Dielectric porcelain composition
AssigneeTDK Corporation
InventorTomoaki Kawata
Life of this patent
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Abstract
A dielectric porcelain composition according to the present invention is composed of a main component expressed in a general formula of xBaO·y((1−t)Nd2O3·tSm2O3)·zTiO2, where 6≦x≦23, 13≦y≦30, 64≦z≦68, 0≦t<1 and x+y+z=100. The main component contains a sub component containing Cu oxide in the range of 0.1 to 3.0 wt % in terms of CuO and glass composition in the range of 2.0 to 10 wt %. Further, 90 wt % or more of the glass composition is at least one selected from SiO2, B2O3, MgO, BaO, SrO, ZnO and CaO, in the ranges of: 5 wt %≦SiO2≦15 wt %; 15 wt %≦B2O3≦25 wt %; 50 wt %≦(MgO+BaO+SrO+ZnO+CaO)≦80 wt %; 90 wt %≦(SiO2+B2O3+MgO+BaO+SrO+ZnO+CaO)≦100 wt %.
Claims3
A dielectric porcelain composition comprising:
- a main component expressed in a general formula of
- xBaO·y((1−t)Nd2O3·tSm2O3)·zTiO2;
- where 6≦x≦23, 13≦y≦30, 64≦z≦68, 0≦t<1 and x+y+z=100;
- said main component containing a sub component comprising Cu oxide in the range of 0.1 to 3.0 wt % in terms of CuO and glass composition in the range of 2.0 to 10 wt %;
- wherein 90 wt % or more of said glass composition is at least one selected from SiO2, B2O3, MgO, BaO, SrO, ZnO and CaO, and said glass composition satisfies the conditions of:
- 5 wt %≦SiO2≦15 wt %;
- 15 wt %≦B2O3≦25 wt %;
- 50 wt %≦(MgO+BaO+SrO+ZnO+CaO)≦80 wt %;
- 90 wt %≦(SiO2+B2O3+MgO+BaO+SrO+ZnO+CaO)≦100 wt %.
Dependencies are inferred from the claim text.