Siemens Aktiengesellschaft

Epcos Ag

Kyocera Corporation

Continental Automotive Gmbh

Tdk Electronics Ag

Caterpillar Inc.

Bernhard Döllgast

Carsten Schuh

Thomas Feichtinger

Markus Puff

Harald Johannes Kastl

Masahiro Inagaki

Atsushi Ochi

Takami Sakamoto

Pavol Kudela

Claus Zumstrull

Michael Weilguni

Horst Gilg

Jörg Haubold

Franz Rinner

Frank Werner

Robert Hoffmann

Alexander Glazunov

Markus Koini

Marion Ottlinger

Oliver Dernovsek

Michael Schossmann

Günter Engel

Georg Kügerl

Emanuel Sanftleben

Jürgen Konrad

Stefan Obermair

Wolfgang Athenstaedt

Johann Schmidt

Denis Orosel

Marlene Fritz

Roland Niefanger

Kord Witte

Marko Adam

In an embodiment a method includes applying an AC voltage to an input region, converting, by the input region, the AC voltage into a mechanical oscillation, converting, by an output region, the mechanical oscillation into an electrical voltage and igniting a plasma at an output-side end side of an piezoelectric transformer, wherein the piezoelectric transformer includes the input region and the output region, wherein the piezoelectric transformer includes a longest edge and a shortest edge, and wherein the longest edge has a length that is twenty times a length of the shortest edge or less.

Piezoelectric transformer

A hard lead zirconate titanate (PZT) ceramic has an ABOstructure with A sites and B sites. The PZT ceramic is doped with Mn and with Nb on the B sites and the ratio Nb/Mn is &#x3c;2. A piezoelectric multilayer component having such a PZT ceramic and also a method for producing a piezoelectric multilayer component are also disclosed.

Hard PZT ceramic, piezoelectric multilayer component and method for producing a piezoelectric multilayer component

A piezoelectric transformer and a method for producing a piezoelectric transformer are disclosed. In an embodiment, the method includes manufacturing a main body having an input region having electrodes and a first piezoelectric material being alternately stacked one on top of the other. An output region includes a second piezoelectric material. The first piezoelectric material is polarized and a removable contact is fitted to an output-side end side of the main body, which end side faces away from the input region. A first electrical potential is applied to the removable contact for polarizing the second piezoelectric material.

Method for producing a piezoelectric transformer and piezoelectric transformer

A piezoelectric transformer is disclosed In an embodiment a piezoelectric transformer includes a cylindrical base body with an input region and an output region, wherein a cylinder axis of the base body extends in a longitudinal direction, wherein the input region is configured to convert an AC voltage into a mechanical vibration, wherein the output region is configured to convert a mechanical vibration into an electrical voltage, wherein the output region includes a single piezoelectric layer polarized in the longitudinal direction, wherein, in the input region, a first piezoelectric layer, on which a first internal electrode is arranged, and a second piezoelectric layer, on which a second internal electrode is arranged, are wound onto one another, and wherein the first piezoelectric layer and the second piezoelectric layer are polarized in a radial direction which is perpendicular to the longitudinal direction.

An arrester comprising a plurality of layers arranged one above another and comprising a cavity is specified, wherein the cavity extends through at least two of the layers and wherein electrodes adjoining the cavity are arranged between said two layers. Furthermore, a method for manufacturing an arrester is specified.

Arrester and method for manufacturing an arrester

An arrester and a method for producing an arrester are disclosed. In an embodiment the method includes providing at least three green layers, wherein each layer includes at least one green sheet, introducing at least one hole into a first layer and applying an electrically conductive material for forming inner electrodes to a second layer and a third layer. The method further includes laminating the layers to form a green stack, wherein the first layer is arranged between the second layer and the third layer, separating the green stack into individual components and compacting the individual components, wherein laminating the layers and compacting the individual components are effected in a single temperature process by co-firing.

Method for producing an arrester, and arrester

Provision is made of a method for producing a piezoelectric multilayer component (), in which piezoelectric green sheets, at least one ply () containing an auxiliary material having a first and a second component and layers () containing electrode material are arranged one above another alternately and sintered, wherein, during the sintering, the first and second components of the auxiliary material chemically react, and the at least one ply () containing the auxiliary material is degraded. In addition, provision is made of a piezoelectric multilayer component () comprising a plurality of alternating layers of electrode material () and piezoelectric ceramic and at least one layer () of auxiliary material having a breaking load which is reduced compared to the other layers of electrode material, wherein, in addition to the first and second components, the auxiliary material comprises a fifth component, which, at the preferred sintering temperatures for the piezoelectric material, in particular at most 1050&#xb0; C., at most has a negligible sintering activity and does not react with the piezoelectric material used. Finally, the use of ZrO, BaTiOor a mixture thereof in the auxiliary material layer of a piezoelectric multilayer component for reducing the breaking stress is described.

