应用10mm薄板铸锭制备的NdFeB烧结磁体

NdFeB薄板铸锭具有晶粒细，富钕相分布均匀及在稀土含量较低时可以防止α－Fe相出现的特点，是一种适合制备高性能烧磁体的合金铸锭，本文介绍了一种用10mm薄板铸锭和球磨制粉方法制备烧结磁体的工艺，在设备要求较低的情况下制备得到了Br=1.37T,(BH)max=320kJ/m^3(40MGOe)的烧结磁体，同时比较了使用常规铸锭和常规工艺的结果，强调了氢爆法在该工艺中的重要作用，最后对该工艺的改进方向和10mm铸锭的应用前景进行了阐述。     

光隔离器及其相关的磁光材料

本文简要介绍了磁光隔离器的理论、结构和分类 ,并提出了该器件今后发展的几个问题 ,最后介绍了几种磁光材料     

Criterion of Magnetic Saturation and Simulation of Nonlinear Magnetization for a Linear Multi-core Pulse Transformer

The linear multi-core pulse transformer is an important primary driving source used in pulsed power apparatus for the production of dense plasma owing to its compact,relatively low-cost and easy-to-handle characteristics.The evaluation of the magnetic saturation of the transformer cores is essential to the transformer design,because the energy transfer efficiency of the transformer will degrade significantly after magnetic saturation.This work propses analytical formulas of the criterion of magnetic saturation for the cores when the transformer driver practical loads.Furthermore,an electric circuit model based on a dependent source treatment for simulating the electric behavior of the cores related to their nonlinear magnetization is developed using the initial magnetization curve of the cores.The numerical simulation with the model is used to evaluate the validity of the criterion.Both the criterion and the model are found to be in agreement with the experimental data.     

对热量表流量传感器若干技术问题之初探

本文根据笔者对热量表流量传感器的研究体会,详尽分析了小口径机械式热水表作为热量表流量传感器时存在的主要问题,如量程问题,冷热水流量系数差异问题,降低始动流量和提高小流量情况下精度问题,磁传方式存在的磁干扰问题,失步问题,以及对我国供暖系统水质的适应性问题.文章根据研究和分析结果对上述问题提出一些初步解决方案与业内同行研讨,以期提高我国热量表的研制水平.     

影响巨磁电阻钙钛矿锰氧化合物居里温度的结构分析

测定了La1-xAx(MnB）O3型巨磁电阻钙钛矿化合物在不同组成时的居里温度，利用A位离子对晶格能的贡献和B位离子极化力的变化分别对A和B位离子掺杂及A，B位离子组成同时变化时钙钛矿的居里温度进行了分析，结果与实验一致。     

非晶软磁合金的巨磁阻抗效应及应用

近来在ＦｅＣｏＳｉＢ等Ｃｏ基非晶体丝带中现了巨磁阻抗效应，由于在一小的直流纵向偏置场下该效应能使丝带两端的交流电压发生大而灵敏的变化，因而在磁记录头和传顺技术中具有巨大的应用科学潜能，受到各国学者的关注，本文简单介绍了巨磁阻抗效应的来源，并综述了近年来非晶体软磁合金材料的的巨磁阻抗效应及应用的研究进展，文章最后说明了尚待深入解决的问题。     

电容位移法精确测量磁性薄膜的磁致伸缩系数

介绍了一种精确测量磁性薄膜磁致伸缩系数方法－电容位移法，并自行研制组装了一套测量装置，通过误差分析，仪器的精确标定，对稀土－铁超磁致伸缩薄膜的磁致伸缩系数进行了测量，获得满意的结果。     

Effects of Heat Treatment Temperature and Time on Structure and Static Magnetic Property of W-type Ferrite Hollow Mierospheres

Hollow spheres of hexagonal ferrite BaCozFelrO27 were fabricated through a spray pyrolysis technique using co-precipitation ferrite powder precursor as materials, followed by calcinations in an air atmosphere. The phase composition, micro-morphology, and static magnetic property of the particles were measured by XRD, SEM, and VSM. The results indicate that the method for preparation of ferrite hollow microspheres （FHM） results in a broad particles size distribution. The density of FHM decreased from 5.31 g/ cm^3 to 2.31 g/cm^3. When the heating rate was 5℃/min, and temperature was 1 200℃ for 4 hours, pure W-type ferrites were formed. With the heat treatment temperature and time increasing, the crystal structure becomes perfect, the saturation magnetization is increased and the coercive force is decreased.     

磁滑轮预选技术的应用

以生产实践为基础，阐述了预选的意义、铁矿石预选的分类以及在邯邢地区的使用情况，并就铁矿石预选技术在设计与生产管理中应注意的几个问题进行了探讨。