| 摘要 |
PROBLEM TO BE SOLVED: To obtain a piezoelectric porcelain composition applicable for driving at high vibration frequency. SOLUTION: Main component is expressed by a compositional formula aPbZrO3 -bPbTiO3 -cPb(Mn1/3 Nb2/3 )O3 (wherein a+b+c=1). The component range is on the line connecting the component points and in an area surrounded by these four component points which are W (a=0.35, b=0.60, c=0.05), X (a=0.60, b=0.35, c=0.05), Y (a=0.25, b=0.50, c=0.25) and Z (a=0.55, b=0.20, c=0.25). 0.1-0.5 wt.% La2 O3 is contained as a subsidiary component in 100 wt.% of the main component. |
