| abstract |
The present invention relates to a magnetic particle and a method of manufacturing the same, and more particularly, a core in which a plurality of superparamagnetic nanoparticles are dispersed and embedded in a dielectric or polymer matrix; And a magnetic particle having a continuous or discontinuous void portion formed between the core and the shell or in the shell, wherein the gap or diameter of the void portion is at least 10 nm, and a method of manufacturing the same, which is easy even in a weak magnetic field. It has the advantage of exhibiting high sensitivity magnetic properties, having high brightness, controlling specific gravity, controlling color differently from the color of dark magnetic material itself, and having high oil absorption and large surface area, which is color It can be used in inks, general paints, automotive powder pigments, cosmetic pigments, catalyst paints, in particular, it is used as a security ink of the oil price certificate, there is an advantage that can conceal the area and shape to which the security particles are applied. |