Bipolar strain hysteresis of poled composites with Nd-Mn-doped PZT fibres (2009)
Pientschke, C., Kuvatov, A., Steinhausen, R., Beige, H., Krüger, R., Müller, T., ...
Nd-Mn-doped PZT fibres were produced using the sol-gel process. The PZT was doped with 2 mol% neodymium and an amount of 1.1 mol% or 0.75 mol% manganese. The fibres were investigated with respect to...
Simplified procedure for estimating epitaxy of La2Zr2O7-buffered NiW RABITS using XRD (2009)
Rikel, M.O., Isfort, D., Klein, M., Ehrenberg, J., Bock, J., Specht, E.D., ...
A procedure is developed for assessing the epitaxy of La2-xZr2+xO7 (LZO) layers on NiW RABITS. Comparing XRD patterns (theta-2 theta scans and 2D rocking curves) of LZO films of known thickness...
Poled composites with Nd-Mn-doped PZT fibers under bipolar electrical load (2009)
Pientschke, C., Steinhausen, R., Beige, H., Krüger, R., Müller, T., Sporn, D., ...
Using the sol-gel process, Nd-Mn-doped PZT fibers were produced. The PZT was doped with 2 mol% neodymium and 1.1 mol% manganese. For characterization, the fibers were embedded in a polymer. The...
Microstructure and ferroelectric properties of soft-doped sol-gel derived PZT/SKN fibers (2007)
Hansch, R., Braue, W., Seifert, S., Sporn, D., Müller, G.
Sol-gel derived PZT/SKN fibers with a final composition of 0.98(PbO)(1+z) (Zr0.53Ti0.47)O-2-0.02Sr(K0.25Nb0.75)O-3 and a PbO content of z = +0.04 and +0.14 in the spinning sol were sintered at...
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...
Piezoelektrischer Sensor und dessen Verwendung (2006)
Brunner, B., Sporn, D., Domann, G., Spies, P., Foerster, F., Gutierrez Boronat, J., ...
WO 2006084767 A1 UPAB: 20061018 NOVELTY - A piezoelectric sensor contains a support structure (1), and has at least one piezoelectric pickup, an amplifier circuit (3) and at least one terminal for...
Templated grain growth of lead zirconate titanate (2005)
Richter, T., Laurent, M., Schuh, C., Sporn, D., Krüger, R., Lissatschenko, G., ...
Jansen, M., Mueller, U., Clade, J., Sporn, D.
WO 200222624 A UPAB: 20020820 NOVELTY - New borosilane compounds (1) are claimed. DETAILED DESCRIPTION - New borosilane compounds of formula (1) are claimed. RxHal3-xSi-NH-BRyHal2-y (1) R = 1-20C...
Clade, J., Seider, E., Sporn, D., Brendler, E., Meinhold, D., Lange, T., ...
WO2005108470 A UPAB: 20051216 NOVELTY - Producing a polysilane-polycarbosilane copolymer solution comprises preparing a polysilane by disproportionating methylchlorodisilanes in the presence of a...
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...
Verfahren zur Abscheidung von Zirkonoxid-Schichten unter Verwendung von loeslichen Pulvern (2004)
Loebmann, P., Glaubitt, W., Sporn, D.
DE 19943789 A UPAB: 20010704 NOVELTY - Sol-gel process for the production of zirconium oxide layers comprises forming a soluble zirconium-containing powder forming a sol, coating a substrate with the...
Seifert, S., Sporn, D., Hauke, T., Müller, G., Beige, H.
This article reports about the dielectric and electromechanical properties of sol-gel derived ferroelectric PZT films on metallic substrates. PZT(53/47) films deposited directly on metallic...
Dutschke, A., Meinhardt, J., Sporn, D.
PZT thin films are commonly used for piezoelectric sensors and actuators. Some applications require a film thickness of a few micrometers, which can be achieved by using a sol-gel process with...
Oxidkeramische Faserverbundwerkstoffe und ihre Verwendung (2003)
Krell, A., Sporn, D., Blank, P.
WO2003045874 A UPAB: 20030703 NOVELTY - Oxide ceramic fiber composite material contains fibers of a single crystalline structure having an average coherence length of at least 150 mu m and has a...
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...
Hochtemperatur-Keramikfasern (2003)
Sporn, D., Clade, J., Spaniol, H., Jansen, M., Jäschke, B., Jäschke, T., ...
Processing of electroceramic fibers - precursors, processing and properties (2003)
Sporn, D., Helbig, J., Glaubitt, W., Spaniol, H., Vierhaus, P., Lange, U., ...
