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Ceramic Magnet
Ceramic or also known as hard ferrite material are made from raw materials of strontium
carbonate and iron oxide. They are nonstrategic, readily available and low in
cost. As a result, the use of ceramic magnets in most applications is more
economical than other materials. Irreversible changes can result from very
low temperatures, and the magnetic qualitities can be restored only by
re-magnetization. Irreversible changes can be avoided by providing adequate
magnetic length, that is permeance coefficieint.