New modular piezo actuator with built-in stress-strain transformation (2009)
Kunze, H., Schönecker, A.J., Seffner, L., Rödig, T.
As known, the electrical induced strain of conventional piezoceramic materials is limited by 0.12 % (2 kV/mm), which often requires strain transformation designs, like levers, in order to meet...
Verfahren zur Herstellung eines piezoelektrischen Wandlers (2007)
Seffner, L., Schoenecker, A., Gebhardt, S.
WO 200135468 A UPAB: 20010719 NOVELTY - The manufacturing method has piezoelectric fibres (2) or fibre pieces covered by a liquid polymer material, so that their longitudinal axes are aligned with a...
PZT thick films for sensor and actuator applications (2007)
Gebhardt, S., Seffner, L., Schlenkrich, F., Schönecker, A.
PZT thick films with thicknesses between 5 and 150 mu m are of great interest for microsystems applications where direct coating onto microelectronic substrates and high electromechanical performance...
PZT thick films for microsystems applications (2006)
Gebhardt, S., Seffner, L., Schlenkrich, F., Schönecker, A.
The preparation of PZT thick films on various substrates with thicknesses between 5 micron and 150 micron has been an area of active research for the last 15 years. Sintering of such films is...
Low Profile Piezoceramic Actuators For Smart Structures (2005)
Schonecker, A., Seffner, L., Rodig, T., Keitel, U., Daue, T.
The concept of smart structures is based on intelligent constitutive materials giving the means to react on external stimulation by changing local mechanical properties. The market needs a high...
Bi-layered PZT films by combining thick and thin film technology (2004)
Gebhardt, S., Seffner, L., Schönecker, A., Rödel, J., Beckert, W., Kreher, W., ...
PZT thick films on various substrates are of great interest for applications as pressure sensors, micropumps, ultrasonic and pyroelectric transducers, deformable mirrors and ferroelectric printing...
Elektromechanischer Wandler und Verfahren zur Herstellung (2003)
Sporn, D., Watzka, W., Schoenecker, A., Seffner, L.
WO 200002265 A UPAB: 20000313 NOVELTY - Electromechanical converter has at least one elongated piezoelectric fibre (1) and at least two electrodes (2) at separate points on the fibre to subject the...
Verfahren zur Herstellung von Dickschichten aus ferroelektrischen Keramiken (2003)
Schlenkrich, F., Seffner, L., Gesemann, H., Schoenecker, A.
DE 19817482 A UPAB: 19991215 NOVELTY - Thick ferroelectric ceramic layers are produced by applying a pure organometallic sol-gel solution, heating, applying a ferroelectric ceramic powder dispersion...
Piezoelectric fibers and composites for smart structures (2003)
Schönecker, A., Seffner, L., Gebhardt, S., Beckert, W.
This paper describes advanced and cost-efficient manufg. of piezoceramic fibers, piezoelec. composite materials made thereof and intended applications in the field of smart structures, health...
Preparation and modeling of fine-scaled 1-3 piezoelectric composites (2000)
Schönecker, A., Gebhardt, S., Seffner, L., Steinhausen, R., Hauke, T., Seifert, W., ...
Piezokeramischer Resonator (1999)
Gesemann, H.J., Schoenecker, A., Seffner, L.
The piezoceramic resonator uses a thick oscillation. A PZT layer is arranged on a carrier with a ground electrode using a sintering process at less than or equal to 950 degrees centigrade. A cover...
Verfahren zur Herstellung von Keramik-Polymer-Verbunden (1998)
Seffner, L., Gesemann, H.J., Schönecker, A.
In a process for manufacturing a ceramic polymer composite sintered ceramic components are placed in a mould cavity, polymer is added to fill the cavity and the mould contents compressed. The polymer...
Piezoelektrischer Aktor mit veraenderbarer Steifigkeit (1998)
Gesemann, H.J., Schoenecker, A., Seffner, L.
A piezoelectric actuator of variable rigidity consists of one or more adjacent or overlying individual elements, each comprising a multilayer contractor (3) with alternate side parallel-connected...