Sporn, D., Lange, U., Herborn, R.
WO2003093541 A UPAB: 20040102 NOVELTY - Fiber has a monocrystalline body consisting of ferroelectric material having a perovskite structure. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also...
Development and technology of doped sol-gel derived lead zirconate titanate fibers (2003)
Helbig, J., Glaubitt, W., Spaniol, H., Vierhaus, P., Lange, U., Hansch, R., ...
Piezoelectric PZT fibers were developed via the sol-gel route. These fibers are thin (about 30 mu m thick) and flexible and can be used for composites which can be adapted to curved geometries. A...
Sol-gel deposition processes of thin ceramic films (2002)
Sporn, D., Lobmann, P., Guntow, U., Glaubitt, W.
The development of inorganic functional thin films is driven by applications in electronics, solar technology, optics and other high- tech fields. A wide range of film compositions can be...
Powders, fibers, thin films and aerogels: Sol-gel-derived piezoelectric materials (2002)
Löbmann, P., Lange, U., Glaubitt, W., Hutter, F., Sporn, D.
Sol-gel processing allows the fabrication of high quality ceramic materials as powders, films, fibers and aerogels, which by other techniques is costly, difficult or even impossible. For...
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...
Mechanical and electric fatigue of PZT(53/47) films on metallic substrates (2001)
Hauke, T., Beige, H., Giersbach, M., Seifert, S., Sporn, D.
We have investigated the fatigue of electromechanical and dielectric properties of sol-gel derived PZT(53/47) thin films deposited on metallic substrates by means of electric and mechanical cycling....
Properties of fine scale piezoelectric PZT fibers with different Zr content (2001)
Steinhausen, R., Hauke, T., Beige, H., Watzka, W., Lange, U., Sporn, D., ...
Applications of periodically structured surfaces on glass (2000)
Wittwer, V., Gombert, A., Rose, K., Löbmann, P., Sporn, D., Manns, P., ...
High transmission float glass for solar applications (2000)
Glaubitt, W., Sporn, D., Hußmann, E., Gombert, A., Wittwer, V.
Diffractive optics for solar applications: An overview (1999)
Gombert, A., Rose, K., Bläsi, B., Heinzel, A., Boerner, V., Kübler, V., ...
Periodic surface-relief structures on large areas for optical applications (1999)
Bläsi, B., Boerner, V., Döll, W., Dreibholz, J., Gombert, A., Heinzel, A., ...
Subwavelength-structured antireflective surfaces on glass (1999)
Gombert, A., Glaubitt, W., Rose, K., Dreibholz, J., Bläsi, B., Zanke, C., ...
Thickness dependence of electromechanical properties of PZT thin films on metallic substrates (1999)
Antireflective transparent covers for solar devices (1999)
Gombert, A., Glaubitt, W., Rose, K., Dreibholz, J., Bläsi, B., Heinzel, A., ...
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.
Subwavelength-structured antireflective surfaces on glass (1999)
Gombert, A., Glaubitt, W., Rose, K., Dreibholz, J., Bläsi, B., Heinzel, A., ...
Anwendungen periodisch strukturierter Oberflächen auf Glas (1999)
Wittwer, V., Gombert, A., Rose, K., Löbmann, P., Sporn, D., Manns, P., ...
Subwavelength-structured antireflective surfaces on glass (1999)
Gombert, A., Gaubitt, W., Rose, K., Dreibholz, J., Bläsi, B., Heinzel, A., ...
Verfahren zur Beschichtung von Verstaerkungskomponenten fuer Verbundkeramiken (1999)
Loskot, S., Sporn, D., Glaubitt, W.
NOVELTY - A process for coating reinforcing components for ceramic composites comprises treating fibers, woven fabric or mats with a sol by means of a liquid coating method and then compacting the...
Keramische Fasern im System Silicium-Bor-Stickstoff-Kohlenstoff (1999)
Baldus, H., Perchenek, N., Thierauf, A., Herborn, R., Sporn, D.
DE 19530404 A UPAB: 19980819 The amorphous SiBN(C) ceramic fibres have a room temp. strength of more than 2.5 GPa, an elasticity modulus of more than 250 GPa and a creep parameter (standard BSR test,...
Water-based sols as source for glass coatings (1998)
Sporn, D., Glaubitt, W., Schulz, J., Gombert, A., Heinzel, A., Büttgenbach, L., ...
Glazing with very high solar transmittance (1998)
Gombert, A., Glaubitt, W., Rose, K., Dreibholz, J., Zanke, C., Bläsi, B., ...
