Unleaded piezoelectric ceramic composition, piezoelectric element using same, device, and method for manufacturing unleaded piezoelectric ceramic composition
The lead-free piezoelectric ceramic composition comprises a first crystalline phase composed of a niobium / tantalate alkali-based perovskite oxide having piezoelectric properties and a second crystalline phase composed of an M-Ti-O-based spinel compound (element M is an element having a valence of 1 to 4) It contains a crystalline phase.