Patent ID: 8541102

Claim:
An (Li, Na, K, Bi)(Nb, Ta)O 3 based piezoelectric material containing Mn, wherein a surface microstructure of a sintered body of the (Li, Na, K, Bi) (Nb, Ta)O 3 based piezoelectric material is constituted of microscopic grains having grain diameters of less than 5 μm, intermediate grains having grain diameters of 5 μm or more and less than 15 μm, and coarse grains having grain diameters of 15 μm or more and 100 μm or less, and wherein the surface microstructure of the sintered both includes 10 to 60% of the microscopic grains and 1% or more of the coarse grains in share of grains in terms of area.