What is the magnetic permeability of clay?

Click For Summary

Discussion Overview

The discussion centers on the magnetic permeability of clay, particularly in the context of creating a clay-steel magnetic composite. Participants explore the challenges of finding accurate permeability values for clay compared to steel, and the implications for applying the law of mixtures in this scenario.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant seeks the magnetic permeability of clay for use in a clay-steel composite, noting the difficulty in finding this information compared to the permeability of steel.
  • Another participant provides a link to a resource that may contain relevant information about the magnetic permeability of clay.
  • A later reply confirms that the provided link was helpful in finding the needed information.
  • One participant comments on the search process for magnetic permeability, indicating that specific search terms can yield better results.
  • Another participant critiques the application of the law of mixtures for magnetic permeability, suggesting that using the reciprocals of permeability may yield more accurate results.

Areas of Agreement / Disagreement

Participants express differing views on the application of the law of mixtures for magnetic permeability, with some supporting its use while others argue for a different approach. The discussion does not reach a consensus on the best method for calculating the permeability of the composite.

Contextual Notes

There is uncertainty regarding the exact magnetic permeability of clay, and the discussion highlights the potential for confusion between different definitions of permeability. Additionally, the effectiveness of the law of mixtures in this context remains unresolved.

inventor1488
Messages
2
Reaction score
0
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!
 
Engineering news on Phys.org
welcome to pf!

hi inventor1488! welcome to pf! :smile:

does this help? …

http://www.civil.iitb.ac.in/~dns/IACMAG08/pdfs/E13.pdf​
 
Last edited by a moderator:


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

Why yes! Yes it does!
 
Last edited by a moderator:
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.
 

Similar threads

  • · Replies 4 ·
Replies
4
Views
3K
  • · Replies 3 ·
Replies
3
Views
4K
  • · Replies 9 ·
Replies
9
Views
2K
  • · Replies 3 ·
Replies
3
Views
1K
  • · Replies 2 ·
Replies
2
Views
3K
  • · Replies 1 ·
Replies
1
Views
12K
  • · Replies 5 ·
Replies
5
Views
2K
Replies
2
Views
3K
  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 1 ·
Replies
1
Views
2K