well as the reaction activation energy,a simple approach is proposed to improve the oxidation resistance of Zr_(0.5)Hf_(0.5)CoSb_(0.8)Sn_(0.2)by pre-oxidizing the sample in low oxygen pressure to form the dense(Zr,Hf)O_(2) and CoSb layers as oxidation protecting and/or diffusion blocking *** oxidation test shows the effectiveness of such pre-oxidation on the formation and growth of the AOL and therefore on improving the service stability of Zr_(0.5)Hf_(0.5)CoSb_(0.8)Sn_(0.2)at high temperatures in the air.

关键词： Thermoelectric Half-Heusler compounds Oxidation mechanism

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

热电发电技术回收工业余热分析

上海第二工业大学学报 2024年第1期41卷 19-29页

作者：王振波吴子华柏胜强俞晓晓谢华清上海第二工业大学能源与材料学院上海201209 中国科学院上海硅酸盐研究所高性能陶瓷和超微结构国家重点实验室上海200050

工业余热资源形式多样且总量巨大,节能潜力可观。利用热电发电技术将工业余热资源转化为电能,既能提升能源利用率又可以降低热污染,是实现双碳目标的重要技术途径。介绍了工业中不同类型余热的分布占比情况和热电发电的基本原理,重点对... 详细信息

工业余热资源形式多样且总量巨大,节能潜力可观。利用热电发电技术将工业余热资源转化为电能,既能提升能源利用率又可以降低热污染,是实现双碳目标的重要技术途径。介绍了工业中不同类型余热的分布占比情况和热电发电的基本原理,重点对热电发电技术在工业领域中的应用研究进展进行了综述,并针对热电发电技术以及该技术在工业应用中存在的一些问题进行了分析、总结和展望。

关键词：工业余热热电发电技术节能

Thermoelectric interface materials:A perspective to the challenge of thermoelectric power generation module

在线全文

学校读者我要写书评

暂无评论

Journal of Materiomics 2019年第3期5卷 321-336页

作者： Weishu Liu shengqiang bai Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen518055China Shenzhen Engineering Research Center for Novel Electronic Information Materials and Devices Southern University of Science and TechnologyShenzhen518055China The State Key Laboratory of High-Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai200050China

The past years has observed a significantly boost of the thermoelectric materials in the scale of thermoelectric figure-of-merit,***,because of its promising application to harvest the widely distributed waste ***,the simplified thermoelectric materials'performance scale also shifted the focus of thermoelectric energy conversion technique from devices-related efforts to materials-level *** a result,the thermoelectric devices-related works didn't get enough *** device-level challenges behind were kept unknown until recent ***,besides the thermoelectric materials properties,the practical energy conversion efficiency and service life of thermoelectric device is highly determined by assembling process and the contact *** this perspective,we are trying to shine some light on the device-level challenge,and give a special focus on the thermoelectric interface materials(TEiM)between the thermoelectric elements and electrode,which is also known as the metallization layer or solder barrier *** will go through the technique concerns that determine the scope of the TEiM,including bonding strength,interfacial resistance and *** general working principles are summarized before the discussion of some typical examples of searching proper TEiM for a given thermoelectric conversion material.

关键词： Thermoelectric power generation Thermoelectric interface materials Bonding strength Interfacial resistance Stability

Module-level design and characterization of thermoelectric power generator

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics B 2022年第4期31卷 39-47页

作者：朱康柏胜强 Hee Seok Kim 刘玮书 Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen 518055China Shenzhen Engineering Research Center for Novel Electronic Information Materials and Devices Southern University of Science and TechnologyShenzhen 518055China The State Key Laboratory of High-Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Mechanical Engineering School of Engineering&TechnologyUniversity of Washington TacomaTacomaWA 98402USA

Thermoelectric power generation provides us the unique capability to explore the deep space and holds promise for harvesting the waste heat and providing a battery-free power supply for *** past years have witnessed massive progress in thermoelectric materials,while the module-level development is still lagged *** would like to shine some light on the module-level design and characterization of thermoelectric power generators(TEGs).In the module-level design,we review material selection,thermal management,and the determination of structural *** also look into the module-level characterization,with particular attention on the heat flux ***,the challenge in the optimal design and reliable characterization of thermoelectric power generators is discussed,together with a calling to establish a standard test procedure.

