Physics:Magnadur
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Short description: Material invented by Mullard, used for making permanent magnets
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
- Remanence 0.9 T
- Coercivity 110 kA/m
- Maximum energy product, 20 kJm-3 - at 86 kAm-1
References
- ↑ Book of Data. p. 132. ISBN 0-582-35448-X.
- ↑ "Play with magnets". http://practicalphysics.org/play-magnets.html.
- ↑ Wenham, Martin W. (18 November 2004). Understanding Primary Science: Ideas, Concepts and Explanations. SAGE Publications Ltd. p. 234. ISBN 1412901634. https://archive.org/details/understandingpri0000wenh/page/234.
- ↑ Magnadur Magnets for Direct Current Motors. Mullard Ltd. 31 December 1970. ISBN 0901232106.
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