FERRITE MATERIAL AND INDUCTANCE ELEMENT

摘要

PROBLEM TO BE SOLVED: To inexpensively provide Ni-Zn system or Ni-Zn-Cu system ferrite materials and inductance elements capable of extremely reducing the change of inductance values(L values) of coil type inductance elements and lamination type inductance elements at the time of DC superimpose, and easily reducing the size and height of the elements without increasing man-hours or the number of parts by executing the composition improvement of the ferrite materials themselves.

SOLUTION: The specific quantities of ZrO2and SiO2are simultaneously added to Ni-Zn system or Ni-Zn-Cu system ferrite materials so that the change of the permeability of the ferrite materials equivalent to the L values of inductance elements at the time of DC superimpose can be reduced, and that the size and height reduction of the elements can be realized while the structural change of the elements can be prevented.

COPYRIGHT: (C)2004,JPO