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Electroceramic components, especially multilayer piezoelectric actuators

An electronic ceramic, multi-layer technology, applied in piezoelectric devices/electrostrictive devices, piezoelectric/electrostrictive/magnetostrictive devices, electrical components, etc.

Active Publication Date: 2022-02-11
VTESCO TECH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] A disadvantage of the structure described in DE 10 2008 048 051 A1 is that the very thin first layer can diffuse into the ceramic matrix due to the high temperatures that occur in the application of multilayer actuators

Method used

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  • Electroceramic components, especially multilayer piezoelectric actuators
  • Electroceramic components, especially multilayer piezoelectric actuators
  • Electroceramic components, especially multilayer piezoelectric actuators

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0030] figure 1 A schematic detailed view of a multilayer actuator 1 with a plurality of inner electrode layers 2 , 2 ′ and a plurality of piezoelectrically active layers 3 is shown. The multi-layer actuator 1 is used, for example, as an actuating element in an injection valve of a motor vehicle engine. The internal electrode layers 2 , 2 ′ and the piezoelectrically active layers 3 are stacked alternately one above the other in the stacking direction 4 and form a multilayer body 5 . The multilayer body 5 can be referred to as a material composite consisting of a ceramic matrix and internal electrodes in the form of internal electrode layers.

[0031] The internal electrode levels 2 each consist of an electrically conductive material, in particular a metal or an alloy such as silver-palladium (Ag—Pd), in a manner known to those skilled in the art. The piezoelectrically active layer 3 is made of a material which has a piezoelectric effect, ie the material deforms mechanically ...

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Abstract

The invention describes a component (1) having a ceramic matrix (5) and at least one internal electrode (2), which is arranged in the ceramic matrix (5) and on a first surface (7) exposed everywhere. Furthermore, the component according to the invention comprises at least one electrically conductive common contact (8) with the inner The electrodes (2) are electrically connected, and the insulating layer is arranged between the body (5) and the common contact (8), wherein the insulating layer (15) has at least one opening (16), and the at least one The opening exposes at least a portion of the internal electrode (2). Finally, the component has a further electrically conductive layer (19), which is arranged between the internal electrode (2) and the common contact (8) and between the insulating layer (15) and between the common contact parts (8). The component according to the invention is characterized in that the further layer ( 19 ) is designed as a multilayer layer ( 30 ) having at least two layers ( 30A, 30B), wherein the multilayer layer ( 30 ) comprises A current collector layer as a first layer (30A) and a diffusion barrier layer as a second layer (30B), the current collector layer adjoining the common contact (8), the diffusion barrier layer adjoining the insulating layer ( 15) and the inner electrode (2).

Description

technical field [0001] The invention relates to a component, in particular an electroceramic component such as a multilayer piezoelectric actuator. Background technique [0002] Electroceramic components such as piezoelectric actuators have a ceramic matrix with at least one internal electrode which is arranged in the ceramic body and is exposed at the surface. The piezo actuator can be constructed in the form of a multilayer piezo actuator with a plurality of piezoelectrically active (aktiv) ceramic layers and metallic inner electrode layers, which are connected to each other. Stack alternately. In a multilayer piezoelectric actuator, the surface has a plurality of strip-shaped metallic inner electrodes and piezoelectrically active ceramic regions. Such piezoelectric actuators are used, for example, as operating elements in injection valves of very different engine types in motor vehicles. [0003] Such multilayer actuators, which consist of layers of material layers and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L41/047H01L41/083H10N30/87H10N30/06H10N30/20H10N30/30H10N30/50H10N30/853
CPCH10N30/872H10N30/871H10N30/20H10N30/50
Inventor A.伦克J.豪博尔德C.赫格勒A.维尔德根C.朱姆斯特鲁尔S.赛费尔特
Owner VTESCO TECH GMBH