| 摘要 |
PROBLEM TO BE SOLVED: To provide a piezoelectric porcelain composition excellent in reflow heat resistance, while increasing a temp. stability of oscillation frequency and increasing a P/V value at the tertiary overtone. SOLUTION: In a perovskite type multiple oxide containing at least Pb, Fe, Sb, Mn, Ti, Sr and/or Ba as a metal element, when a composition formula by atomic ratio is expressed by (Pb1-x-y-z )p REx Sry Baz (Fe1/3 Sb2/3 )a Mnb Ti1-a-b O3 (RE is group IIIa element in periodic table), (x), (y), (z), (p), (a) and (b) satisfy 0.06<=x<=0.11, 0<=y<=0.10, 0<=z<=0.10, y+z<=0.12, 0.95<=p<=1.00, 0.01<=a<=0.04, 0.01<=b<=0.03. |
