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Anyone using Sendust (Fe,Si,Al) to absorb stray EMI?

Sendust is a magnetic metal powder that was invented by Hakaru Masumoto at Tohoku Imperial University in Sendai, Japan, about 1936 as an alternative to permalloy in inductor applications for telephone networks. Sendust composition is typically 85% iron, 9% silicon and 6% aluminum.

Molex and Oyaide make tape and sheets with varying thickness to control stray EMI.

I have used the Oyaide Sendust sheets with power distribution builds. I find it works best with power distribution. 
I would enjoy hearing others experiences. 
sonicshading
whostolethebatmobile
290 posts
 
Thanks sonicshading - Oyaide seems much more reasonable for a trial sheet. 
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geoffkait's avatar
geoffkait
23,365 posts
 
Sendust appears to be a type of mu metal, aka Kool Mu, high permeability alloy used to absorb magnetic fields in transformer applications, for example, not RF, which is a horse of a different color. 🦓  Examples of materials that are good for RF absorption/shielding include high-conductivity graphene, carbon fiber cloth, copper sheeting.
gogogadget
6 posts
 
Hi geoffkait,

clearly you are qualified to make these points?!?! Your website of tweaks  (machina dynamica) - omg...

Sendust does have more than one application
I believe they are referring to EMI (further up the spectrum sir) - and yes this material does absorb it. This is actual science not hearsay. If you bother to do your research you would know that.

But please enlighten us with your bag or tricks?!?!
geoffkait's avatar
geoffkait
23,365 posts
 
Yes, I’m qualified to make those comments. You obviously are not qualified to understand them. No offense.
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