以氧化铁微纤维装饰的棉布为基础的被动电气组件:静电和脉冲磁场对等效电气性能的影响
Ioan Bica1,2, Eugen Mircea Anitas3,4, Hyoung-Jin Choi5
1Department of Physics, West University of Timisoara, V. Parvan Avenue 4, 300223 Timisoara, Romania.
Micromachines
|November 25, 2023
概括
新的被动电气组件 (PEC) 在棉织物中使用氧化铁微纤维. 这些组件显示了电气性能与磁场的显著变化,使其能够用于传感和电磁雾防护.
科学领域:
- 材料科学 材料科学 材料科学
- 电气工程 电气工程
- 纳米技术 纳米技术
背景情况:
- 开发低成本,环保的被动电气组件 (PEC) 对先进的电子应用至关重要.
- 氧化铁微纤维 (μFe) 具有独特的磁性和半导体性能,适用于功能性材料.
研究的目的:
- 用不同数量的氧化铁微纤维制造和描述使用棉织物复合材料的新型PEC.
- 研究静态和脉冲磁场对这些PEC的电特性 (电容和电阻) 的影响.
- 探索这些磁场响应PEC的潜在应用.
主要方法:
- 通过用油和氧化铁微纤维 (血,磁,磁铁) 浸棉织物制造PEC.
- 在静态和脉冲磁场 (B) 下测量等效电容 (Cp) 和电阻 (Rp),在1kHz时达到175mT.
- 分析Cp和Rp的歇斯底里曲线,以应对不同的磁流密度.
主要成果:
- 微纤维体积分数和磁流密度对PEC的电性能 (Cp和Rp) 有显著的影响.
- 血 (α-Fe2O3) 和磁石 (γ-Fe2O3) 的半导体特性有助于观察到的磁场反应.
- 歇斯底里曲线的最大相对变异在B 175 mT时达到Cp的~3.35%和Rp的~3.18%.
- PEC对脉冲磁场表现出快速反应,Cp和Rp密切跟踪磁场变化.
结论:
- 开发的PEC显示了由磁场调节的可调节的电特性,归因于氧化铁微纤维组成.
- 对脉冲磁场的快速响应使这些PEC适用于传感器应用.
- 潜在的应用包括电磁场传感器,机械应力传感器,电磁烟雾保护,医疗监测和人机接口.
相关概念视频
Induced Electric Fields: Applications
1.6K
An important distinction exists between the electric field induced by a changing magnetic field and the electrostatic field produced by a fixed charge distribution. Specifically, the induced electric field is nonconservative because it does not work in moving a charge over a closed path. In contrast, the electrostatic field is conservative and does no net work over a closed path. Hence, electric potential can be associated with the electrostatic field but not the induced field. The following...
1.6K
Magnetic Damping
464
Eddy currents can produce significant drag on motion, called magnetic damping. For instance, when a metallic pendulum bob swings between the poles of a strong magnet, significant drag acts on the bob as it enters and leaves the field, quickly damping the motion.
If, however, the bob is a slotted metal plate, the magnet produces a much smaller effect. When a slotted metal plate enters the field, an emf is induced by the change in flux; however, it is less effective because the slots limit the...
If, however, the bob is a slotted metal plate, the magnet produces a much smaller effect. When a slotted metal plate enters the field, an emf is induced by the change in flux; however, it is less effective because the slots limit the...
464
Motional Emf
3.2K
Magnetic flux depends on three factors: the strength of the magnetic field, the area through which the field lines pass, and the field's orientation with respect to the surface area. If any of these quantities vary, a corresponding variation in magnetic flux occurs. If the area through which the magnetic field lines are passing changes, then the magnetic flux also changes. This change in the area can be of two types: the flux through the rectangular loop increases as it moves into the...
3.2K
Electromagnetic Fields
2.1K
Electric fields generated by static charges, often referred to as electrostatic fields, are characteristically different from electric fields created by time-varying magnetic fields. While the former is a conservative field, implying that no net work is done on a test charge if it goes around in a complete loop in the field, the latter is, by definition, not a conservative field; net work is done, and it is proportional to the rate of change of magnetic flux.
However, the observation of...
However, the observation of...
2.1K
Ferromagnetism
2.4K
Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
2.4K
Potential Due to a Magnetized Object
293
Magnetic dipoles in magnetic materials are aligned when placed under an external magnetic field. For paramagnets and ferromagnets, dipole alignment occurs in the direction of the magnetic field. However, the dipoles align opposite to the field in the case of diamagnets. This state of magnetic polarization due to the external field is called magnetization. Magnetization is defined as the dipole moment per unit volume. It plays a similar role to polarization in electrostatics.
The vector...
The vector...
293


