| 摘要 |
PROBLEM TO BE SOLVED: To form a laminated electrode easily, prevent occurrence of crack on a piezoelectric substrate while an electric field is applied, and ease formation of terminal electrode, by winding a piezoelectric substrate and two electrodes spirally as a column, and exposing one end part of the electrodes on the end part of outer circumference thereof. SOLUTION: Electrodes 12a and 12b are inserted between piezoelectric substrates 11a and 11b, and the piezoelectric substrates 11a and 11b and electrodes 12a and 12b are wholely wound spirally, forming a columnar piezoelectric structural body 10. The electrode 12b is exposed over the outer circumference surface and the end part of the electrode 12a is exposed over the piezoelectric substrate 11b, and the end parts of the electrodes 12a and 12b are provided originally with the conventional mechanism of terminal electrode. Then the end parts of the electrodes 12a and 12b are connected with a power supply 15, so that an electric field can be applied. Single body of piezoelectric ceramic material having a piezoelectric property such as BaTiO3 , etc., or multicomponent-based piezoelectric ceramic material such as PZT, etc., is used for component material of the piezoelectric substrates 11a and 11b. |
