Dielectric composition for high frequency resonators

A dielectric material having a composite perovskite crystal structure including K, Mg, Sb, Ba and Nb as metallic elements in a main crystal phase and having a compositional formula represented by

• (1−x)Baα(MgβNbγSbδ)O3-xKpNbO3,
• wherein x, α, β, γ, δ and p have values satisfying the conditions
• 0<x≦0.1, 0.9 ≦α≦1.3, 0.3≦β≦0.35, 0<δ≦0.125, β+γ+δ=1 and 1≦p≦2.

A dielectric material having a composite perovskite crystal structure including Sn, K, Mg, Sb, Ba and Nb as metallic elements in a main crystal phase and having a compositional formula represented by

• (1−x){(1−y)Baα(MgβNbγSbδ)O3-yBaSnO3}-xKpNbO3,
• wherein x, y, α, β, γ, δ and p have values satisfying the conditions
• 0<x≦0.1, 0<y≦0.5, 0.9≦α≦1.3, 0.3≦β≦0.35, 0<δ≦0.125, β+γ+δ=1 and 1≦p≦2.