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.
Actuators to be integrated in low temperature cofired ceramics (LTCC) microfluidic systems (2009)
Klumbies, H., Partsch, U., Goldberg, A., Gebhardt, S., Keitel, U., Neubert, H.
LTCC technology has recently been used for microfluidic elements, e.g. channels, cavities and other passive fluidic components. However, microfluidic systems having enhanced functionality, e.g....
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...
Fabrication and characterization of a monolithic piezoelectric actuator for fiber coupling (2008)
Bruchmann, C., Höfer, B., Schreiber, P., Eberhardt, R., Buss, W., Peschel, T., ...
PZT thick-films are printed on an Al2O3-substrate, generating a cantilever monomorph. A task of positioning with two degrees of freedom is successfully fulfilled. It is realized by two parallel...
Kerkweg, A., Jöckel, P., Warwick, N., Gebhardt, S., Brenninkmeijer, C.A.M., Lelieveld, J.
In this second part of a series of articles dedicated to a detailed analysis of bromine chemistry in the atmosphere we address one (out of two) dominant natural sources of reactive bromine. The two...
Methane emissions from the upwelling area off Mauritania (NW Africa) (2008)
Kock, A., Gebhardt, S., Bange, H. W.
Coastal upwelling regions have been indentified as sites of enhanced CH4 emissions to the atmosphere. The coastal upwelling area off Mauritania (NW Africa) is one of the most biologically productive...
Kerkweg, A., Jöckel, P., Warwick, N., Gebhardt, S., Brenninkmeijer, C.A.M., Lelieveld, J.
In this second part of a series of articles dedicated to a detailed analysis of bromine chemistry in the atmosphere we address one (out of two) dominant natural sources of reactive bromine. The two...
Methane emissions from the upwelling area off Mauritania (NW Africa) (2008)
Kock, A., Gebhardt, S., Bange, H. W.
Coastal upwelling regions have been indentified as sites of enhanced CH4 emissions to the atmosphere. The coastal upwelling area off Mauritania (NW Africa) is one of the most biologically productive...
Halogenated organic species over the tropical rainforest (2008)
Gebhardt, S., Colomb, A., Hofmann, R., Williams, J., Lelieveld, J.
Airborne measurements of the halogenated trace gases methyl chloride, methyl bromide and chloroform were conducted over the Atlantic Ocean and 1000 km of pristine tropical rainforest in Suriname and...
Halogenated organic species over the tropical rainforest (2008)
Gebhardt, S., Colomb, A., Hofmann, R., Williams, J., Lelieveld, J.
Airborne measurements of the halogenated trace gases methyl chloride, methyl bromide and chloroform were conducted over the Atlantic Ocean and 1000 km of pristine tropical rainforest in Suriname and...
Abiotic methyl bromide formation from vegetation, and its strong dependence on temperature (2008)
Wishkerman, A., Gebhardt, S., McRoberts, C. W., Hamilton, J. T. G., Williams, J., Keppler, F.
Halogenated organic species over the tropical South American rainforest (2008)
Gebhardt, S., Colomb, A., Hofmann, R., Williams, J., Lelieveld, J.
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...
Halogenated organic species over the tropical South American rainforest (2008)
S. Gebhardt, A. Colomb, R. Hofmann, J. Williams, J. Lelieveld
Airborne measurements of the halogenated trace gases methyl chloride, methyl bromide and chloroform were conducted over the Atlantic Ocean and about 1000 km of pristine tropical rainforest in...
A. Kerkweg, P. Jöckel, N. Warwick, S. Gebhardt, J. Lelieveld
In this second part of a series of articles dedicated to a detailed analysis of bromine chemistry in the atmosphere we address one (out of two) dominant natural sources of reactive bromine. The two...
Methane emissions from the upwelling area off Mauritania (NW Africa) (2008)
A. Kock, S. Gebhardt, H. W. Bange
Coastal upwelling regions have been identified as sites of enhanced CH<sub>4</sub> emissions to the atmosphere. The coastal upwelling area off Mauritania (NW Africa) is one of the most...
Methane emissions from the upwelling area off Mauritania (NW Africa) (2008)
A. Kock, S. Gebhardt, H. W. Bange
Coastal upwelling regions have been indentified as sites of enhanced CH<sub>4</sub> emissions to the atmosphere. The coastal upwelling area off Mauritania (NW Africa) is one of the most...
