Dielectric composites, and multi-layered capacitors and electronic devices comprising thereof

A dielectric composite, comprising:

• at least one first dielectric material represented by Chemical Formula 1, and
• at least one second dielectric material represented by Chemical Formula 2,
• wherein the first dielectric material has at least one first crystal structure and the second dielectric material has a second crystal structure that is different from the first crystal structure, and
• the first dielectric material and the second dielectric material are agglomerated with each other
• A111-xA12xB12O6 Chemical Formula 1
• A212(1-y)A222yB22O7 Chemical Formula 2
• wherein, in Chemical Formula 1 and Chemical Formula 2,
• A11, A12, A21, and A22 are each independently at least one metal element having an oxidation number of 2+,
• A12 has an ionic radius which is larger than an ionic radius of A11,
• A22 has an ionic radius which is larger than an ionic radius of A21,
• B1 and B2 are each independently at least one of Nb, Ta, V, Zr, W, Mo, and Cr,
• 0≤x≤0.5, and 0≤y≤0.5.