MCY—1型软磁材料测量仪

目前,国内对软磁材料及器件参数的静态测量,普遍采用冲击法、磁通计法及自动测量法等。动态参数的测量则采用伏安法、交流电位计法及交流磁化自动测量仪。但是,这些测量方法均无法直接得到动态曲线的参数。必须利用所得到的曲线及数据再进行繁杂的计算方能得到。即使这样,得到的曲线及参数由于采用了积分仪等电路而产生的线路误差,也常常使测量的重复性较差,精度也难以保证。 我们设计制造了MCY—1测量系统,较好的解决了直接测量动态参数问题,经磁材厂研制车间使用一年,性能稳定可靠,测试速度快,精度高,得到好评。 1.测试原理: 交流磁化曲…     

铁合金基玻璃粉末冶金耐磨软磁材料

可以用粉末冶金方法制取铁(合金)基玻璃复合材料,这是一种(?)摩耐磨软磁材料。本文阐述了铁-玻璃、铁镍-玻璃复合材料的性能及显微组织。     

软磁材料的发展现状

评介了金属软磁材料、铁氧体软磁材料、非晶软磁材料和超微晶软磁材料四大系列。     

铁钴镍基非晶态软磁材料的研究

研究了１０钟以铁钴镍为基的非昌态软磁材料，对非晶态合金的成分，熔点，晶化温度，居里温度及一些磁性能作了分析比较、将将材料制成元件装到电子镇流器上试验，研究结果表明，铁磁元素铁钴镍的含量比例，是影响非晶态磁性的主要因素；类金属元素对软磁材料的磁性能也有一定的影响，含磷的非晶态合金的熔点，晶化温度及居里温度比含碳的较高。     

纳米晶软磁材料的磁性能

介绍了纳米晶软磁材料所具有的独特结构和优异的磁性能。从纳米晶软磁材料的微观组织结构和宏观磁特性紧密相关的角度,探讨了铁基纳米晶合金的结构与磁性之间的依赖关系。     

软磁材料锰锌铁氧体共沉粉料的研制

本文研究了碳酸盐－氢氧化物法共同沉淀Ｆｅ＾２＋、Ｍｎ＾２＋、Ｚｎ＾２＋时，反应最终ｐＨ值、沉淀温度、加料方式、加料速度及搅拌强度等因素对恒定共沉粉Ｆｅ２Ｏ３、ＭｎＯ及ＺｎＯｍｏｌ％组成、粒度和颗粒形状的影响，并进一步考查了共沉粉组成与软磁材料性能的关系。在研究基础上确定生产高频低功耗锰锌铁氧体材料Ｈ７２４（ＰＣ４０）和高磁导率锰锌铁氧体材料Ｈ５Ｃ２（μｉ＝１００００±３０％）共沉粉合成的最宜条件。     

机械合金化制备FeMB纳米晶软磁材料的研究

介绍了一类重要的高性能软磁材料FeMB纳米晶合金的研究情况,重点论述了机械合金化法制备原理、过程参数和后续处理工艺对合金软磁性能和热稳定性的影响,以及材料的应用前景.     

纳米晶复合交换耦合软磁和硬磁材料的研究进展

论述了纳米晶复合交换耦合软磁和硬磁材料的概念，结构，性能和特点，着重讨论了二者之间的异同点，并从细化晶粒的角度阐述了二者之间的可相互借鉴性。     

纳米高频软磁薄膜材料研究进展

由于高频软磁薄膜材料具有巨大的应用前景因此获得了人们广泛的关注。对纳米合金软磁薄膜、纳米软磁颗粒膜、多层膜以及图形化薄膜进行了分类综述,分别介绍了各类薄膜的制备方法、化学成分、微观结构特点和高频物理性能,并对影响其性能的主要因素进行了讨论。由于纳米高频软磁薄膜材料相对于传统磁性材料具有显著优势,所以纳米合金软磁薄膜有望取代铁氧体作为制作高频磁性器件的主要应用材料。由于纳米软磁颗粒膜、多层膜以及新兴的图形化薄膜具有材料结构设计和物性剪裁的自由度,因此将是今后的重点研究方向。     

