Results 11 to 20 of about 997,307 (156)

Molecular Magnets [PDF]

open access: yes, 2011
分子磁體是結合化學及物理的研究,也是超分子科學的一環。由於分子磁體材料中有多個磁中心核,在低於居里溫度時,會表現出自發性磁性反應,以三度空間排列的的方式,進行交互作用在。這篇報告中,我們回顧了近年來,在分子磁體這領域的主要結果及一些專家的看法,做簡要的敍述。根據目前分子磁體的發展,按照組構成磁中心核的不同,可區分成有機或無機或有機-無機分子等型態,所以我們在文章中分成四部份,分別是有機化合物、無機錯合物、有機金屬-自由基(金屬-自由基)、單分子磁體,進行討論 ...
林建合; 許家榮; 高憲章; 王文竹
core   +1 more source

SmCo基稀土永磁材料结构、磁性和磁化行为的研究 [PDF]

open access: yes, 2010
随着精密仪器应用范围的扩大,对其环境适应能力提出了更高的要求,其 中永磁体的高温磁性能和温度稳定性成为制约仪器应用的关键因素,因而需要研 制具有高磁性能和高温度稳定性的磁体。纳米晶沉淀硬化2:17型SmCo磁体由于 其高磁性能和高居里温度,是研制低温度系数磁体最理想对象。而1:7型纳米晶 SmCo磁体由于其良好的内禀磁特性,有望成为新一代高温永磁体。本论文通过 成分和工艺上的优化,制备出温度稳定性好同时具有较高磁性能的纳米晶沉淀硬 化2:17型SmCo磁体,系统研究了磁体的微观组织结构、元素分布 ...
刘壮
core  

永磁体磁化矢量方向偏角检测与控制 [PDF]

open access: yes, 2010
随着磁悬浮技术发展越来越成熟,磁悬浮技术的应用得到了极大的推广,其中磁 悬浮轴承在工业中有着极其重要的地位。由于具有无接触、无磨损、无污染等诸多优 势,磁悬浮轴承在航空航天、真空技术、精密机床以及医疗器械等众多行业都有广泛 的应用。 与传统磁性器件对磁体的要求相比,新型精密磁悬浮器件对永磁体性能有更特殊 的要求。由于永磁体的最终磁化矢量方向偏角对精密磁悬浮器件的性能有着极其重要 的影响,因此对于精密磁悬浮器件来说,永磁体的磁化矢量方向偏角是衡量永磁性能 的重要指标。而在磁性材料的大多数应用中 ...
李冶夫
core  

Flexible, Robust Transparent Conductive Films With Excellent Electromagnetic Shielding Properties

open access: yesRare Metals, Volume 45, Issue 8, August 2026.
ABSTRACT Transparent conductive films (TCFs) are indispensable components for next‐generation wearable electronics, intelligent robots, and electromagnetic interference (EMI) shielding devices. However, the fabrication of conventional random metallic mesh suffers from an inherent trade‐off between “randomness and controllability”.
Shanghao Lu   +5 more
wiley   +1 more source

一种人工肝用磁场流化床载微囊反应器 [PDF]

open access: yes, 2014
本发明公开了一种人工肝用磁场流化床载微囊反应器,包含装载有微囊化肝细胞的流化床反应器,微胶囊内包埋有磁介质微粒,在外磁场的作用下,施加于微胶囊与流体曳力方向相反的磁场力,可以显著增加微胶囊的随流体带出的夹带速度,能够在较大流速范围内维持微胶囊在反应器内的悬浮状态,有效解决微胶囊-流化床反应器因为微胶囊比重小、体积小而易被流体带出、操作流速小、反应器设计体积大等问题;能在较高流速及高肝细胞密度条件下实现较好的物质混合与物质交换,从而最大限度地发挥人工肝的治疗作用。另外,通过调节外磁场大小 ...
 李娜   +6 more
core  

High‐Throughput Development of Advanced Metallic Glasses via Compositionally Graded Thin‐Film Combinatorial Strategy

open access: yesRare Metals, Volume 45, Issue 8, August 2026.
ABSTRACT Advanced metallic glasses, leveraging their ultrahigh strength, excellent corrosion resistance, superior soft magnetic properties and good biocompatibility, have gradually become indispensable strategic cornerstones in critical fields such as aerospace, electronic information and energy power. This unique combination of properties enables them
Yizhou Liu   +11 more
wiley   +1 more source

磁性贵金属纳米催化剂 [PDF]

open access: yes, 2011
磁性贵金属纳米颗粒因具有高效的催化性能和可重复利用性而受到广泛关注。本文描述了磁性贵金属纳米颗粒的基本结构,介绍了磁性贵金属催化剂的基本组成部分,概括了磁性贵金属纳米颗粒的制备方法,阐述了国内外磁性贵金属纳米颗粒的创新研究,指出了发展磁性贵金属纳米催化剂亟待解决的问题 ...
黄寅斌   +5 more
core  

Lattice Pre‐Expansion Facilitates Stable Sodium‐Ion Storage in Sn‐Based Anodes by High‐Throughput Fabrication

open access: yesRare Metals, Volume 45, Issue 8, August 2026.
ABSTRACT The low energy density of sodium‐ion batteries (SIBs) remains a major barrier to their large‐scale deployment. Alloy‐based anodes represent a promising class of materials owing to their high specific capacity and low operating potential for sodium storage. However, their practical application is hindered by severe volume expansion upon cycling.
Chen Wang   +10 more
wiley   +1 more source

磁场辅助静电式油烟净化器 [PDF]

open access: yes, 2016
本发明所提供的磁场辅助静电式油烟净化器,包括机壳及容置于该机壳并依次设置的油烟进风口、过滤网、极化装置、集油箱、过滤板、抽气风扇、油烟出风口,其中所述过滤网对应覆盖极化装置,所述过滤板对应覆盖集油箱;该油烟净化器在集油箱内垂直于电场设置有多块磁体板,其中每块磁体板均由多块小磁块交替排列而成,用于形成交替分布的辅助磁场。本发明通过在集油箱内增设的辅助磁场,提高了该集油箱对油烟的吸附能力 ...
李兆婧, 胡晨, 林旻, 闫阿儒
core  

Multimodal Deep Learning‐Assisted Microstructural Evaluation System for Sintered NdFeB Magnets

open access: yesRare Metals, Volume 45, Issue 8, August 2026.
ABSTRACT The performance of sintered NdFeB magnets, especially coercivity, is critically determined by their complex microstructure. However, a quantitative microstructural evaluation system (MES) is much needed but has long been missing in the community.
Zihao Wang   +8 more
wiley   +1 more source

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