A review of the hybrid techniques for the fabrication of hard magnetic microactuators based on bonded magnetic powders

作者：Pallapa M^*; Yeow J T W

来源：Smart Materials and Structures, 2015, 24(2): 025007.

DOI：10.1088/0964-1726/24/2/025007

• permanent magnets
• hybrid polymer magnetic fabrication
• polymer magnetic actuators
• bonded magnets
• matrix material
• loading density

Polymer composites based on permanent magnetic bonded powders exhibit immense potential for applications in microactuators and sensors with magnetic performances comparable to their fully dense counterparts. While fabrication and integration of magnetic devices based on bonded magnetic powders is challenging via conventional deposition and electrochemical growth techniques, hybrid fabrication offers a promising alternative. This paper presents the evolution of permanent magnetic materials into bonded magnetic powders, the magnetic performance figures of merit of permanent magnetic materials significant for the design and manufacture of polymer based sensors and actuators. A review of the hybrid fabrication techniques such as replica molding, squeegee coating, spin casting etc are reported. Critical factors affecting the fabrication of polymer magnetic composites such as filler particle size and effect of magnetic field during fabrication are discussed. Prior art based on polymer magnetic composites for the fabrication of hard magnetic films and hard magnetic actuators are presented.

• 出版日期2015-2