the density of ferrite magnets is about 5 g/cm 3. the most common hard ferrites are: strontium ferrite srfe 12 o 19 (sro·6fe 2 o 3) used in small electric motors micro-wave devices recording media magneto-optic media telecommunication and electronic industry.
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a ferrite is a ceramic material made by mixing and firing large proportions of iron(iii) oxide (fe 2 o 3 rust) blended with small proportions of one or more additional metallic elements such as barium manganese nickel and zinc. they are both electrically non-conductive meaning that they are insulators and ferrimagnetic meaning they can easily be magnetized or attracted to a magnet.
indian journal of engineering & materials sciences vol. 7 october-december 2000 pp. 364-369 strontium ferrite permanent magnet-an overview amitabh vermaa 0 p pandeyb & puneet sharmab b thapar institute of engineering and technology patiala 147 001 india a materials science di vision thapar centre for industrial research and development patiala 147001 india
strontium is the chemical element with the symbol sr and atomic number 38. an alkaline earth metal strontium is a soft silver-white yellowish metallic element that is highly chemically reactive. the metal forms a dark oxide layer when it is exposed to air.
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