The chemical compound which possesses piezoelectric property, the piezo-electric device and the liquid emission head and the ultrasonic motor null general expression which

摘要

A compound having a tungsten bronze structure exhibiting a high Curie temperature, good insulating resistance and mechanical quality factor, and excellent piezoelectric properties is provided. The compound contains a tungsten bronze structure oxide represented by general formula (1): x(BaB2O6)-y(CaB2O6)-z{(Bi1/2C1/2)B2O6}  (1) where B represents at least one of Nb and Ta; C represents at least one of Na and K; x+y+z=1; x satisfies 0.2≦̸x≦̸0.85; y satisfies 0≦̸y≦̸0.5; and z satisfies 0z≦̸0.8.