Microsystems technologies for use in structures and integrated systems (2009)
Piezoceramics are considered as key functional material in micro systems and smart structure technology. Showing superior mechanical, dielectric, pyroelectric, ferroelectric and piezoelectric...
Modular bimorph mirrors for adaptive optics (2009)
Rodrigues, G., Bastaits, R., Roose, S., Stockman, Y., Gebhardt, S., Schönecker, A., ...
This paper examines the possibility of constructing deformable mirrors for adaptive optics with a large number of degrees of freedom from silicon wafers with bimorph piezoelectric actuation. The...
Piezokeramische Faser, Faserkomposite und LTCC-Module zur Integration in Leichtbaustrukturen (2009)
Scheithauer, U., Flössel, M., Uhlig, S., Schönecker, A., Gebhardt, S., Michaelis, A.
Robust LTCC/PZT sensor-actuator-module for aluminium die casting (2009)
Flossel, M., Scheithauer, U., Gebhardt, S., Schönecker, A., Michaelis, A.
The present paper reports on a new module design based on LTCC-PZT laminates. The assembly of modules is achieved by packaging of ceramic PZT plates between LTCC green layers and subsequent sintering...
Eigenschaften keramischer Ferroelektrika und deren Anwendungspotenzial (2008)
Dieser Beitrag betrachtet die Werkstoffgruppe der keramischen Ferroelektrika, die als Piezokeramik Anwendung in der Sensorik, Aktorik und Ultraschalltechnik finden und als Dielektrika die Basis für...
Piezoceramic actuators are characterized by the capability of large scale integration and very high reliability. In the sense of a mechatronic approach the implementation of a self-monitoring system...
Piezoelectric fiber composite fabrication (2008)
This chapter considers the status of piezoelectric fiber composite fabrication. The description is focused on three topics, the preparation of sol-gel derived PZT fiber/polymer composites as the...
Nuffer, J., Kohlrautz, D., Brückner, B., Schönecker, A., Michelis, P., Adarraga, O., ...
The reliability of adaptronic systems for active noise reduction is regarded as one of the key issues for entering mass markets. The paper gives an overview on the results obtained within the...
Piezoelektrische Generatoren für Low Power Wireless Technologies (2008)
Der direkte piezoelektrische Effekt (Generatoreffekt) ist seit über einem Jahrhundert bekannt und genau so alt ist die Idee diesen für die Bereitstellung von Elektroenergie zu nutzen. Seit über...
Active optical structures by use of PZT thick films (2008)
Gebhardt, S., Schönecker, A., Bruchmann, C., Beckert, E., Rodrigues, C., Bastaits, R., ...
Piezoceramic thick films offer the possibility of integrated solutions for microsystems applications. The authors have developed a screen printable thick film paste based on a low sintering PZT-PMN...
Untersuchungen zur Polarisierung piezoelektrischer Keramiken unter Mehrfeldbelastung (2008)
Das Gesamtkonzept des Transregio 39 PT-PIESA zielt auf die Herstellung adaptiver Verbundstrukturen, die in Großserie gefertigt werden sollen. Aus diesem Grund eignen sich auch nur piezokeramische...
Research and development of active flexural actuator modules based on PZT thick films (2008)
Flössel, M., Gebhardt, S., Schönecker, A.
In sensor and actuator technology plane piezoelectric modules are suited for an active mechanical control of thin-walled structure components e.g. bender (and flexural actuators respectively) and...
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...
Reliability investigation of piezoelectric macro fibre composite (MFC) actuators (2007)
Nuffer, J., Schönecker, A., Brückner, B., Kohlrautz, D., Michelis, P., Adarraga, O., ...
Multi-functional materials are the key to integrated sensor and actuator functions which enable adaptronic systems to intelligently react on varying forces and environment. The reliability of...
