Patent ID: 7172985

Claim:
A dielectric ceramic comprising: about 94â€“99.9 wt % a first component defined by Formula 1; [(Ca 1-x Sr x )O] m (Zr 1-y Ti y )O 2 Formula 1 wherein: x is no more than about 0.6; and y is no more than about 0.1; and m is at least about 0.85 to no more than about 1.15; and about 0.1â€“5 wt % a secondary component defined by Formula 2; a SiO 2 - b [Î±B 2 O 3 -(1âˆ’Î±)Li 2 O]- c AOâ€ƒâ€ƒFormula 2 wherein: a, b and c are selected to lie within the region defined by points A(a=15, b=0, c=85), B(a=70, b=0, c=30), C(a=0, b=70, c=30) and D(a=0, b=15, c=85) of a ternary diagram wherein a is mole percent SiO2; b is mole percent Î±B 2 O 3 -(1âˆ’Î±)Li 2 O; and c is mole percent AO and a+b+c=100 including the lines BC, CD and AD but excluding the line AB; Î± is 0 to 1; A is selected from Mg, Ca, Sr, Ba or a combination thereof; and 0â€“2 wt % MnO 2 .