|WikiProject Physics||(Rated Start-class, Mid-importance)|
there are many references to nickel and zinc in ferrites. Are these wrong?
"Today, they are the most commonly used magnets in radios. The maximum magnetic field B is about 0.35 tesla and the magnetic field strength H is about 30 to 160 kiloampere turns per meter (400 to 2000 oersteds). (Hill 2006)"
Sorry but in my opinion these must be old informations; with actual (2007) numeric values it would be: The maximum magnetic field B is about 0.43 tesla and the magnetic field strength H is about 30 to 360 kiloampere turns per meter (not doped)and B is about 0,44 tesla, H is about 380 kA/m for doped materials.
Maybe, somebody with better command of English than me could change this in the articel.
should Chemie.de get a mention, as the majority of this information was ripped off, word for word, from their site? —Preceding unsigned comment added by 126.96.36.199 (talk) 10:36, 4 January 2008 (UTC)
- I am quite sure none of this information was "ripped off, word for word" from chemie.de. Amongst other things, chemie.de has no English on it whatsoever; furthermore, I can make out from what litle German I know that the information is not even similar in phrasing and formatting. 188.8.131.52 (talk) 17:17, 29 May 2011 (UTC)
NiZn Chem formula
i have been looking up ratios of atoms by looking at the chem formulas. it does appear that the NiZn formula is incorrect, unlike the simularity between mixes in hard ferrites of strontium and barium, the MnZn and NiZn are not the same. NiZn is quite approximate being NiZnFe4O4, while the MnZn is a mix of Fe2O2 (52%), MnO (25%) and ZnO (23%), this is an average. the source of my averages are: Wei Zhu, "On Preparation of High Permeability Mn-Zn Ferrite" and the NiZn formula is reasonably common on the 'net though some lack the "O4". i did find another book (Physics for Engineers By M R Srinivasan) to double check once more, that lists them as follows: 48%MnO Fe2O3, 52%ZnO Fe2O3 and 36%NiO Fe2O3, 64%ZnOFe2O3 showing a minor descrepency with the former source. it could just be the lack of available information that has lead people to beleive that NiZn is stoich...Charlieb000 (talk) 00:26, 4 March 2012 (UTC)