纳米晶软磁材料的发展、磁特性及展望

本文首先回顾了纳米晶软磁材料的发展过程。对其合金化、磁性能特别是制备工艺作了较详细的介绍，分析了优异软磁性能的起因，最后对纳米晶软磁材料的发展趋势作了展望。     

Maximizing Specific Loss Power for Magnetic Hyperthermia by Hard–Soft Mixed Ferrites

Maximized specific loss power and intrinsic loss power approaching theoretical limits for alternating‐current (AC) magnetic‐field heating of nanoparticles are reported. This is achieved by engineering the effective magnetic anisotropy barrier of nanoparticles via alloying of hard and soft ferrites. 22 nm Co_0.03Mn_0.28Fe_2.7O₄/SiO₂ nanoparticles reach a specific loss power value of 3417 W g^?1_metal at a field of 33 kA m^?1 and 380 kHz. Biocompatible Zn_0.3Fe_2.7O₄/SiO₂ nanoparticles achieve specific loss power of 500 W g^?1_metal and intrinsic loss power of 26.8 nHm² kg^?1 at field parameters of 7 kA m^?1 and 380 kHz, below the clinical safety limit. Magnetic bone cement achieves heating adequate for bone tumor hyperthermia, incorporating an ultralow dosage of just 1 wt% of nanoparticles. In cellular hyperthermia experiments, these nanoparticles demonstrate high cell death rate at low field parameters. Zn_0.3Fe_2.7O₄/SiO₂ nanoparticles show cell viabilities above 97% at concentrations up to 500 µg mL^?1 within 48 h, suggesting toxicity lower than that of magnetite.     

Soft Ultrathin Electronics Innervated Adaptive Fully Soft Robots

Soft robots outperform the conventional hard robots on significantly enhanced safety, adaptability, and complex motions. The development of fully soft robots, especially fully from smart soft materials to mimic soft animals, is still nascent. In addition, to date, existing soft robots cannot adapt themselves to the surrounding environment, i.e., sensing and adaptive motion or response, like animals. Here, compliant ultrathin sensing and actuating electronics innervated fully soft robots that can sense the environment and perform soft bodied crawling adaptively, mimicking an inchworm, are reported. The soft robots are constructed with actuators of open‐mesh shaped ultrathin deformable heaters, sensors of single‐crystal Si optoelectronic photodetectors, and thermally responsive artificial muscle of carbon‐black‐doped liquid‐crystal elastomer (LCE‐CB) nanocomposite. The results demonstrate that adaptive crawling locomotion can be realized through the conjugation of sensing and actuation, where the sensors sense the environment and actuators respond correspondingly to control the locomotion autonomously through regulating the deformation of LCE‐CB bimorphs and the locomotion of the robots. The strategy of innervating soft sensing and actuating electronics with artificial muscles paves the way for the development of smart autonomous soft robots.     

电力电子技术产业化发展策略分析

从实证的角度出发，研究和分析了我国电力电子技术产业化发展中存在的问题，指出当前在我国电力电子产业发展中存在着技术水平相对落后、规模经济性差、产业整体经济效益不佳、人才资金缺乏等现象，并针对这些问题提出了相应的策略。     

Stretchable and Soft Electronics using Liquid Metals

The use of liquid metals based on gallium for soft and stretchable electronics is discussed. This emerging class of electronics is motivated, in part, by the new opportunities that arise from devices that have mechanical properties similar to those encountered in the human experience, such as skin, tissue, textiles, and clothing. These types of electronics (e.g., wearable or implantable electronics, sensors for soft robotics, e‐skin) must operate during deformation. Liquid metals are compelling materials for these applications because, in principle, they are infinitely deformable while retaining metallic conductivity. Liquid metals have been used for stretchable wires and interconnects, reconfigurable antennas, soft sensors, self‐healing circuits, and conformal electrodes. In contrast to Hg, liquid metals based on gallium have low toxicity and essentially no vapor pressure and are therefore considered safe to handle. Whereas most liquids bead up to minimize surface energy, the presence of a surface oxide on these metals makes it possible to pattern them into useful shapes using a variety of techniques, including fluidic injection and 3D printing. In addition to forming excellent conductors, these metals can be used actively to form memory devices, sensors, and diodes that are completely built from soft materials. The properties of these materials, their applications within soft and stretchable electronics, and future opportunities and challenges are considered.