Halogenated organic species over the tropical rainforest (2008)
S. Gebhardt, A. Colomb, R. Hofmann, J. Williams, J. Lelieveld
Airborne measurements of the halogenated trace gases methyl chloride, methyl bromide and chloroform were conducted over the Atlantic Ocean and 1000 km of pristine tropical rainforest in Suriname and...
A. Kerkweg, P. Jöckel, N. Warwick, S. Gebhardt, J. Lelieveld
In this second part of a series of articles dedicated to a detailed analysis of bromine chemistry in the atmosphere we address one (out of two) dominant natural sources of reactive bromine. The two...
A. Kerkweg, P. Jöckel, N. Warwick, S. Gebhardt, J. Lelieveld
In this second part of a series of articles dedicated to a detailed analysis of bromine chemistry in the atmosphere we address one (out of two) dominant natural sources of reactive bromine. The two...
Entwicklung piezokeramischer Laminate und Fasern für die Integration in Leichtbaustrukturen (2008)
Flössel, M., Scheithauer, U., Gebhardt, S., Michaelis, A.
Gegenstand dieser Forschungsarbeit sind piezoelektrische Laminate und Fasern zur serientauglichen Fertigung adaptiver Strukturkomponenten. Die Piezolaminate sollen als Verbunde aus...
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...
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...
LTCC-based sensors for mechanical quantities (2007)
Partsch, U., Gebhardt, S., Arndt, D., Georgi, H., Neubert, H., Fleischer, D., ...
LTCC (Low Temperature Co fired Ceramic) is a ceramic multilayer technology for the manufacturing of highly integrated, reliable, high frequency suited, high temperature stable 3-D electronic...
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...
Application of PZT thick-films on adjusting purposes in micro-optical systems (2007)
Bruchmann, C., Höfer, B., Schreiber, P, Eberhardt, R., Buss, W., Peschel, T., ...
A PZT thick-film is printed on an Al2O3-Substrate, generating a cantilever monomorph. A task of positioning with two degrees of freedom is successfully fulfilled. It is realized by two parallel...
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...
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...
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...
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...
Hydroxylamine (NH2OH) in the Baltic Sea (2004)
S. Gebhardt, S. Walter, G. Nausch, H. W. Bange
The vertical distribution of dissolved hydroxylamine (NH2OH) was measured for the first time at 10 stations in the western, southern and central Baltic Sea during a cruise in February 2004. The...
Hydroxylamine (NH2OH) in the Baltic Sea (2004)
Gebhardt, S., Walter, S., Nausch, G., Bange, H. W.
The vertical distribution of dissolved hydroxylamine (NH2OH) was measured for the first time at 10 stations in the western, southern and central Baltic Sea during a cruise in February 2004. The...
Hydroxylamine (NH2OH) in the Baltic Sea (2004)
Gebhardt, S., Walter, S., Nausch, G., Bange, H. W.
The vertical distribution of dissolved hydroxylamine (NH2OH) was measured for the first time at 10 stations in the western, southern and central Baltic Sea during a cruise in February 2004. The...
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...
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., ...
Improved fabrication methods of 1-3 piezocomposites. (2001)
Lubitz, K., Schuh, C., Bauer, W., Emde, A., Gebhardt, S., Schoenecker, A.
25th Annual Internat.Conf.on Advanced Ceramics and Composites, Cocoa Beach, Fla., January 21-26, 2001
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.
Herstellung und Charakterisierung von feinskaligen 1-3 Piezokompositen für Ultraschallwandler (2000)
Preparation and modeling of fine-scaled 1-3 piezoelectric composites (2000)
Schönecker, A., Gebhardt, S., Seffner, L., Steinhausen, R., Hauke, T., Seifert, W., ...
Alm, B., Gesemann, H., Lenk, R., Richter, C., Schoenecker, A., Gebhardt, S.
DE 19826080 C UPAB: 20000209 NOVELTY - A filigree ceramic or powder metallurgical component is produced by casting a slip of specified viscosity in an evacuated elastic mold. DETAILED DESCRIPTION -...
Role of the progesterone receptor for paclitaxel resistance in primary breast cancer
Schmidt, M, Bremer, E, Hasenclever, D, Victor, A, Gehrmann, M, Steiner, E, ...
Paclitaxel plays an important role in the treatment of primary breast cancer. However, a substantial proportion of patients treated with paclitaxel does not appear to derive any benefit from this...