| 摘要 |
PROBLEM TO BE SOLVED: To provide a ferrite plate containing the ferrite composition having high real part μ' and low imaginary part μ'' of complex magnetic permeability in high frequency band (e.g. 13.56 MHz), a member for antenna element containing the ferrite plate and an antenna element containing any of them.SOLUTION: There is provided a ferrite plate which is NiCuZn ferrite having a crystal particle diameter of a sintered body before separation of 1 μm to 20 μm and has a main component containing iron oxide of 43.0 to 50.0 mol% in terms of Fe2O3, copper oxide of 2.0 to 20.0 mol% in terms of CuO, zinc oxide of 16.0 to 28.0 mol% in terms of ZnO and the balance nickel oxide, and containing titanium oxide of 0.2 to 3.0 mass% in terms of TiO2, cobalt oxide of 0.25 to 3.0 mass% in terms of CoO as accessory components to the main component excluding inevitable impurities. |
