IMA Catalog - IMA - #1

FERRITE MAGNETS

DESCRIPTION AND FEATURES

applications like automation, control, measurement, etc.

Ferrite magnets may be isotropic or anisotropic. In anisotropic qualities, during the pressing process, a magnetic field is applied. This process lines up the particles in one direction, obtaining better magnetic features.

Through sintering, (thermal processing at high temperatures), pieces in their definite shape and solidity are obtained.

FACTS

Ferrite magnets have BaFe"0¹⁵ or SrFe'^O¹⁹ stoichiometry and are ceramic oxides. They are made up of approx. 80% of Iron oxide (Fe203| and approx. 20% of barium oxide (BaO) or strontium oxide (SrO). The raw materials are easy to purchase and have a low cost. These magnets are resistant to many chemical substances, such as dissolvent, bleach ¡11 Ki ■■.'.■(;;iK ;.:i::K O^iiinir n\y,i "o-yiii ii' ^lo'-y ,k.(:;; xw- ;is; -jxhWi: iidds i-yiiroc-- w t: iii.i'.l;;. aulrjhiiii^ t;i>L:s 0' hydrol L.oric acids, determine stability mainly by temperature, concentration and corrosion timing of the environment. Normally, stability is determined by long-term experiments.

Due to its ceramic qualities, ferriles are frag:ip nnri lirsaknr: s..sr-,epi ~> :■ Hue :c its '.ixiiess (Mohs 6-7). their machining is done by diamond. Other physical facts are shown In charts in the following pages.

Magnetic properties are also found in the following pages in diagrams and charts. Ferrite working temperatures are mainly between -4u°C and 250°C.