Ceramic Magnet Strength Rating

Ceramic magnets also known as ferrite magnets are part of the permanent magnet family and the lowest cost hard magnets available today.

Ceramic magnet strength rating.

Often sacrificing space and using more ceramic ferrite magnet alloy is a very good trade off for the low cost. If a magnet has a grade of n 42 it has a maximum energy product of 42 mgoe. For every increase of 1 the magnet s strength increases by about 1. Neodymium magnets will lose about 1 of their magnetic strength every 10 years due to self demagnetization.

The magnetic field strength is a measurement of the magnetic field s strength and direction at a particular point near the magnet. For example an n 42 magnet is about 2 stronger than an n 40 magnet. It is expressed in gauss or tesla 1 tesla 10 000 gauss. It depends on the size shape and grade of the magnet where the measurement is performed and the presence of any other magnets or ferromagnetic materials nearby.

In general the number indicates the strength of the magnet measured in megagauss oersted mgoe. Ceramic magnets have the lowest energy density of the commercially viable alloys but are by far the most cost effective. Ceramic ferrite magnets are composed of barium or strontium ferrite and the most widely used lowest cost magnet material available today. Bhmax mgoe maximum energy product measured in mega gauss oersteds this is a direct measurement of a materials maximum magnetic strength after the magnet is fully saturated charged by an external magnetic field.

Composed of strontium carbonate and iron oxide ceramic ferrite magnets are medium in magnetic strength and can be used at fairly high temperatures.