Magnadur
Material invented by Mullard, used for making permanent magnets
From Wikipedia, the free encyclopedia
Magnadur is a sintered barium ferrite, specifically BaFe12O19 in an anisotropic form.[1] It is used for making permanent magnets. The material was invented by Mullard and was used initially particularly for focussing rings on cathode-ray tubes. Magnadur magnets retain their magnetism well, and are often used in education, eg. as slabs with poles on the large faces.[2][3] Magnadur can also be used in DC motors.[4]
Physical characteristics
- Remanence 0.9 T
- Coercivity 110 kA/m
- Maximum energy product, 20 kJm-3 - at 86 kAm-1
