Design of novel soft magnetic composites based on Fe/resin modified with silica

作者：Streckova M^*; Medvecky L'; Fuezer J; Kollar P; Bures R; Faberova M

来源：Materials Letters, 2013, 101: 37-40.

DOI：10.1016/j.matlet.2013.03.067

• Polymeric composites
• Magnetic materials
• Powder technology
• Sol-gel preparation

Mechanical, magnetic and electrical properties of a novel family of soft magnetic composites (SMCs) are studied in detail. The phenolic resin serving as electrical insulating layer in designed Fe/resin composites was modified by 3-glycidoxypropyltrimethoxysilane and tetraethylorthosilicate. The chemical bonding between organic and inorganic parts of a polymer matrix was confirmed by FTIR spectroscopy. Mechanical hardness, flexural strength and distribution of SiO2 nano-particles were substantially improved by using silane coupling agents. The hybrid insulating layer results in a defect-free structure of prepared green compacts, which consequently exhibit a higher permeability and lower eddy current losses.

• 出版日期2013-6-15