| 摘要 |
PURPOSE:To form a laminated piezoelectric substance with high efficiency of electrical pressure conversion, by providing in a high-molecular layer polarized ferroelectric substances in parallel to the thickness direction of the layer, forming electrodes on both surfaces of these compound piezoelectric substances, laminating them and forming electrical connection of alternative electrodes. CONSTITUTION:The ceramic plate with a thickness of 0.2mm is composed of titanic acid zirconic acid lead PZT in which 1wt%Nb2O3 is added to Pb(Ti0.48 Zr0.52)O3. It is sintered and polarized. Next, this ceramic plate is cut several 2mm-squared. Silicon rubber or PVDF which is synthetic organic-high molecular piezoelectric material is flown in the arranged squares so as to form a piezoelectric sheet 11 composed of compound piezoelectric material. Then, electrodes 12, 12 are formed on both surfaces of this piezoelectric sheet by Ni-plating, evaporizing, sputtering or the like. The given number of electrode-formed piezoelectric sheets are laminated and fixed by bonding or heat pressure welding. These electrodes 12, 12 are alternatively connected with external electrodes 13, 13 on both side surfaces of the laminated piezoelectric sheets. |