Vom Mottenauge abgeschaut. Ultrafeine Strukturen für die Entspiegelung (1997)
Sporn, D., Wittwer, V., Gombert, A., Glaubitt, W., Rose, K.
Reflexionen an Glasoberflächen sind nicht nur störend, sondern mindern auch die Lichtausbeute. Mit extrem fein strukturierten Beschichtungen nach dem Vorbild des Mottenauges lassen sie sich in...
PZT-Piezokeramik aus Emulsionspulver (1997)
Hutter, F., Sporn, D., Kulig, M., Lubitz, K., Zychlinski, H. Von
PZT-piezoceramics derived form emulsion powders (1997)
Hutter, F., Sporn, D., Erny, T., Lubitz, K., Zychlinski, H. Von
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.
Emulsionspulver für Piezokeramik (1996)
Hutter, F., Sporn, D., Kulig, M., Lubitz, K., Zychlinski, H. Von
Development of microstructure of wet chemically derived PZT thin films (1996)
Wahl, S., Berger, A., Grond, W., Merklein, S., Seifert, S., Sporn, D.
YIG-fibers and thin films via sol-gel processing (1995)
Thierauf, A., Jahn, R., Merklein, S., Eßl, F., Sporn, D., Baier, M., ...
Verfahren und Mittel zur Herstellung von alpha-Al2O3 (1995)
Schmidt, H., Nass, R., Sporn, D., Brehler, K.P.
The invention relates to a process for the production of -Al2 and R->3 mean branched or unbranched alkyl or alkoxyl or hydrogen atoms respectively. The aluminium/ diketone complex compounds are...
Structural investigations on PZT precursors for thin-film preparation (1995)
Kolb, U., Abraham, I., Gutwerk, D., Ertel, T., Hörner, W., Bertagnolli, H., ...
Sol-Gel-Verfahren zur Herstellung keramischer Schichten. Stand und Perspektiven (1995)
Die Herstellung von keramischen Dünnschichten mit Schichtdicken < 1 Mikrometer aus stabilen Solen bietet eine Reihe von technologischen Vorteilen. Die Beherrschung von komplizierten Stöchiometrien...
Sol-Gel-Verfahren zur Herstellung amorpher und polykristalliner Langfasern (1995)
Glaubitt, W., Sporn, D., Jahn, R.
Pulverlose Methoden zur Herstellung spinnbarer Vorstufen der Systeme a-Al2o3, Mullit (3Al2O3 x 2Si=2), Spinell (MgAl2O4), Yttrium-Aluminium-Granat (Y3Al5O12 bzw. Al2=3 x Y3A5O12) und...
Si-B-(N,C). A new ceramic material for high performance applications (1995)
Passing, G., Sporn, D., Thierauf, A.
A new multinary, single phase (carbo-)nitride ceramic with outstanding properties has been developed. The "single-source" precursor Cl3Si-NH-BCl2 reacts with alkylamines to form a precerameric...
PZT-Piezokeramik aus Emulsionspulver (1995)
Hutter, F., Sporn, D., Kulig, M., Lubitz, K., Zychlinski, H. Von
Großmann, J., Rose, K., Sporn, D.
Nanostructured Ni-Y2O3/ZrO2 composites powders with up to 30 vol.-% of Ni have been synthesized by employing the sol-gel method. The complex formation between the Ni and Zr-precursor by different...
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...
Processing and properties of nanostructured Ni-ZrO2 functional cermets (1995)
Nanostructured metal - ceramic powders in the system NI -Y2O3/ZrO2 with 5-80 vol.-% of the metallic phase were produced by wet - chemical methods. These powders with a primary metal crystallite size...
Preparation and ferroelectric behaviour of PZT-fibres (1995)
Watzka, W., Sporn, D., Franke, K., Scholz, H.
Lead zirconate titanate fibres of the copmosition Pb(Zr0.53Ti0.47)O3 have been developed via the sol-gel route using a melt-spinning process. The spun PZT gel-fibres were treated thermally by a...
Powderless processing of ceramic fibers (1995)
Glaubitt, W., Jahn, R., Essl, F., Winter, V., Sporn, D.
Due to the unesthetic appearance, the toxicologigal problems of mercury and the galvanic corrision there is a need for a posterior dental filling material which is able to substitute the amalgam...
Herstellung von keramischen Dünnschichten über Sol-Gel-Verfahren (1995)
Merklein, S., Egner, T., Eßl, F., Grond, W., Schulz, J., Thierauf, A., ...