Efficiency potential of RGS silicon from current R&D production (2007)
Seren, S., Kaes, M., Hahn, G., Gutjahr, A., Burgers, A.R., Schönecker, A.
Development of functional ceramic films for nano- and microsystems (2007)
Schönecker, A., Gebhardt, S., Schlenkrich, F., Endler, I., Meissner, F., Michaelis, A., ...
Ceramic films gain more and more importance for the preparation of integrated functional components in planar design. The required film thickness depends on the design of the envisaged circuit or...
Schönecker, A., Gebhardt, S., Partsch, U.
WO 2009049613 A2 UPAB: 20090514 NOVELTY - The element has a sintered piezoelectric or electrostrictive component (2) completely surrounded by a low temperature co-fired ceramic (LTCC), where the...
Nicolai, M., Scholehwar, T., Schönecker, A.
The paper reports on our investigation of the interrelationships between ferroelectric phase composition (rhombohedral/morphotrop/tetragonal)and material performance for...
Nicolai, M., Scholehwar, T., Schönecker, A.
The paper reports on our investigation of the interrelationships between ferroelectric phase composition (rhombohedral/morphotrop/tetragonal)and material performance for...
Gebhardt, S., Kretzschmar, C., Schuh, C., Schönecker, A., Zapf, J.
DE 102007058875 A1 UPAB: 20090706 NOVELTY - The component (1) has a piezoelectric layer (14) arranged between electrode layers (12, 13) in a stacking direction (11), where the electrode layers extend...
Development of functional ceramic films for nano and microsystems technology (2006)
Schönecker, A., Gebhardt, S., Schlenkrich, F., Endler, I., Mayer-Uhma, T., Uhlig, S.
Ceramic films are considered as key functional material in nano and microsystems technology. IKTS has built the experimental basis for the development of functional films using screen printing, CSD,...
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...
Vibration control with adaptive structures: MAVO FASPAS project review (2006)
Hanselka, H., Melz, T., Sporn, D., Schönecker, A., Poigné, A.
The mission of the Fraunhofer Gesellschaft, one of the biggest research facilities in Germany, is to identify technologies with a high impact potential for commercial applications and to take all...
High throughput screening of ferroelectric thin film libraries (2006)
Schroeter, C., Wessler, B., Schönecker, A., Keitel, U., Eng, L.M.
High throughput methods can significantly speed up the search for advanced materials in a multidimensional configuration space, hence keeping innovation cycles short. In the search for improved...
Piezocomposite materials for smart system applications (2006)
Daue, T., Schönecker, A., Wilkie, W.K.
The concept of smart systems is based on intelligent materials, which are changing local mechanical properties on external stimulation. Due to the overall performance, piezo ceramics are considered...
Vollaktiver Piezoaktor und Verfahren zu seiner Herstellung (2006)
Brückner, B., Gebhardt, S., Radanielina, M., Schuh, C., Schönecker, A., Steinkopff, T.
DE 102006025362 A1 UPAB: 20080107 NOVELTY - The fully active piezo actuator (1) has multiple piezoelectric ceramic layers (10), with opposite sides of layers are perpendicular to a stack direction...
Bauweisen und Anwendungen von Piezokompositen in der Adaptronik (2005)
Multifunktionale Werkstoffe oder Werkstoffsysteme, die aktuatorische, sensorische und lasttragenden Eigenschaften auf sich vereinen, sind ein wesentlicher Bestandteil adaptiver Strukturen. Aufgrund...
Rödig, T., Schönecker, A., Hladky, A.
Further progress in ultrasonic technology is expected by using custom shape, high-quality, low-cost ultrasonic transducers. Therefore, 1-3 ultrasonic composites based on piezoceramic fibers have been...
The Fraunhofer MAVO FASPAS for smart system design (2005)
Melz, T., Matthias, M., Sporn, D., Schönecker, A., Poigné, A.
The Fraunhofer Gesellschaft is the largest organization for applied research in Europe, having a staff of some 12,700, predominantly qualified scientists and engineers, with an annual research budget...
