EPCOSGeneral Ferrite Information
Ferrite is a Polycrystal, sintered material with high electrical resistivity. The high resistance of ferrite makes eddy current losses extremely low at high frequencies. Therefore, unlike other magnetic, ferrite can be used at considerably high frequencies. Manganese-zinc(Mn-Zn) ferrites can be used at frequencies up to several megahertz.
The basic ferrite materials are obtained in an extremely high purity. These materials are mixed, calcined, milled, granulated, formed by pressing, and sintered at a temperature of 1000°C to 1400°C, then machined. The electrical and mechanical properties of a particular ferrite material are obtained by the material formulation and the processing applied. Extraordinary exacting process controls are required to assure the high uniformity of product for which TDK ferrites are well known. Through the above processes, ferrite materials can be optimised for specific applications.
Each of these materials can be produced in cores of various shapes. Shapes wich are popular for the listed applications are:
APPLICATIONS, CHARACTERISTICS AND TDK CORE TYPE
TDK produces a very large variety of cores and magnetic properties. Nearly every requirement can be satisfied among these products.
TYPICAL TECHNICAL DATA
* These values are typical at room temperature.
Please click for further general Ferrite information:
RoHS Information on TDK Ferrites
Terms Definitions and Explanations
How to glue
The basic ferrite materials are obtained in an extremely high purity. These materials are mixed, calcined, milled, granulated, formed by pressing, and sintered at a temperature of 1000°C to 1400°C, then machined. The electrical and mechanical properties of a particular ferrite material are obtained by the material formulation and the processing applied. Extraordinary exacting process controls are required to assure the high uniformity of product for which TDK ferrites are well known. Through the above processes, ferrite materials can be optimised for specific applications.
Each of these materials can be produced in cores of various shapes. Shapes wich are popular for the listed applications are:
APPLICATIONS, CHARACTERISTICS AND TDK CORE TYPE
| Applications | Ferrite characteristics | TDK core type |
|---|---|---|
| Filters | Low loss, magnetic stability, high permeability | Pot and RM cores |
| Signal transformers | High saturation flux density, high permeability | EP, EE, Pot and RM cores |
| Power conversion transformers | High saturation flux density, low power loss | El, EC, Pot and RM cores |
TDK produces a very large variety of cores and magnetic properties. Nearly every requirement can be satisfied among these products.
TYPICAL TECHNICAL DATA
| Dielectric constant | Ferrite characteristics | TDK core type |
|---|---|---|
| Filters |
Mn-Zn ferrite Na-Zn ferrite |
240 to 300 10 to 13 |
| Specific heat | 800(J/Kg*°C) | |
| Thermal conductivity | 1 to 5(Wm*°C) | |
| Coefficient of thermal linear expansion | 7 to10(ppm°C) | |
| Modulus of elasticity | 1.2x10exp11(N/m²) | |
| Vickers hardness | 550 |
* These values are typical at room temperature.
Please click for further general Ferrite information:
RoHS Information on TDK Ferrites
Terms Definitions and Explanations
How to glue
