Repeatable rotational vibration device for the directional fabrication of anisotropic functional materials in high magnetic fields

Under high magnetic fields (HMFs), filler agglomeration and steric hindrance severely limit the alignment of high-concentration anisotropic materials. While coupled rotation and vibration resolve this problem, achieving effective magnetic shielding and precise device control in extreme magnetic environments remains a technical challenge. In this work, we propose a repeatable rotational vibration device (RVD) specifically designed for a 10 T superconducting magnet. Compared to pure HMFs, the synergistic effect of HMF+RVD achieves effective densification (density increase of 0.04 g/cm3 with a significantly narrowed 95% confidence interval) and near-perfect uniaxial orientation (the full width at half maximum is reduced by nearly 40%). The device employs a hierarchical cavity truss structure and a magnetic shielding system, achieving a 32-fold increase in support stiffness and an 82.4% reduction in magnetic field attenuation at the actuator. Through active multi-channel adjustment and eccentric compensation mechanisms, the device exhibits extremely high operational stability (amplitude fluctuation <5% and speed deviation ≤ ±0.1 rpm). This research provides a robust hardware paradigm for simultaneously achieving ultrahigh densification and extreme orientation of materials under extreme magnetic fields, opening new avenues for the fabrication of next-generation high-performance anisotropic materials.