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发明公开
CN104507890A 铁氧体烧结体和铁氧体磁芯以及线圈部件 有权

铁氧体烧结体和铁氧体磁芯以及线圈部件
摘要：
本发明提供一种导磁率高的铁氧体烧结体和铁氧体磁芯以及在该铁氧体磁芯上卷绕金属线而成的线圈部件。其具有Ni-Zn系铁氧体的晶粒和晶界，且Ti偏在于从所述晶粒的界面到晶粒直径的长径的20％的长度为止的所述晶粒的外部区域。另外，所述铁氧体烧结体包含Fe、Zn、Ni、Cu、Ti，以分别将Fe、Zn、Ni、Cu换算成氧化物后的成分的合计为100摩尔％时的组成范围是：以Fe2O3换算为48摩尔％以上且50摩尔％以下的范围含有Fe、以ZnO换算为29摩尔％以上且31摩尔％以下的范围含有Zn、以NiO换算为14摩尔％以上且16摩尔％以下的范围含有Ni、以CuO换算为5摩尔％以上且7摩尔％以下的范围含有Cu，相对于上述成分的合计100质量％，以TiO2换算为0.05质量％以上且0.30质量％以下的范围含有Ti。
摘要（英）：

The invention is to provide: a ferrite sintered body and a ferrite core which exhibit high magnetic permeability; and a coil component obtained by winding a metal wire around the ferrite core. A ferrite sintered body which comprises Ni-Zn-based ferrite grains and a grain boundary and in which Ti is distributed mainly in the outer regions of the grains, each outer region being a region spreading from the interface of each grain to an extent of 20% of the major axis of the grain. Further, the ferrite sintered body contains Fe, Zn, Ni, Cu and Ti. When taking the sum total of Fe, Zn, Ni, and Cu in terms of oxides as 100mol%: the content of Fe in terms of Fe2O3 is 48 to 50mol%; the content of Zn in terms of ZnO is 29 to 31mol%; the content of Ni in terms of NiO is 14 to 16mol%; and the content of Cu in terms of CuO is 5 to 7mol%. Further, the content of Ti in terms of TiO2 is 0.05 to 0.30mass% relative to 100mass% of the sum total of Fe, Zn, Ni and Cu in terms of oxides.

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