| 摘要 |
PURPOSE:To obtain improved magnetic material for microwave and millimeter wave by a method wherein magnetic saturation (4piMs) is made possible to be set at an optimum value by replacing a part of pure lithium ferrite Li0.5Fe2.5 O4 with Ti, and besides, the Ti is replaced with Mn. CONSTITUTION:In a composition indicated by a formula LixFeyTizO0.5+y+1.5z (where x+y+z=1) x, y and z are in the range of 0.15<=x<=0.30, 0.55<=y<=0.85, and O<=z<=0.30 respectively, Ti does not contain O-atom % because of Mn, 100 atom % or less which is replaced is used as the main component, and plumbic oxide of 0.01 to 0.5mol%, indicated in the form of PbO, is added to the above. Accordingly, the material having the value of 4piMs, which is optimum to the frequency to be used, can be selected, and as the Curie point is high, the temperature variation rate of the 4piMs in the neighborhood of room temperature is small, and besides, ferromagnetic resonance absorption half power width and dielectric loss are sufficiently small. As a result, a magnetic member having excellent microwave and millimeter wave characteristics can be obtained. |
