In summary, the conversation revolves around the potential effects of using a soft magnetic material as a dielectric in a parallel plate capacitor. The discussion touches on the possible changes in capacitance value and the lossy characteristics of the capacitor. The link provided describes the relative permittivity of a capacitor with ferrite as a dielectric, which is around 14 and can result in lower capacitance and higher loss at higher frequencies due to the material's conductivity. There is a question about which ferrite material has the lowest conductivity.
  • #1
Stephen03
2
0
Odd question, would anybody know what would happen if a parallel plate capacitor (good conductor) had a soft magnetic material (fairly poor conductor) as a dielectric? What would be the DC/AC electrical characteristics of this?
 
Physics news on Phys.org
  • #2
Stephen03 said:
Odd question, would anybody know what would happen if a parallel plate capacitor (good conductor) had a soft magnetic material (fairly poor conductor) as a dielectric? What would be the DC/AC electrical characteristics of this?

Welcome to the PF.

What are your thoughts? What would the effect on the value of the capacitance be? What would happen to the lossy characteristics of the capacitor? Why?
 
  • #3
berkeman said:
Welcome to the PF.

What are your thoughts? What would the effect on the value of the capacitance be? What would happen to the lossy characteristics of the capacitor? Why?

Hi berkeman,
I have actually found an article that I wasn't able to find yesterday describing the permittivity of a capacitor with a ferrite as a dielectric. Here is the link (http://tdserver1.fnal.gov/tdlibry/TD-Notes/2007 Tech Notes/TD-07-014.pdf). The results were that the relative permittivity was close to 14. Assuming this fairly accurate with all ferrite materials, this wouldn't be that good of a capacitor. It is also fairly lossy at higher frequencies. This makes sense as ferrite materials are still somewhat conductive. Off the top of your head, what ferrite would you say has the lowest conductivity?
 

1. What is a capacitor with magnetic dielectric?

A capacitor with magnetic dielectric is a type of capacitor that uses a material with magnetic properties as the dielectric between its two plates, instead of a traditional non-magnetic material such as air or plastic.

2. How does a capacitor with magnetic dielectric differ from a regular capacitor?

The main difference is the type of dielectric material used. A capacitor with magnetic dielectric has a higher capacitance compared to a regular capacitor of the same size, and is able to store and release energy more efficiently due to the magnetic properties of the dielectric material.

3. What are the advantages of using a capacitor with magnetic dielectric?

A capacitor with magnetic dielectric has a higher capacitance which allows it to store more energy, and is also able to operate at higher frequencies and temperatures. It also has lower losses and can handle higher voltages compared to regular capacitors.

4. Where are capacitors with magnetic dielectric commonly used?

These types of capacitors are commonly used in applications where high power and high frequency are required, such as in power electronics, telecommunications, and aerospace industries.

5. Are there any limitations to using a capacitor with magnetic dielectric?

One limitation is that these capacitors can be more expensive compared to regular capacitors due to the specialized materials used. They also have a higher self-resonant frequency, which may not be suitable for all applications.

Similar threads

  • Electromagnetism
Replies
5
Views
311
Replies
8
Views
978
Replies
12
Views
2K
  • Introductory Physics Homework Help
Replies
6
Views
309
Replies
7
Views
1K
Replies
2
Views
968
Replies
4
Views
352
Replies
2
Views
3K
  • Electromagnetism
Replies
19
Views
2K
  • Electromagnetism
Replies
7
Views
1K
Back
Top