| 摘要 |
<p>PURPOSE:To increase the displacement quantity by improving the free movement level in the radial direction of an internal electrode layer and by making it easier to extend in the thickness direction of a piezoelectric plate. CONSTITUTION:A conductive paste contains alloy grains 3a with spindle shape, which consist of alloy compound of 80 to 95wt.% of basic metal and 5 to 15wt.% of added metal having higher melting point and higher rate of conductivity than those of the basic metal. The conductive paste is applied on one side of a piezoelectric plate 4 so that the alloy grains can be arranged in the thickness direction of the plate. Then, an internal electrode layer and the piezoelectric plate are integrated by baking a green sheet of the piezoelectric plate coated with the conductive paste. As holes 3b formed only in the radial direction of the internal electrode layer contributes to the free movement level of the internal electrode layer in the radial direction. Therefore, the piezoelectric plate also tends to shrink. As a result, the piezoelectric plate extends easily in the thickness direction, and the displacement quantity comes to increase.</p> |
