Dielectric ceramics and multi-layer ceramic capacitor using same
Dielectric ceramics represented as: Ca x ZrO 3 +aMn+bLi+cB+dSi and comprising: based on 100 mol of Ca x ZrO 3 (where 1.00≦x≦1.10), 0.5≦a≦4.0 mol, and 6.0≦b+c+d≦15.0 mol, in which 0.15≦b/(c+d)≦0.55, and 0.20≦d/c≦3.30 or multi-layer ceramic capacitor using the same.
1. Dielectric ceramics represented as:
Ca x ZrO 3 +aMn+bLi+cB+dSi, comprising:
based on 100 mol of Ca x ZrO 3 (where Ca and Zr include each a partial substitute, and 1.00≦x≦1.10),
0.5≦a≦4.0 mol, and
6.0≦b+c+d≦15.0 mol, in which
0.15≦b/(c+d)≦0.55, and
0.20≦d/c≦3.30.
2. Dielectric ceramics according to claim 1 , wherein a portion of Ca in the Ca x ZrO 3 is replaced by Sr.
3. Dielectric ceramics according to claim 1 , wherein a portion of Zr in the Ca x ZrO 3 is replaced by Ti.
4. Dielectric ceramics according to claim 1 , wherein Mg and/or Al is further contained.
5. Dielectric ceramics according to claim 1 , wherein a portion of Ca in the Ca x ZrO 3 is replaced by Sr and further, Mg and/or Al is contained.
6. Dielectric ceramics according to claim 1 , wherein a portion of Zr in the Ca x ZrO 3 is replaced by Ti and, further, Mg and/or Al is contained.
7. Dielectric ceramics according to claim 1 , wherein a portion of Ca in the Ca x ZrO 3 is replaced by Sr and Ti, and, further, Mg and/or Al is contained.
8. A multi-layer ceramic capacitor including a plurality of dielectric ceramic layers, an internal electrode comprising Cu or a Cu alloy formed between the dielectric ceramic layers, and an external electrode connected electrically with the internal electrode, in which the dielectric ceramic layer comprises the dielectric ceramics according to claim 1 .