Posted on May 27, 2009, 8:36 am, by nickmsl.
What is field attenuation?
This is also known as the shielding factor (S) and is a ratio of the magnetic field strength outside of the magnetic shield (Ha) and the resultant field on the inside of the shield ie Ha/Hi (no units) or S = 20 x log(Ha/Hi) (Db). There are various formula based on the [...]
Tags:
density,
foil,
magnetic fields,
magnetic shield,
magnetic shielding,
magnetic shields,
mu metal,
mumetal,
mumetal specifications,
nickel-iron alloy,
permeability,
sheet,
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Posted on April 3, 2009, 12:01 pm, by nickmsl.
Mumetal is one of a family of three Nickel-Iron alloys widely used to produce magnetic parts and shielding.
The three alloys concerned have the following approximate compositions and well known trade names:-
36%NiFe widely known as Supra 36, Nilomag36, Radiometal 36, Magnifer36
50%NiFe widely known as Supra 50, Nilomag 50, Radiometal 50, Magnifer 50
80%NiFe 5%Mo widely known as [...]