Composite sintered body of dielectric substance and magnetic substance, and LC composite electronic component
A composite sintered body of dielectric substance and magnetic substance comprises a hexagonal Ba ferrite crystal, a perovskite type crystal containing at least one element selected from Ca, Sr, and Ba, and Ti, and Li element, and the relative magnetic permeability is 1.4 or more at 1 GHz. LC composite electronic component comprises the composite sintered body, a condenser circuit formed in the inside or the surface of the composite sintered body, and an inductor circuit formed in the inside or the surface of the composite sintered body.
1. A composite sintered body of dielectric substance and magnetic substance comprising:
a hexagonal Ba ferrite crystal;
a perovskite type crystal containing at least one element selected from Ca, Sr, and Ba, and Ti; and
Li element;
wherein the relative magnetic permeability is 1.4 or more at 1 GHz.
2. The composite sintered body according to claim 1 , wherein the main composition of the composite sintered body is 55˜95 vol % of the hexagonal Ba ferrite crystal, and 5˜45 vol % of the perovskite type crystal.
3. The composite sintered body according to claim 1 , further comprising glass, wherein glass contains Si, Ca, Ba and Li, and is substantially free from Al and B.
4. The composite sintered body according to claim 3 , wherein the hexagonal Ba ferrite crystal is mainly a Y type hexagonal Ba ferrite crystal.
5. The composite sintered body according to claim 4 , wherein the perovskite type crystal is BaTiO 3 .
6. The composite sintered body according to claim 4 , wherein the perovskite type crystal is CaTiO 3 or SrTiO 3 .
7. The composite sintered body according to claim 4 , wherein the composite sintered body is substantially free from BaAl 2 Si 2 O 8 crystal, BaB 2 O 4 crystal, ZnAl 2 O 4 crystal and CaAl 2 Si 2 O 8 crystal.
8. A LC composite electronic component comprising:
the composite sintered body according to claim 1 ;
a condenser circuit formed in the inside or the surface of the composite sintered body; and
an inductor circuit formed in the inside or the surface of the composite sintered body.