What is the magnetic property of permanent magnet material and what index does it include?

- Aug 13, 2019-

The main magnetic properties of permanent magnet materials are: remanence (Jr, Br), coercivity (bHc), intrinsic coercivity (jHc), magnetic energy product (BH)m.These four terms are what we usually refer to as the magnetic properties of permanent magnet materials.Other magnetic properties of permanent magnet materials include Curie temperature (Tc), working temperature (Tw), temperature coefficient of remanence and intrinsic coercivity (a, b), recovery permeability (mrec.), quadrature of demagnetization curve (mrec., Hk/ jHc), high-temperature demagnetization and homogeneity of magnetic properties.


In addition to magnetic properties, the physical properties of permanent magnet materials include density, conductivity, thermal conductivity, thermal expansion coefficient, etc.Mechanical properties include vickers hardness, compressive (tensile) strength, impact toughness, etc.In addition, there is an important item in the performance index of permanent magnet material, which is the surface state and corrosion resistance.