关键词： thermoelectric module-level design characterization

A novel efficient energy absorber with free inversion of a metal foam-filled circular tube

在线全文

学校读者我要写书评

暂无评论

Applied Mathematics and Mechanics(English Edition) 2024年第1期45卷 1-14页

作者： Jianxun ZHANG Jinwen bai State Key Laboratory for Strength and Vibration of Mechanical Structures School of Aerospace EngineeringXi'an Jiaotong UniversityXi'an 710049China

In this paper, a novel efficient energy absorber with free inversion of a metal foam-filled circular tube(MFFCT) is designed, and the axial compressive behavior of the MFFCT under free inversion is studied analytically and numerically. The theoretical analysis reveals that the energy is mainly dissipated through the radial bending of the metal circular tube, the circumferential expansion of the metal circular tube, and the metal filled-foam compression. The principle of energy conservation is used to derive the theoretical formula for the minimum compressive force of the MFFCT over free inversion under axial loading. Furthermore, the free inversion deformation characteristics of the MFFCT are analyzed numerically. The theoretical steady values are found to be in good agreement with the results of the finite element(FE) analysis. The effects of the average diameter of the metal tube, the wall thickness of the metal tube, and the filled-foam strength on the free inversion deformation of the MFFCT are considered. It is observed that in the steady deformation stage, the load-carrying and energy-absorbing capacities of the MFFCT increase with the increase in the average diameter of the metal tube, the wall thickness of the metal tube, or the filled-foam strength. The specific energy absorption(SEA) of free inversion of the MFFCT is significantly higher than that of the metal tube alone.

关键词： metal foam-filled circular tube(MFFCT) free inversion load-carrying capacity energy absorption

Identity-based searchable attribute signcryption in lattice for a blockchain-based medical system

在线全文

学校读者我要写书评

暂无评论

Frontiers of Information Technology & Electronic Engineering 2024年第3期25卷 461-471页

作者： Huifang YU Xiaoping bai School of Cyberspace Security Xi'an University of Posts&TelecommunicationsXi'an 710121China School of Information Engineering Qinghai Communications Technical CollegeXining 810003China

Electronic healthcare systems can offer convenience but face the risk of data forgery and information *** solve these issues,we propose an identity-based searchable attribute signcryption in lattice for a blockchain-based medical system(BCMS-LIDSASC).BCMS-LIDSASC achieves decentralization and anti-quantum security in the blockchain environment,and provides fine-grained access control and ***,smart contracts are used to replace traditional trusted third parties,and the interplanetary file system(IPFS)is used for ciphertext storage to alleviate storage pressure on the *** to other schemes,BCMS-LIDSASC requires smaller key size and less storage,and has lower computation *** contributes to secure and efficient management of medical data and can protect patient privacy and ensure the integrity of electronic healthcare systems.

关键词： Blockchain Identity-based searchable attribute signcryption Distributed storage NTRU lattice

Use of induced pluripotent stem cell-derived brain cells,organoids,assembloids,and blood-brain barrier models in understanding alcohol and anesthetic-induced brain injuries:an emerging perspective

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2024年第5期19卷 953-954页

作者： Xiaowen bai Department of Cell Biology Neurobiology&AnatomyMedical College of WisconsinMilwaukeeWIUSA

Neurological disorders,including developmental disorders,Alzheimer’s disease(AD),and psychiatric conditions,have significant social and economic impacts *** extensive research into the underlying mechanisms of these disorders,effective treatments remain elusive,partly due to the complexity of the brain,the limited availability of human brain tissue,and the blood-brain barrier(BBB)’s impermeability to certain *** perspective article discusses the potential of human induced pluripotent stem cell(iPSC)-based models of brain cells,organoids,assembloids,and BBB to advance our understanding of the etiology,progression,and mechanisms of brain injuries induced by alcohol consumption and general *** models could also be used to develop protective and therapeutic approaches.

关键词： injuries protective drugs

Superior performance and high service stability for Ge Te-based thermoelectric compounds

在线全文

学校读者我要写书评

暂无评论

National Science Review 2019年第5期6卷 944-954页

作者： Tong Xing Qingfeng Song Pengfei Qiu Qihao Zhang Xugui Xia Jincheng Liao Ruiheng Liu Hui Huang Jiong Yang shengqiang bai Dudi Ren Xun Shi Lidong Chen State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Materials Genome Institute Shanghai University

GeTe-based compounds have been intensively studied recently due to their superior thermoelectric performance, but their real applications are still limited so far due to the drastic volume variation that occurs during the rhombohedral–cubic phase transition, which may break the material or the material/electrode interface during ***, superior performance and high service stability for GeTe-based thermoelectric compounds are achieved by co-doping Mg and Sb into *** linear coefficient of thermal expansion before phase transition is greatly improved to match that after phase transition, yielding smooth volume variation around the phase transition ***, co-doping(Mg, Sb) in GeTe successfully tunes the carrier concentration to the optimal range and effectively suppresses the lattice thermal conductivity.A peak z T of 1.84 at 800 K and an average z T of 1.2 in 300–800 K have been achieved in ***, a Ni/Ti/Ge0.85Mg0.05Sb0.1Te thermoelectric uni-leg is fabricated and tested, showing quite good service stability even after 450 thermal cycles between 473 K and 800 *** study will accelerate the application of GeTe-based compounds for power generation in the mid-temperature range.

关键词： thermoelectrics phase transition thermal expansion service stability power generation application