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...
Piezoelektrische Energiequellen für low-power Elektronik (2004)
Röding, T., Schönecker, A., Daue, T., Esler, W.
Die Anwendungschancen piezoelektrischer Energiequellen wird aus der Sicht eines zu realisierenden Gesamtsystems analysiert. Wie für technische Generatoren gelten für piezoelektrische Generatoren...
Schönecker, A., Rödig, T., Keitel, U., Daue, T., Esler, W., Wierach, P.
The concept of smart structures is based on intelligent materials giving the means to react on external stimulation by changing local mechanical properties. The market needs a high degree of...
New approach to vibration control using piezo-ceramic elements (2004)
Brückner, B., Schönecker, A., Kaufmann, M., Bretthauer, G.
Many mechanical structures of mechatronic systems suffer from unwanted vibrations. The present paper concerns vibration control of a Euler- Bernoulli beam using piezo-ceramic actuators. The intention...
Quasistatic and dynamic properties of 1-3 composites made by soft molding (2003)
Gebhardt, S., Schönecker, A., Steinhausen, R., Seifert, W., Beige, H.
The development of the soft mold process allows for the preparation of fine scale 1-3 composites with PZT rods of different size, shape and spacing, which can be used as ultrasonic transducers for...
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...
ACE design: The beauty of rear contact solar cells (2002)
Schönecker, A., Roberts, S., Jooss, W., Ferrazza, F., Kerschaver, E. Von, Leistiko, O., ...
A new method for the determination of elastic properties of thin piezoelectric PZT fibers (2002)
Steinhausen, R., Hauke, T., Seifert, W., Beige, H., Lange, U., Sporn, D., ...
For the optimization of thin piezoelectric fibers it is necessary to determine their dielectric, elastic and piezoelectric properties. We developed analytical approximations to calculate the elastic...
Characterization and modeling of ferroelectric thin- films and 1-3 composites (2002)
Steinhausen, R., Hauke, T., Beige, H., Seifert, S., Lange, U., Sporn, D., ...
This contribution shows that the combination of experimental characterization and theoretical modeling is a powerful method for the further development and tailoring of smart materials. In a first...
Properties of fine scale piezoelectric PZT fibers with different Zr content (2001)
Steinhausen, R., Hauke, T., Beige, H., Watzka, W., Lange, U., Sporn, D., ...
Self-polarization and texture of wet chemically derived lead zirconate titanate thin films (2001)
Frey, J., Schlenkrich, F., Schönecker, A.
A multilayer structure of Si/SiO2/Ti/Pt/TiO2 was used as a bottom electrode for pyroelectric Pb(Zr0.25Ti0.75)O3 (PZT) thin films. A wet chemical approach was used for PZT deposition. The...
Investigation of interlayer phenomena in Ti/Pt electrodes for ferroelectric thin film devices (2001)
Frey, J., Schönecker, A., Schlenkrich, F., Thomas, J., Hermel, W.
The paper deals with the interrelations between prepn. and microstructure of a Si/SiO2/Ti/Pt/TiO2/Pb(Zr,Ti)O3 multilayer configuration. A wet chem. approach was used for Pb(Zr,Ti)O3 (PZT) deposition...
Energy backtransfer and infrared photoresponse in erbium-doped silicon p-n diodes (2000)
Hamelin, N., Kik, P.G., Suyver, J.F., Kikoin, K., Polman, A., Schönecker, A., ...
Temperature-dependent measurements of the photoluminescence (PL) intensity, PL lifetime, and infrared photocurrent, were performed on an erbium-implanted silicon p - n junction in order to...
Development of Encapsulated PZT-Patches for Adaptive Structures (2000)
Wierach, P., Goetting, H. C., Schönecker, A.
Thin monolithic piezoceramic plates (thickness 100µm and 200µm) represent one active material basis of the industrial research project Adaptronic in Germany. These plates are used as structural...
