Low-frequency electromagnetic wave magnetic shielding composite paint and its preparation method

Abstract

The present invention relates to a low-frequency electromagnetic wave magnetic shield composite material and its preparation method. It is characterized by that it adopts magnetic powder, magnetic fibre and amorphous magnetic powder as magnetic conductive filling material, uses macromolecualr resin as film-forming matter, and makes them and coupling agent and solvent undergo the processes of blending, mixing, grinding and filtering at normal temp. so as to obtain the invented composite material whose magnetic shield effect can be up to 14-15 dB, so that it possesses extensive application.

Description

1. Technical field

[0001] The invention belongs to the field of low-frequency electromagnetic wave magnetic shielding materials, and relates to a low-frequency electromagnetic wave magnetic shielding composite paint and a preparation method thereof. 2. Background technology

[0002] Traditional magnetic shielding materials mostly use single materials such as thin steel plates, sheets, and thin strips. Some people use the powder metallurgy method to manufacture porous stainless steel sintered plate magnetic shielding materials. The method is to atomize the stainless steel alloy melt smelted by a high-frequency induction furnace with water to make powder, and stamp the powder into a stainless steel plate under a certain pressure. The flat plate is vacuum sintered (1273k×60min) into a stainless steel plate (thickness 4mm), and its low-frequency magnetic shielding effectiveness can reach 15dB (see "Powder Body およぴ Powder Metallurgy", No. 2, 1999, page 156).

[0003] The researc...