| abstract |
A piezoelectric composition d 33 is large is provided. A piezoelectric composition includes a plurality of crystal particles, the piezoelectric composition contains bismuth, iron, barium, titanium, and oxygen, and the crystal particles cover the core and the core. The average value of the bismuth content in the core 6 is expressed as C CORE mass%, the average value of the bismuth content in the shell 8 is expressed as C SHELL mass%, and C CORE is The number of all particles contained in the piezoelectric composition 2 is smaller than C SHELL, N, the number of crystal particles 4 including the core 6 and the shell 8 is represented as n, and n / N is 0. 10-1.00. [Selection] Figure 3 |