| 摘要 |
In the conventional technique, when a composite laminate in which a first ceramic layer comprising a glass ceramic material and a second ceramic layer comprising a ceramic magnetic material are layered is co-sintered, glass components diffuse into the second ceramic layer from the first ceramic layer, and as a result, the sintering properties of the second ceramic layer are reduced, and insulation resistance may be reduced. A first ceramic layer (2) in a composite laminate (4) provided to a common mode choke coil (1) is configured from a sintered compact of a glass ceramic material including: 40-90 wt% of glass including 0.5-5 wt% K2O, 0-5 wt% Al2O3, 10-25 wt% B2O3, and 70-85 wt% SiO2; and 10-60 wt% of a filler including alumina and quartz; the filler including the alumina in an amount of 1-10 wt% of the total amount of glass and filler. It is speculated that a portion of the alumina reacts with the glass during firing, and the glass viscosity increases. |