Fine scale 1-3 composites fabricated by the soft mold process: Preparation and modeling (2000)
Gebhardt, S., Schönecker, A., Steinhauser, R., Hauke, T., Seifert, W., Beige, H.
Preparation and modeling of fine-scaled 1-3 piezoelectric composites (2000)
Schönecker, A., Gebhardt, S., Seffner, L., Steinhausen, R., Hauke, T., Seifert, W., ...
Experimental study of texture and self-polarization of sol-gel derived PZT thin films (2000)
Frey, J., Schlenkrich, F., Schönecker, A., Obenaus, P., Thomas, J., Köhler, R.
Multifunktionale Leichtbauwerkstoffe auf der Basis von PZT-Folien (1999)
Die schnelle Entwicklung industrieller Produkte in Bereichen der Verkehrstechnik, des Maschinen- und Anlagenbaus, der Optik, der Medizintechnik und der Luft- und Raumfahrt stellt immer höhere...
Finescaled piezoelectric 1-3 composites: properties and modeling (1999)
Steinhausen, R., Hauke, T., Seifert, W., Beige, H., Watzka, W., Seifert, S., ...
Strukturkonform integrierbarer Funktionsmodule auf der Basis von PZT-Fasern (1999)
Pannkoke, K., Gesang, T., Clüver, M., Sporn, D., Schönecker, A.
Aktor aus Einzelelementen (1999)
Gesemann, H.J., Schönecker, A.
The linear actuator [5] is formed from a stack of laminates of piezoelectric or electrostrictive material to provide a large expansion. The height of the stack is limited by placing it on the surface...
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...
Neue piezoelektrische Verbundwerkstoffe für aktive und passive Anwendungen (1997)
Scholz, H., Watzka, W., Seifert, S., Glaubitt, W., Sporn, D., Schönecker, A., ...
Sporn, D., Watzka, W., Schönecker, A., Hanselka, H., Pannkoke, K.
Die strukturkonforme Integration von funktionellen Komponenten in lasttragende Bauteile ist ein Ziel der Ingenieurtechnik auf dem Gebiet der adaptiven Werkstoffe. Strukturkonformität heißt hier,...
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.
Sensoren, Aktoren auf der Basis eines Sol- Gel - Moduls (1996)
Otschik, P., Kluge, A., Grimme, R., Schönecker, A., Schumacher, A., Gesemann, H.J.
Sol-Fertigung nur inhouse, Entwicklung in Instituten. Erhöhung der Schichtdicke je Beschichtungszyklus. Prozeßvereinfachung durch photosensitive Sole, Auswahl der für das Belichten erforderlichen...
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...
Densification and properties of sol-gel-derived PZT fibers for 1-3 composites (1995)
Scholz, H., Sporn, D., Ullrich, A., Schönecker, A., Martin, W.
The microstructural evolution of sol-gel derived PZT- fibers is strongly dependent on the atmosphere and the T/t-schedule of drying, pyrolysis and sintering. The PbO-partial pressure during sintering...
PZT-film compositional development and physical properties (1994)
Schönecker, A., Merklein, S., Grond, W., Franke, K., Weihnacht, M., Gesemann, H.J.
The preparation-structure-property relationships on relatively thick (0.5-1.5myrn) polycrystalline PZT-films have been studied. The PZT-films were prepared by sol-gel processing from high molarity...
Meßtechnik für elektromechanische Wandler aus piezokeramischen Wekstoffen (1994)
Die Piezokeramik hat sich in mehr als 30 Jahren in viele Bereiche der Technik eingeführt. Vorliegendes Lehrbuch, basiert auf einem Lehrgang an der Technischen Akademie Esslingen für Wissenschaftler...
Measurement of complex permittivity in the microwave range (1994)
The present development concerns the determination of permittivity epsr (epsr bigger than 1 0) and dielectric loss factor tan delta of low loss dielectrics in the microwave range. Experiments are...
