| 简介 |
The invention relates to a piezoceramic composition of a calculated empirical formula Pb1-aREbAEc[ZrxTiy(NinMom)z]O3, wherein RE represents a rare earth metal having a rare earth metal content b, AE represents an alkaline earth metal having an alkaline earth metal content c, nickel is provided with a nickel content n.z, and molybdenum is provided with a molybdenum content m.z. Furthermore, the following correlations apply : a 0; m > 0; 0.1 = n/m = 5; x > 0; y > 0; z > 0, and x + y + z = 1. Also disclosed is a method for producing a piezoceramic component containing a piezoceramic material with the aid of the piezoceramic composition. Said method comprises the following steps : a) a green ceramic member containing the piezoceramic composition is supplied; and b) the green member is subjected to a thermal treatment such that the piezoceramic material of the component is produced from the piezoceramic composition. The thermal treatment encompasses calcining and/or sintering of the piezoceramic composition. The piezoceramic composition is compressed below 1000 °C, thus allowing metals melting at a lower temperature (e.g. silver or a silver-palladium alloy with a low palladium content) to be sintered along with the piezoceramic composition. The piezoceramic material is embodied as an ultrasonic transducer or a piezoceramic bending transducer, for example. The piezoceramic material is particularly configured as a multilayer piezo actuator which is used for triggering a fuel valve of an internal combustion engine in a motor vehicle. |
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