Results 21 to 30 of about 8,589 (213)
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Reliable operation of high‐performance magnetostrictive devices, composed of the giant magnetostrictive material (GMM), that is, the TbDyFe alloy, critically depends on an optimally tailored bias magnetic field. Sufficient intensity and uniformity are essential to induce the ideal initial strain in the GMM, enabling peak reciprocating output ...
Jinan Yu +12 more
wiley +1 more source
Fast chemical exchange saturation transfer MRI [PDF]
, 2015 化学交换饱和转移（CEST）为核磁共振（NMR）提供了一种新的对比度增强机制。核Overhauser增强（NOE）效应在高场下的化学交换饱和转移中会在Z谱的高场位置产生一个“负”背景信号，有望成为一种新的磁共振成像（MRI）对比度机制。常规多扫描序列的长时间采样限制了CEST在活体上的应用。快速成像方法如平面回波成像（EPI）可缓解多图像采集的时耗问题，但EPI存在对磁化率不均匀及化学位移效应较敏感等问题。时空编码（SPEN）方法对磁场不均匀性具有较好的免疫力，并保持了EPI的时间分辨率 ...
张苗
core
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Aqueous zinc‐ion batteries (AZIBs) hold great promise for safe and sustainable energy storage, but their commercialization is impeded by severe Zn dendrite growth and interfacial instability. To address these challenges, we propose a defect engineering strategy employing ultrafine ZnAl2O4 (ZAO) nanoparticles (∼5 nm) with oxygen vacancy defects
Yilun Ren +9 more
wiley +1 more source
Dianci bileiqi, 1998 综述了近来国内外提高ZnO压敏电阻片能量耐受能力的方法和途径，其中改善ZnO电阻片的结构均匀性和成分均匀性是提高能量耐受能力的关键，电流密度分布的均匀性有一定影响。因此，为了改善结构均匀性和成分均匀性，必须开展粉料和浆料制备技术的深入细致的研究工作。
李建英, 胡楠, 李盛涛, 刘辅宜
doaj
Electrolyte With Functionalized Boron Nitride Nanosheets for Dendrite‐Free Lithium Metal Anodes
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Lithium metal batteries (LMBs) are regarded as promising candidates for the next‐generation high‐energy‐density storage systems due to their unparalleled theoretical energy density and low redox potential. However, the commercialization of LMBs is tremendously plagued by the barbaric growth of lithium dendrite and the intricate decomposition ...
Ji Zhou +5 more
wiley +1 more source
Dianci bileiqi, 2004 综述了近年来国内外在提高氧化锌电阻片通流能力方面的研究进展。认为影响氧化锌电阻片通流能力的关键因素是电阻片微观结构不均匀性导致电流分布的不均匀性。通过采用湿式化学粉料制备法来提高粉料的均匀性是提高电阻片通流能力的有效途径。而改善粉料的均匀性,从根本上讲是改善添加剂在粉料中的分散均匀性。因此,添加剂在粉料中应尽可能地细化和均匀。
迟屹君 +7 more
doaj
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT The evolution of the γ′−Ni3(Al, Ti) phase in superalloys is governed by a coupled coalescence‐ripening mechanism driven by elemental diffusion. In this study, thermal exposure experiments were performed at 750°C and 800°C for durations ranging from 100 to 20,000 h.
Zhaotian Wang +5 more
wiley +1 more source
Dianci bileiqi, 1981 基于近年来的研究成果,隧道窑的热工况问题得到了极大的改善,但制品烧成的均匀性尚不能得到保证。本文仅就影响烧成均匀性的燃料的某些结构问题和起决定作用的有关事项,予以论述。至于码料形式和焙烧产品的性能的影响,这里不作进一步研究。观察了烧成上的不均匀性 ...
М·З·ШВарцман, 姜惇
doaj
Numerical Simulation and Performance Analysis of a Scramjet Based on Three Dimensional Design [PDF]
, 2015 本文以超燃冲压发动机为研究对象，将其中的各部件置于整个发动机的大环境下进行了设计与性能分析。 以流线追踪三维Busemann型面作为进气道，研究了其不启动时的流场特征以及非设计点下的性能。随后将该进气道与隔离段模型相结合进行了数值模拟，结果表明增加隔离段长度可提升极限反压，但长度越长，反压比提升的幅度越小；进气道来流的影响使隔离段在反压作用下的流场呈现不均匀性，反压越高，不均匀性越强，进气道所受的压阻也越大。 在燃烧室设计过程中，以均匀来流为条件分别考察了边界层厚度、狭缝抽吸 ...
方骁远
core
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT The development of high‐efficiency, stable, and scalable perovskite solar cells/perovskite solar modules (PSCs/PSMs) highly depends on the performance and cost‐effectiveness of functional layers such as electron transport layers (ETLs) and hole transport layers (HTLs).
Baochang Wang +11 more
wiley +1 more source