共查询到20条相似文献,搜索用时 593 毫秒
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山口俊一郎 《中国洗涤用品工业》2014,(9):50-53
本文介绍的Chemical clean PR是专用于硬盘基板制造工程的工业洗净剂系列产品,它在硬盘驱动器(HDD)制造过程中发挥着重要的作用。 相似文献
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介绍了影像领域 HDD、 CD、 DVD及 DVC等可换型封装存储介质的现状及发展方向,指出垂直磁记录方式又成为研究的热门课题。高密度化是存储介质的共同课题,其发展目标是 100 Gb/in2,还指出了影像信息存储领域存在的问题。 相似文献
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磁旋转编码器的发展及其应用 总被引:1,自引:0,他引:1
论述了磁旋转编码器的结构、工作原理、磁鼓记录媒体和磁阻传感器的特性 ,介绍了磁旋转编码器的应用领域和使用功能 ,并对其发展前景进行了展望。指出随着磁旋转编码器的小型化、集成化发展和可靠性的提高 ,它已经成为发展高技术产业的关键 相似文献
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磁场对磁性吸附剂吸附锌、汞的影响 总被引:8,自引:0,他引:8
本文探讨了磁场对磁性吸附剂吸附Zn^2+和Hg^2+,对及共存体系的吸附性能,结果表明:磁化吸附剂的吸附量比不磁化大,并随磁场强度增大而增加,磁化吸附剂的吸附平衡关系可用Frendlich经验公式描述。 相似文献
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本年综述的内容包含:(1)垂直磁记录;(2)磁记录材料;(3)高密度磁记录介质;(4)巨磁电阻材料;(5)磁记录头。 相似文献
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Sara Bogren Andrea Fornara Frank Ludwig Maria del Puerto Morales Uwe Steinhoff Mikkel Fougt Hansen Olga Kazakova Christer Johansson 《International journal of molecular sciences》2015,16(9):20308-20325
This study presents classification of different magnetic single- and multi-core particle systems using their measured dynamic magnetic properties together with their nanocrystal and particle sizes. The dynamic magnetic properties are measured with AC (dynamical) susceptometry and magnetorelaxometry and the size parameters are determined from electron microscopy and dynamic light scattering. Using these methods, we also show that the nanocrystal size and particle morphology determines the dynamic magnetic properties for both single- and multi-core particles. The presented results are obtained from the four year EU NMP FP7 project, NanoMag, which is focused on standardization of analysis methods for magnetic nanoparticles. 相似文献
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缺乏针对不同磁化率粒子的分离技术成为制约磁性药物制剂研究发展的重要因素。讨论了利用螺旋毛细管作为分离通道的简单场流分离装置,对不同磁化率的磁性粒子进行分离的可行性,并对影响分离的条件进行了考察。结果表明,在旋转频率为2.21 Hz,流速为0.16 mL/min,磁场距离为0.48 mm的条件下,旋转磁场流分离体系可以很好的分离不同磁化率的磁性粒子。旋转磁场的引入和水动抬升力的作用克服了固定磁场作用范围有限和粒子团聚等缺点,使此方法具有较高的分离度。 相似文献
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《分离科学与技术》2012,47(3):355-363
A portable magnetic separator was proposed for in-vivo biomedical applications. In this prototype design, a matrix of alternating, parallel magnetizable wires, and biocompatible tubing is immersed into an externally applied magnetic field. The wires are magnetized and high magnetic fields as well as field gradients are created to trap blood-borne flowing magnetic nanospheres in the tube. In this paper, a parametric investigation was carried out to evaluate the capture efficiency of flowing magnetic nanospheres by a separator unit consisting of single tubing and four wires. The parameters include: mean blood velocity (1 to 20 cm/s); magnetic field strength (0.1 to 2.0 T); sphere size (500 nm to 1000 nm in radii); sphere magnetic material (iron, two types of magnetite) and magnetite content in the spheres (0.05 to 0.8 by weight); wire material (nickel, stainless steel 430, and Wairauite); wire length (2.0 to 20 cm); wire size (0.125 to 1.0 mm in radii); tubing size at a fixed ratio of tubing to wire diameter of unity. The results show that capture efficiencies of the spheres of well over 90% were achievable under reasonable human physiological conditions, provided that the mean blood velocities were below about 5.0 cm/s. The results also show that the magnetic separator performance could be improved by maximizing the applied magnetic field strength up to about 1.0 T and by reducing the size of the unit with tubing and wires of equal radii. The results help further optimize a prototype magnetic separator suitable for rapid sequestration of magnetic nanospheres from the human blood stream while accommodating necessary clinical boundary conditions. 相似文献
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磁性多孔聚苯乙烯微球的制备 总被引:2,自引:0,他引:2
在磁流体存在的情况下,采用改进了的乳液聚合法合成了具有磁核的微米级高分子聚苯乙烯微球。以该微球为种子,采用分散聚合法,以乙二醇/水为分散介质、聚乙二醇为分散剂、甲苯为制孔剂,进行苯乙烯-丙烯酸-二乙烯苯的三元共聚物的合成,最终合成出粒径分布均匀、磁响应性强的磁性多孔聚苯乙烯微球。 相似文献
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磁性流体密封是一种新型密封技术,具有零泄漏、寿命长、无磨损等其他密封技术所无可比拟的优点.介绍了磁性流体、磁性流体密封的原理、理论以及数值计算.并对磁性流体密封在化肥工业上应用前景作乐观的展望. 相似文献