LEAD-FREE PIEZOCERAMIC MATERIAL OF THE POTASSIUM-S
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专利名称：LEAD-FREE PIEZOCERAMIC MATERIAL OF THE POTASSIUM-SODIUM-NIOBATE
SYSTEM DOPED WITH MANGANESE,
METHOD FOR PRODUCING A COMPONENT
COMPRISING THE PIEZOELECTRIC
MATERIAL AND USE OF SAID COMPONENT 发明人：BATHELT, ROBERT,BENKERT,
KATRIN,CARDIN, AURELIE,SCHUH, CARSTEN 申请号：EP2008062597
申请日：20080922
公开号：WO2009043746A3
公开日：
20091126
专利内容由知识产权出版社提供
摘要：The invention relates to a piezoceramic material, comprising a perovskite phase with NaNbO3 which is doped with manganese selected from the range of 0.02% by weight to 1.0% by weight. Preferably, said material contains, in addition to sodium, potassium as an additional alkali metal in a portion of 0.4 mole-% to 0.6 mole-%. With this composition, the system has a morphotropic phase boundary which results in excellent piezoelectric properties. The invention also relates to a method for producing a piezoceramic component using the piezoceramic material. Said method comprises the following steps: a) making available a green compact having a piezoceramic starting composition of the piezoceramic material and b) heat-treating said green compact, the piezoceramic material of the component being formed from the piezoceramic starting composition. The heat-treatment step comprises calcination and/or sintering of the
piezoceramic composition. The piezoceramic composition is e.g. an ultrasonic transducer or a piezoceramic bender transducer. The piezoceramic component is especially a multilayer piezoactuator which is used to control a fuel valve of an internal combustion engine of a motor vehicle.
申请人：SIEMENS AKTIENGESELLSCHAFT,BATHELT, ROBERT,BENKERT,
KATRIN,CARDIN, AURELIE,SCHUH, CARSTEN
代理人：SIEMENS AKTIENGESELLSCHAFT
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