动态磁性对齐提高了磁性功能材料的DLP制造中的延续性和制造可靠性
Haonan Sun1,2,3, Chengqian Zhang1,2,3, Zhezai Hu1,2,3
1State Key Laboratory of Fluid Power and Mechatronic Systems, School of Mechanical Engineering, Zhejiang University, Hangzhou, China.
Advanced materials (Deerfield Beach, Fla.)
|March 4, 2026
概括
一种新的动态磁场辅助数字光处理 (DMFA-DLP) 方法改善了磁性软材料的制造. 这种技术增强了粒子对齐和材料残留,克服了以前方法的局限性.
科学领域:
- 材料科学 材料科学 材料科学
- 软物质物理学 软物质物理学
- 添加剂制造 添加剂制造 添加剂制造
背景情况:
- 具有嵌入硬磁粒子的磁性功能软材料提供先进的驱动和传感能力.
- 现有的制造方法,如磁场辅助数字光处理 (MFA-DLP),面临着由于粒子聚合而导致的低余量和打印缺陷等挑战.
- 在MFA-DLP中粒子对齐不完整导致材料性能低于最佳.
研究的目的:
- 引入一种新的动态磁场辅助数字光处理 (DMFA-DLP) 方法,以提高磁性功能软材料的制造.
- 克服传统的MFA-DLP中聚合和不完全对齐的局限性.
- 提高磁性软材料的效率,可靠性和性能.
主要方法:
- 开发和实施一个动态磁场辅助数字光处理 (DMFA-DLP) 系统.
- 利用时间变化的磁场来诱导粒子级旋转动力学,克服粒子间的吸引力.
- 在每个磁对齐周期之前确保均的粒子分散.
主要成果:
- DMFA-DLP方法显著提高了粒子对齐效率,即使在较弱的磁场下,对齐比率也提高了212%.
- 减轻颗粒聚合积累,从而提高一致性和减少印刷缺陷.
- 成功制造复杂结构,具有高分辨率的多向磁性图案,包括24极磁环用于角度传感器.
结论:
- 拟议的DMFA-DLP方法克服了传统的MFA-DLP的基本局限性,为先进的磁软材料制造建立了一个强大的平台.
- 这种技术可以创建高性能磁性软材料,具有卓越的执行和传感性能.
- DMFA-DLP提供的更高的可靠性和设计自由为机器人,传感器和生物医学设备的新应用铺平了道路.
相关概念视频
01:31Ferromagnetism
3.3K
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...
3.3K
01:26Diamagnetism
3.1K
Materials consisting of paired electrons have zero net magnetic moments. However, when these materials are placed under an external magnetic field, the moments opposite to the field are induced. Such materials are called diamagnets. Diamagnetism is the response of the diamagnets when placed in an external magnetic field.
Diamagnetism was discovered by Anton Brugmans in 1778 when he observed that bismuth gets repelled by magnetic fields, thus theorizing that diamagnets get repelled by magnets....
Diamagnetism was discovered by Anton Brugmans in 1778 when he observed that bismuth gets repelled by magnetic fields, thus theorizing that diamagnets get repelled by magnets....
3.1K
01:17Magnetic Damping
1.2K
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...
1.2K
01:24Potential Due to a Magnetized Object
847
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...
847
01:30Paramagnetism
3.1K
Paramagnets are materials with unpaired electrons that possess a finite magnetic moment. In the absence of a magnetic field, these moments are randomly oriented, and thus the net moment is zero. Under an external field, a torque acting on the moments tends to align them along the field's direction. However, the random thermal motion of electrons produces a torque opposite to the external field and tries to disorient the moments. These two competing effects align only a few moments along the...
3.1K
01:05Atomic Nuclei: Magnetic Resonance
1.3K
The number of nuclear spins aligned in the lower energy state is slightly greater than those in the higher energy state. In the presence of an external magnetic field, as the spins precess at the Larmor frequency, the excess population results in a net magnetization oriented along the z axis. When a pulse or a short burst of radio waves at the Larmor frequency is applied along the x axis, the coupling of frequencies causes resonance and flips the nuclear spins of the excess population from the...
1.3K