Low sintering PZT by liquid phase formation (1994)
Schönecker, A., Gesemann, H.J.
The present paper reports on a study to lower sintering temperature of PZT-PMN by transient liquid phase formation. The investigated basic mixture is high sintering with Ts =1240 degree. Ts reduction...
Schönecker, A., Gesemann, H.J.
Beschrieben werden die Eigenschaften von Hart- und Weich-PZT, insbesondere die großen Unterschiede im Polungsverhalten. Aus diesen Unterschieden resultieren verschiedene Eigenschaften von...
New X7 ceramic dielectric for multilayer capacitors: Vortrag auf IUMRS-ICAM '93. (1993)
Schönecker, A., Gesemann, H.J.
Ceramic capacitors are one of the basic components in electronics. Developed originally for military purposes, they have now found use in all areas of electronics, including home appliances and...
Low sintering PZT - materials by conventional powder processing (1993)
Schönecker, A., Gesemann, H.J.
The experimental procedure for lowering sintering temperature of PZT powders is described. The obtained piezoelectric data are discussed and valuated with respect to the demands of multilayer...
Schönecker, A., Otschik, P., Gesemann, H.J.
Within the Fraunhofer-Institute of Ceramic Technologies and Sintered Materials ceramic for electronic devices, as sensors, actuators, energy converters and passive components are developed and...
Merklein, S., Schönecker, A., Schubert, U., Sporn, D.
Ferroelectric PZT thin films were successfully prepared using an organometallic deposition procedure. The precursor sol with composition near the morphotropic phase boundary (Zr/Ti = 53/47) consisted...
New ceramic dielectrics for multilayer capacitors (1993)
Schönecker, A., Gesemann, H.J.
Temperature stability of type II dielectrics can be improved by using and tailoring multiphase materials with core- shell microstructure. Using a mixture of Bi-layer-structure oxide and...
Ferroelectric thin films in the system PZT (1993)
Merklein, S., Sporn, D., Schönecker, A.
A new one step deposition process for smooth and crackfree films with a thickness equal or bigger than 1 mym has been developed in the system Pb(Zr1-x Tix)O3 (PZT). The films showed device-worthy...
Merklein, S., Sporn, D., Schönecker, A.
A new one step deposition process for smooth and crackfree films with a thickness equal or bigger than 1 mym has been developed in the system Pb(Zr1-x Tix)O3 (PZT). Starting from lead acetate...
Ceramic materials for actuators - composition related properties (1993)
Schönecker, A., Gesemann, H.J.
Based on PZT and relaxor ferroelectrics, various low sintering actuator materials have been investigated. Their properties are discussed showing the different approaches for the development of...
During the past few years a great variety of multi-junction solar cells has been developed with the aim of a further increase in efficiency beyond the limits of single junction devices. To...
Progress in the measurement of multi-junction devices at ISE (1991)
Bücher, K., Heidler, K., Müller-Bierl, B., Schönecker, A.
The ISE calibration laboratory is extending its facilities to measure multi-junction devices. In this paper we discuss a new reference cell method with software pre-selection of the simulator setting...
In most set-ups used to measure the spectral response of large area solar cells, it is not very easy to get uniform monochromatic and bias illumination over the total area of the solar cell, so...
Ein auf der Basis eines Michelson Interferometers entwickeltes, lichtstarkes Fourierspektrometer wird vorgestellt. Das Ziel dieser Entwicklung ist, die spektrale Empfindlichkeit an Tandem-Solarzellen...
Spectral response measurements of large area solar cells with a filter monochromator system (1989)
Schönecker, A., Beier, J., Zastrow, A.
A computer controlled filter monochromator system (FMS) with 18 interference filters covering the spectral range from 350 nm to 1150 nm will be presented. The emphasis of the paper will be to dicuss...