Anhand von Beispielen wird die Leistungsfähigkeit und Vielseitigkeit von naßchemischen Verfahren zur Herstellung keramischer Dünnschichten verdeutlicht. Es kann gezeigt werden, wie durch Kontrolle...
Herstellung von aktiven und passiven keramischen Dünnschichten über die Sol-Gel-Methode (1995)
Merklein, S., Jahn, R., Egner, T., Glaubitt, W., Thierauf, A., Schulz, J., ...
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...
Ceramic fibers from sol-gel precursors (1995)
Glaubitt, W., Sporn, D., Jahn, R.
Powderless methods for the preparation of continuously spinnable alumina, mullite, spinel, yttrium allumina garnet (YAG) and lead zirconium titanate (PZT) precursors are presented. The Al containing...
Sol-gel processing of functional and structural ceramic oxide fibers (1995)
Glaubitt, W., Watzka, W., Sporn, D.
Structural ceramic oxide fibers like alpha- Al-2-O-3, MgAl-2-O-4 (spinel) , Y-3-Al-5-O-12 (YAG) and eutetic Al-2-O-3-Y-3-Al-5-O-12 as well as the functional Pb(Zr-1-x-Ti-x)O-3 (PZT) fibers were...
Schmidt, H., Nass, R., Sporn, D., Brehler, K.P., Egger, C.
The invention relates to a process for the production of substrates coated with -Al2 and R->3 mean branched or unbranched alkyl or alkoxyl or hydrogen atoms respectively. The aluminium/ diketone...
Sol-Gel-Verfahren zur Herstellung von PZT-Fasermaterialien (1994)
Sporn, D., Glaubitt, W., Jahn, R., Elbe, F., Ullrich, A., Scholz, H.
Aus kommerziell verfügbaren Metallalkoholaten bzw. -carboxylaten wurde durch gezielte chemische Modifizierung ein neuartiges Verfahren zur Herstellung von PZT-Endlosfasern entwickelt. Danach...
Sol-gel processing of YIG-fibers and films (1994)
Eßl, F., Thierauf, A., Jahn, R., Sporn, D., Baier, M., Forchel, A.
A new way to spinnable sols derived from modified aluminium alkoxides (1994)
Glaubitt, W., Sporn, D., Jahn, R.
The preparation of spinnable sols has been developed to obtain a new type of sol-gel derived pure aluminia fiber. The starting material was aluminium sec-butoxide, which was modified in a first step...
Verfahren zur Herstellung von Bleizirkonattitanat-Endlosfasern (1993)
Glaubitt, W., Elbe, F., Jahn, R., Sporn, D.
Für innovative Anwendungen ferroelektrischer Komponenten in multifunktionellen Kompositwerkstoffen ("smart materials") wären Blei-Zikonattitanat (PZT)-Langfasern, die sensorische und aktuatorische...
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...
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...
Crystallization behaviour of freeze-dried YBa2 Cu3 O7-sigma powders at low temperatures (1992)
Thierauf, A., Sporn, D., Keck, K., Egger, C.
Sperconducting YBCO powders were produced via a freeze-drying process using the dissolved acetates as precursors. The 'soft' withdrawal of the solvent in the freeze-drying process in contrast to...
Superconducting YBa2Cu3O7-x thick films by sol-gel processing (1991)
Sporn, D., Birkhahn, M., Thierauf, A., Egger, C.
A discription of the preparation of superconducting YBa2 Cu3 O7-x thick films (thicknesses 10 to 30 micrometre) by a cemical method (sol-gel technique) is given Ag- or MgO-substrates were coated in...
Teilchenfoermige Polykondensate, Verfahren zu deren Herstellung und deren Verwendung (1990)
Schmidt, H., Nass, R., Sporn, D.
Teilchenfoermige Polykondensate werden ueber den Sol-Gel-Prozess dadurch hergestellt, dass eine Sol-Gel-Reaktion (Polykondensation) mindestens einer ein anorganisches Netzwerk bildenden Verbindung in...
Film preparation by inorganic-organic sol-gel synthesis (1988)
Schmidt, H., Rinn, G., Naß, R., Sporn, D.
Film formation by sol-gel techniques is an advantageous method to abtain inorganic coatings. The sol-gel process allows the preparation of prepolymers with suitable viscosities to use various coating...
Chemistry of preparation of ceramic powders by sol-gel techniques (1988)
Naß, R., Sporn, D., Ray, S., Schmidt, H.
The sol-gel technique is a unique method for tailoring ceramic powders if the different reaction parameters can be controlled with respect to the powder properties. Reaction control can be achieved...