Dielectric ceramic, method of preparing the same, and multilayer ceramic capacitor including the same

A multilayer ceramic capacitor, comprising

• a capacitor body including a dielectric layer and an internal electrode layer, and
• an external electrode disposed on an outer surface of the capacitor body,
• wherein the dielectric layer comprises a dielectric ceramic comprising a KNN-SZ compound represented by Chemical Formula 1 and iron oxide;
• wherein 0.10≤x≤0.20 and 0.40≤y≤0.50.

A method of preparing a dielectric ceramic, comprising

• preparing a mixture by mixing a K-containing compound, a Na-containing compound, a Nb-containing compound, a Sr-containing compound, a Zr-containing compound, and iron oxide;
• preparing a pellet by calcining and compressing the mixture;
• and
• sintering the pellet to prepare the dielectric ceramic including a KNN-SZ compound represented by Chemical Formula 1 and iron oxide;
• wherein 0.10≤x≤0.20 and 0.40≤y≤0.50.