| 摘要 |
An oxide piezoelectric material composed of (Pb1-xCax) [(Li1/4 Fe1/4 W1/2) 0.02Ti0.98 O3 + Y mol% MnO [= 0.15-0.25; y= 1-2 is produced by (a) mixing a raw oxide powder of PbO, TiO2, CaCO3, WO3, LiCO3 and Fe2O3 by the ball-mill, (b) firing the mixt. at 850 deg.C and 950 deg.C for 4hr, (c) pressure-molding the fired powder and a binder at 1 ton/cm2, (d) calcining the molded material at 1060-1100 deg.C for 1hr, (e) forming an electrode on the both sides of the calcined material, and (f) polarizing it. The piezoelectric material is useful as a material for piezoelectric devices in the high frequency region.
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