| 摘要 |
A piezo-electric bending transducer is specified, which is suitable for installation in a valve channel. It consists of at least one ceramic layer, metallised on both sides, with piezo-electric characteristics, which is polarised such that it undergoes a length change when a voltage is applied, and of at least one stiff moulded piece, connected thereto over its surface, with approximately the same surface dimensions, which undergoes either no length expansion or opposite length expansion when a voltage is applied. The piezo-ceramic layer has a non-metallised point with a roughness Ra of less than 0.5 mu m, which covers an opening in the valve channel. …<??>The ceramic layer preferably has the form of an elongated strip and the non-metallised point is located at one end of the strip. …<IMAGE>… |