Gesemann, H.J., Seffner, L., Schoenecker, A., Schlenkrich, F.
A novel ferroelectric ceramic material comprises a ceramic perovskite solid soln. contg. one or more group 1 and 2 components, the group 1 components being: PbTiO3 (PT), BaTiO3 (BT), Pb(Fe1/2Nb1/2)O3...
Gesemann, H.J., Seffner, L., Voelker, K.
The invention relates to the fields of ceramics and thick film technology and refers to a PZT ceramic having a low sintering temperature, as can occur, for example, for compound layers for the...
Neue piezoelektrische Verbundwerkstoffe für aktive und passive Anwendungen (1997)
Scholz, H., Watzka, W., Seifert, S., Glaubitt, W., Sporn, D., Schönecker, A., ...
Grossflaechige piezokeramische Bauelemente (1997)
Gesemann, H.J., Schoenecker, A., Seffner, L., Keitel, U.
A large area piezoceramic component has a more than 5 (pref. 20-150) microns thick piezoceramic layer which has been densely sintered at at most 950 deg. C on a support with a base electrode and...
Dielectric and ferroelectric properties of 1-3 composites containing thin PZT-fibers (1997)
Watzka, W., Seifert, S., Scholz, H., Sporn, D., Schönecker, A., Seffner, L.
PZT-Dickschicht und Verfahren zu deren Herstellung (1996)
Schoenecker, A., Seffner, L., Gesemann, H.J.
The invention relates to the fields of electrical engineering and electronics, and refers to PZT thick films with resistance gradients which, for example, can be applied to resonators, and a process...
Low-sintering PZT-ceramics for advanced actuators (1996)
Schoenecker, A., Gesemann, H.J., Seffner, L.
Much effort has been made to reduce sintering temperature Ts of PZT powders, driven by the demands of multilayer actuator fabrication.Suppression of PbO-evaporation and usability of cost effective...
Verfahren zur Herstellung von PZT-Schichten aus niedrig sinterndem PZT-Pulver (1995)
Seffner, L., Gesemann, H.J., Voelker, K.
The invention refers to the fields of electrical engineering and electronics and relates to a process for producing PZT coatings as required by piezo-electrical components, for example. The task of...
Processing and properties of PZT-fibers for 1-3 composites (1995)
Scholz, H., Watzka, W., Sporn, D., Seffner, L., Schönecker, A.
Sol-gel derived PZT-fibers were prepared by the melt spinning method. The fiber diameter was adjusted in the range of 5 to 50 mu m. As-spun gel fibers were dried. pyrolyzed and sintered in controlled...
Verfahren zur Herstellung von PZT-Schichten (1994)
Gesemann, H.J., Seffner, L., Voelker, K.
The invention relates to the field of machine engineering and thick-film technology and relates to a process for the production of PZT coatings as applied in the coating of rollers. The invention is...
Preparation and Application of PZT thick film (1994)
Preparation technology and ferroelectric properties of 100-150mym PZT thick films on alumina substrates (20sqcm) are reported. Thick films prepared have a remanent polarization of 10-15myC/sqcm and a...
Herstellung und Eigenschaften von PZT-Dickschichten (1994)
Seffner, L., Fischer, K., Häßler, W., Gesemann, H.J.
Die Herstellung von piezoelektrischen Schichten auf keramischen Trägem unter Anwendung der Dickschichttechnologie ist mit den kommerziell verfügbaren Piezowerkstoffen auf PZT-Basis nicht möglich,...
Mixtures of ferroelectric and paraelectric materials offer the possibility to develop materials with temperature directed coefficient of capacity as used in ceramic multilayer capacitors of type1....
Herstellung ferroelektrischer Dickschichten: Poster. (1992)
Müller, F., Häßler, F., Seffner, L.
Doctor blade technique, tape casting process and plasma spraying combined with subsequent heat treatment are used to produce ferroelectric PZT- layers with a thickness of (100...200)Mym on metallic...