| 摘要 |
PROBLEM TO BE SOLVED: To provide a piezoelectric composition and a piezoresonator without generating phase transition distortion between resonant frequency and anti- resonant frequency and around their neighboring frequency, capable of making P/V large, excellent in temperature stability at an oscillating frequency in the temperature range between -20 deg.C to 80 deg.C capable of controlling characteristic fluctuation caused by baking dispersion. SOLUTION: A composition formula of the piezoelectric composition is expressed by mole ratio is Bi4Ti3O12.x(Sr1-aAa)TiO3 (x and a are 0.5<=x<=0.8, 0<=a<=0.8; and A contains a main ingredient satisfying at least one kind selected from among Ba, (Bi0.5Na0.5), (Bi0.5Li0.5) and (Bi0.5K0.5), and Mn of 0.05 to 1 pts.wt. in terms of MnO2 to the main ingredient of 100 pts.wt.). |
