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US 8,274,199 B2Granted
Piezoelectric multilayer component having a disturbance material and method of forming same
AssigneeEpcos AG
InventorsGeorg Kuegerl, Oliver Dernovsek, Alexander Glazunov
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Abstract
A piezoelectric multilayer component includes a stack of piezoceramic layers, which are arranged one on top of the other, and electrode layers. The stack has a first area and a second area. The second area contains a disturbance material, which is used to make the second area less mechanically robust than the first area.
Claims26
A piezoelectric multilayer component, comprising:
- a stack of green piezoceramic layers arranged one on top of the other;
- electrode layers located between the piezoceramic layers;
- and
- a disturbance material disposed in places in the stack, the disturbance material being suitable for diffusing from the places in the stack into a second area of the stack when the stack is heated and changing a sintering behavior of material in a second area of the stack so as to make the second area mechanically weaker than a first area of the stack.
1 more element
A method for producing a piezoelectric multilayer component, the method comprising:
- providing an intermediate product that comprises a stack of green piezoceramic layers arranged one on top of the other and electrode layers located between the piezoceramic layers, the intermediate product further including a disturbance material disposed in the stack;
- and
- sintering the intermediate product so that the disturbance material diffuses into a second area of the stack, wherein, during the sintering, the disturbance material changes the sintering behavior of the material in the second area of the stack so as to make the second area mechanically weaker than a first area of the stack.
A method of producing a piezoelectric multilayer component, the method comprising:
- arranging a stack of green piezoceramic layers one on top of the other;
- arranging electrode layers between the piezoceramic layers;
- disposing a disturbance material in places in the stack;
- and
- heating the stack of piezoceramic layers and electrode layers such that the disturbance material diffuses into a second area of the stack causing the second area to be mechanically weaker than a first area of the stack.
2 more elements
Dependencies are inferred from the claim text.