What is the magnetic permeability of clay?

AI Thread Summary
The discussion revolves around applying the law of mixtures to a clay-steel magnetic composite, specifically seeking the magnetic permeability of clay to determine the optimal mass ratio. While the permeability and density of steel are readily available, finding the magnetic permeability of clay proves challenging, as most online resources focus on its permeability in relation to water. A user provides a helpful link to a relevant document, which contains the necessary information. Additionally, it is noted that when using the law of mixtures, applying proportions to the reciprocals of permeability may yield more accurate results, as magnetic flux requires a suitable path through the composite materials.
inventor1488
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I am trying to apply the law of mixtures to a clay-steel magnetic composite. To determine the optimal ratio per unit mass I need the permeability of steel and clay and the density of steel and clay. The permeability permeability of steel and the density of steel and clay is easy enough to find. The permeability of clay is another story.

When I google it I usually find permeability in a "permeable by water" sense, not the "permeable by magnetism" sense.

Anyone have this value or know where to find it?

Thanks for ANY help you can provide!
 
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welcome to pf!

hi inventor1488! welcome to pf! :smile:

does this help? …

http://www.civil.iitb.ac.in/~dns/IACMAG08/pdfs/E13.pdf​
 
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tiny-tim said:
does this help? …
http://www.civil.iitb.ac.in/~dns/IACMAG08/pdfs/E13.pdf​

Why yes! Yes it does!
 
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in case you're wondering, i googled "magnetic permeability" of clay (with the quotes), and it was the third hit :wink:
 
You will get bizarre claims with the so-called "law" of mixtures. Magnetic flux needs a path to, sort of, percolate through you mix.

To the very least, you should apply proportions to the reciprocals of permeability. This will be less false.
 

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