Piezoelectric ceramic and piezoelectric ceramic element comprising the same

摘要

In a piezoelectric ceramic containing a bismuth layer compound containing Ca, Bi, Ti, and O, as a main component, the molar ratio of Ca to Bi to Ti in the bismuth layer compound, which is the main component, is represented by a:b:c and formulas 0.15<=a/c<0.25 and 3.5<=(2a+3b)/c<=3.88 are satisfied.