ferrite core,magnetic core,magnetic ring-Careful Magnetism & Electron Group

Impeder Ferrite

Ferrite impeder cores are used fo r concentration of magnetic flux in high frequency, RF, induction welding of steel tubes and pipes. In this application ferrite core experiences temperature upto 150 C and the core properties must be optimized for this environment. Properties which influences the efficiency and the speed of the process are :
  • A high permeability (u) material to ensure high degree of magnetic flux concentration.

  • A high Saturation flux density Bs, at the working temperature, which determines, the maximum field in which the ferrite core can usually perform.

  • A high curie temperature at which the material ceased to concentrate magnetic flux, due to loss of ferrimagnetic properties.
For these applications, special ferrite materials are offered - They are having following excellent physical properties.
  • High Curie temperature and a low temperature dependence of the initial permeability and of magnetic flux density in the working temperature range.

  • A high saturation flux density in the working temperature range upto 150 C.

  • Low losses with increase of temperature.

  • A relative high amplitude permeability.

  • A high stability of the initial permeability vs. frequency upto 1 MHz.
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