| 简介 |
The invention relates to a piezo-ceramic composition having a composition formula Pb [...] 1-a RE b AE c AL d [Zr x Ti y (Sc s W w ) z] O 3 . RE rare-earth metal portion b is a rare earth metal with a, AE a earth alkali metalalkali metal portionalkaline earth metal portion c and AL an alkali metal with a d with a. Scandium is present with a proportion of tungsten and tungsten with a. z scandium portion s. z w. Moreover, the following relationships : a 0 ; w > 0 ; 0.1 0 ; y > 0 ; z x + y + z = 1 and > 0. Secondly it is also a method for the production of a piezoceramic component with a piezoceramic material using the piezoceramic composition specified with the following process steps : a) providing a ceramic green body with the piezoceramic composition and b) heat treating the green body, wherein from the piezoceramic composition of the piezoceramic material of the component is created. The heat treating comprises a calcining and/or a sintering the piezoceramic composition. The piezoceramic composition compacted under 1000 °C. Therefore can metals, which melt at a low temperature (e.g., silver or a silver palladium alloy Low palladium portion ) are sintered together with the piezoceramic composition. The member is, for example, an ultrasonic transducer or a bending transducer. In particular is... |
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