# B How to create a material with specific characteristics

1. Sep 11, 2017

### Sveral

Hi,
could anyone tell me, if they have any ideas as to, what materials could be combined to produce a material with two characteristics- electrical conductivity of about 10 S/m and magnetic permeability of 7500.

2. Sep 11, 2017

### Cloud Variable

What are you looking for? Liquid, Solid, Gas, Metal, Pure, Alloy? If you had an alloy of the right materials in the right amounts the values would eventually correlate with what you want.

3. Sep 11, 2017

### Sveral

Good question, my bad there. A solid definitely, but thats about it, when it comes to the state of the material.

4. Sep 11, 2017

### Lord Jestocost

• A composite can be considered as a so-called effective medium with homogeneous material properties (e.g., effective conductivity and effective permeability). "Effective medium theories" allow to predict the effective properties as a function of the volume filling factors of the dispersed material particles. Maybe, it will be difficult to tailor two properties simultaneously.
• On the other hand, it's possible that some ferrites have roughly these values for the electrical conductivity and magnetic permeability.

Last edited: Sep 11, 2017
5. Sep 12, 2017

### Sveral

6. Sep 12, 2017

### Sveral

Too many copies:D Still given those two charts iron stands out as an element, that must be used, but its not enough alone...

7. Sep 12, 2017

### Lord Jestocost

To reflect on composites (https://en.wikipedia.org/wiki/Composite_material) when one wants to produce materials with tailored physical characteristics is generally a good idea. Nevertheless, it can become - both scientifically and technologically - a challenging task to synthesize a material with specific properties by this means. That means, one needs to do more than looking for constituent materials which might – in combination - produce a material with characteristics different from the individual components. One has also to find a manufacturing process to finally “realize” such a combination.

Regarding generally a material with two characteristics- electrical conductivity of about 10 S/m and magnetic permeability of 7500: I suppose that MnZn ferrites (MnaZn(1-a)Fe2O4) might be suitable.