**Magnetodielectric Materials**

76 Dielectric Material

Materials 143:419

[60] Vallery, R. S.; Liu, M.; Gidley, D. W.; Yim, J-H. 2011. Microporous and Mesoporous

**Chapter 4** 

© 2012 Hoble and Silaghi , licensee InTech. This is an open access chapter distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

© 2012 The Author(s). Licensee InTech. This chapter is distributed under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution,

*NI Rm i* (1)

**Magnetodielectric Materials –** 

Additional information is available at the end of the chapter

structure is equivalent electric circuit in Figure 2.

Ohm's Law applied to the magnetic circuit is:

environment, Rme, of the inductor coils

and used in the study approached the work.

D.A. Hoble and M.A. Silaghi

http://dx.doi.org/10.5772/2781

**1. Introduction** 

**Use in Inductive Heating Process** 

In the induction heating processes, the main problem is to increase process efficiency, which can be achieved through the intervention of different parts of the installation [9,10,11]

A method used to increase electrical energy conversion efficiency, which is referred to in the literature and that also was considered in the study discussed in this paper is to use magnetic flux concentrator[1,2,6]. If we analyze the structure of hypothetical wound inductors, located close to a work piece, as shown in Figure 1, we can see that for this

The magnetic reluctance equivalent of the system consists of two parallel reluctance: magnetic reluctance of the work piece Rmp and the air gap magnetic reluctance between spiral inductors and piece of heated, Rma, in series with the magnetic reluctance of outside

If the magnetic reluctance of the piece, Rmp, depends on the material characteristics, and the air gap reluctance Rma can not be reduced below a value that depends on technological conditions of the heating process, remains the method of intervention to reduce the equivalent reluctance

This is actually the role of magnetic field concentrator using in inductive heating processes. To achieve these magnetic concentrators in practice it is using a variety of materials and could therefore be useful brief review of their focusing on magnetodielectric materials made

and reproduction in any medium, provided the original work is properly cited.

of the system, improving the environment reluctance outside coils inductors, Rme.

**Chapter 4** 