Method for producing a piezoelectric multilayer component, piezoelectric multilayer component containing an auxiliary material, and use of an auxiliary material for setting the breaking stress of a piezoelectric multilayer component

A multi-layer capacitor has dielectric layers and electrode layers arranged therebetween. The multi-layer capacitor has a number of segments that are connected to one another. At least one relief region is provided between the segments. The invention furthermore provides a method for producing such a multi-layer capacitor.

Multi-layer capacitor and method for producing a multi-layer capacitor

A piezoceramic multilayer actuator has a first sub-stack () with a plurality of piezoceramic layers () and at least one internal electrode (), the piezoceramic layers () and the at least one internal electrode () being laminated in an alternating manner, a second sub-stack () has a plurality of piezoceramic layers () and at least one internal electrode (), the piezoceramic layers () and the at least one internal electrode () being laminated in an alternating manner, and a connection layer () arranged between the first sub-stack () and the second sub-stack (), wherein the connection layer () is set up by a multitude of single connection points or connection lines () or other connection regions.

Piezoceramic multilayer actuator with high reliability

A production method for a contact mat for electrical contacting of an actuator uses a contact mat roll including (a) a plurality of terminal posts spaced apart from each other and extending in a first direction and (b) a plurality of electrically-conductive wires extending parallel to each other in a second, perpendicular direction, such that each wire extends across the terminal posts. The method includes unwinding the contact mat roll; connecting the wires to a metallization strip of an actuator; separating the wires at a location between adjacent terminal posts in the mat, such that a contact mat, including a single terminal post and the wires extending from the metallization strip to the terminal post, is connected to the actuator; and winding a free end of the contact mat including the terminal post at least partially around the actuator and securing the terminal post in position.

Production method of contact mat for an actuator

A piezoceramic multilayer actuator () includes a plurality of green layers, wherein the green layers are to be converted to piezoceramic layers () with a piezoceramic material in a subsequent step of heating. A security layer material mixture with a second material () and particles () embedded in the second material () is provided, wherein the particles () have a third material different from the first material and different from the second material (). The security layer material mixture is laminated between two piezoceramic layers (), thereby forming a green stack. The green stack is heated to a sintering temperature, wherein the green layers are converted to the piezoceramic layers (), and wherein a chemical reaction of the third material degrades the mechanical connection of the piezoceramic layers () by the security layer ().

Piezoceramic multilayer actuator and method of manufacturing a piezoceramic multilayer actuator

A piezoceramic multilayer actuator () has a plurality of piezoceramic layers (), a security layer () and a plurality of inner electrodes (). The piezoceramic layers () has a piezoceramic first material sintered at a sintering temperature. The security layer () has a second material and is disposed between two piezoceramic layers (). Each of the plurality of inner electrodes () has a third material and is deposited between two piezoceramic layers (). The degree of sintering of the second material is lower than the degree of sintering of the third material.

Piezoceramic multilayer actuator manufactured according to particular sintering parameters and corresponding method of manufacturing

A piezoceramic multilayer actuator () has a plurality of piezoceramic layers () and a security layer () disposed between two piezoceramic layers (). The piezoceramic layers () have a piezoceramic first material sintered at a sintering temperature. The security layer () has a second material () and particles () at least partially embedded in the second material (). The particles () have a third material different from the first material and different from the second material (). An adhesion between the third material and the first material is weaker than an adhesion between the second material () and the first material.

A contact mat () for electrically contacting an actuator, particularly a piezo actuator for an injector of an injection system has several electrically conductive wires () that are placed next to each other and several mechanical transversal connections located between the individual wires (). The transversal connections consist of one respective terminal post (-) of the actuator.

Contact mat for an actuator, and associated production method

In a method and device for polarizing a piezoelectric actuator according to which high-frequency pulse voltages can be used for polarizing the actuators an actuator to be polarized is mounted between two retaining elements while connected in series to a second piezoelectric actuator. The retaining elements provide the actuator () with a desired pretension. A compensating element compensates for changes in length of the actuator () so that even in the event of high-frequency pulse voltages and thus high-frequency changes in length, the pretension can be maintained within a desired range of values. Preferably, the second piezoelectric actuator has the identical design of the first actuator and is polarized with the first actuator. This enables two piezoelectric actuators to be simultaneously polarized during a polarizing process.

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Deutschlandsberg, Austria

Bernhard Döllgast