Magnadur
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.[2][3] Magnadur can also be used in DC motors.[4]
Physical characteristics
[edit]- Remanence 0.9 T
- Coercivity 110 kA/m
- Maximum energy product, 20 kJm-3 - at 86 kAm-1
References
[edit]- ^ Book of Data. p. 132. ISBN 0-582-35448-X.
- ^ "Play with magnets". practicalphysics.org.
- ^ Wenham, Martin W. (18 November 2004). Understanding Primary Science: Ideas, Concepts and Explanations. SAGE Publications Ltd. p. 234. ISBN 1412901634.
- ^ Magnadur Magnets for Direct Current Motors. Mullard Ltd. 31 December 1970. ISBN 0901232106.
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