Hard piezoelectric ceramic composition for multilayer piezoelectric transformers
AssigneeQorTek, Inc.
InventorsAhmet Erkan Gurdal, Sinan Dursun, Safakcan Tuncdemir, Clive Randall
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Abstract
A composition includes at least one Pb/Ni/Nb - Pb/Mg/W - Pb/Zr/Ti mixed oxide. A piezoelectric device may be made by providing at least two layers comprising the composition and coated with an outer electrode material; providing a plurality of layers comprising the composition and coated with an inner electrode material; combining or stacking a plurality of layers coated with inner electrode materials between two outer electrodes; and sintering or co-firing the inner electrode materials and outer electrode materials at a temperature at or below about 1000° C.
Claims21
A composition, comprising:
- a Pb/Ni/Nb - Pb/Mg/W - Pb/Zr/Ti mixed oxide;
- and
- 0.1 to about 0.5 wt.% MnO2, based on the weight of the composition.
A method of making a piezoelectric device, comprising:
- providing at least two first layers, each first layer coated with an outer electrode material;
- providing a plurality of second layers, each second layer coated with an inner electrode material;
- said at least two first layers and said plurality of second layers each comprising a Pb/Ni/Nb - Pb/Mg/W - Pb/Zr/Ti mixed oxide;
- combining or stacking a plurality of second layers coated with inner electrode materials between two first layers coated with outer electrodes;
- and
- sintering or co-firing the stacked inner electrode materials and outer electrode materials at a temperature at or below about 1000° C.
Dependencies are inferred from the claim text.