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    NachhaltigAngewandte Naturwissenschaften und WirtschaftsingenieurwesenIPH Teisnach

    Beitrag (Sammelband oder Tagungsband)

    Christian J. Trum, M. Jung, Beate Schmidbauer, Sebastian Sitzberger, E. Willenborg, Rolf Rascher

    Hybrid-process-chain for polishing optical glass lenses – HyoptO

    Proceedings of SPIE Optical Engineering + Applications (24 August - 04 September, 20208; Optical Manufacturing and Testing XIII; online conference), San Diego, United States, vol. 11487

    DOI: 10.1117/12.2568400

    Abstract anzeigen

    A number of process steps that build on one another are required to manufacture optical components from glass. The polishing steps are the most time-consuming and therefore cost-intensive parts of the process chain. Low removal rates and the depth of the Sub Surface Damage (SSD) to be removed contribute to this. An alternative for the complete removal of the SSD-penetrated material using contactless polishing methods such as Ion Beam Figuring (IBF) is the healing of the SSD. Due to the induced energy during laser-polishing, the material is remelted at the defects and the SSD are closed. However, laser-polishing is also associated with disadvantages in terms of shape accuracy and surface quality. The project HyoptO is therefore devoted to the development of a hybrid-process-chain consisting of laser processing and conventional polishing. It is expected that the healing times of the SSD can significantly reduce the process times in the subsequent polishing steps. However, there are a few questions to be answered regarding the economic use of the hybrid-process-chain. These include:

    NachhaltigAngewandte Naturwissenschaften und WirtschaftsingenieurwesenIPH Teisnach

    Vortrag

    Christian J. Trum, M. Zäh, Rolf Rascher

    Steigerung der Effizienz chemisch-mechanischer Polierprozesse durch eine systematische Auswahl und Anpassung von Poliersuspension und Poliermittelträger

    3. Ko-op Symposium, Garching

    NachhaltigAngewandte Naturwissenschaften und WirtschaftsingenieurwesenIPH Teisnach

    Vortrag

    Christian J. Trum, Rolf Rascher, M. Zäh

    Steigerung der Effizienz chemisch-mechanischer Polierprozesse durch eine systematische Auswahl und Anpassung von Poliersuspension und Poliermittelträger

    2. Ko-op Symposium, Garching

    NachhaltigAngewandte Naturwissenschaften und WirtschaftsingenieurwesenIPH Teisnach

    Vortrag

    Christian J. Trum, Rolf Rascher, M. Zäh

    Steigerung der Effizienz chemisch-mechanischer Polierprozesse durch Anpassung der Poliersuspension

    1. Ko-op Symposium, Garching

    NachhaltigAngewandte Naturwissenschaften und WirtschaftsingenieurwesenIPH Teisnach

    Vortrag

    Christian J. Trum

    Charakterisierung chemisch-mechanischer Polierprozesse für optische Gläser

    10. Wetzlarer Herbsttagung "Moderne Optikfertigung", Wetzlar

    NachhaltigAngewandte Naturwissenschaften und WirtschaftsingenieurwesenIPH Teisnach

    Vortrag

    M. Jung, Christian J. Trum, Rolf Rascher

    Hybrid Process Chain for Polishing of Optics Made from Glass

    LaP 2020 - 4th Conference on Laser Polishing, Aachen (video conference)

    NachhaltigEuropan Campus Rottal-Inn

    Zeitschriftenartikel

    Janina Beduhn

    Die neue GRI-Leitlinie G4. Halten die Berichte was der Standard verspricht?

    Three Minutes - Magazin für Kommunikation, no. 2, pp. 43-45

    NachhaltigEuropan Campus Rottal-Inn

    Zeitschriftenartikel

    Janina Beduhn, Fischer von Mollard, A.

    Berichten im G4-tel Takt

    Three Minutes - Magazin für Kommunikation, no. 1

    NachhaltigEuropan Campus Rottal-Inn

    Zeitschriftenartikel

    Janina Beduhn

    G4-Reporting zur Lieferkette – erste Erfolge in DAX und EURO STOXX

    CSR NEWS, no. 30.03.2015

    Abstract anzeigen

    Beim Einbezug der Lieferkette in die Nachhaltigkeitsberichterstattung nach dem aktuellen Reportingstandard G4 feiern DAX 30 und EURO STOXX 50-Unternehmen erste Erfolge. Es werden vermehrt konkrete Zahlen und Anteile genannt, und einzelne Best Practice-Berichte gehen bereits deutlich über eine Beschreibung von Lieferkette und Lieferantenchecks hinaus. Unsere Kurzstudie zeigt: Die Unternehmen haben sich auf den Weg gemacht!

    NachhaltigEuropan Campus Rottal-Inn

    Zeitschriftenartikel

    J. Hecht, Janina Beduhn

    Geschäftschance oder Kostentreiber: Was die neue CSR-Berichterstattung bedeutet - und was nicht

    GoingPublic Magazin, vol. 14, no. 9, pp. 46-47

    NachhaltigEuropan Campus Rottal-Inn

    Vortrag

    B. Sadoun, Janina Beduhn

    K+S AG: Insights: When sustainability management meets corporate strategy

    Session "Expert Insights: Management Strategies for Innovation and Sustainable Competitive Advantages"

    The 8th International Conference on Sustainability & Responsibility - "Responsible Leadership in Times of Transformation”, Köln

    NachhaltigEuropan Campus Rottal-Inn

    Vortrag

    Janina Beduhn

    Workshop Water Stewardship

    Global Goals Forum, Berlin

    NachhaltigEuropan Campus Rottal-Inn

    Beitrag (Sammelband oder Tagungsband)

    A. Schmeisky, Janina Beduhn

    The K+S brine challenge: Approach to create sustainable solutions

    Global Goals Yearbook 2020, vol. 2020

    ISBN: 9783946284093

    NachhaltigTSZ Weißenburg

    Zeitschriftenartikel

    Y.A.O. Assagra, Altafim, R.A.P., J. do Carmo, R.A.C. Altafim, Dmitry Rychkov, Wirges, W., Gerhard, R.

    A new route to piezo-polymer transducers: 3D printing of polypropylene ferroelectrets

    IEEE Transactions on Dielectrics and Electrical Insulation, vol. 27, no. 5, pp. 1668-1674

    DOI: 10.1109/TDEI.2020.008461

    Abstract anzeigen

    Here, a promising approach for producing piezo-polymer transducers in a one-step process is presented. Using 3D-printing technology and polypropylene (PP) filaments, we are able to print a two-layered film structure with regular cavities of precisely controlled size and shape. It is found that the 3D-printed samples exhibit piezoelectric coefficients up to 200 pC/N, similar to those of other PP ferroelectrets, and their temporal and thermal behavior is in good agreement with those known of PP ferroelectrets. The piezoelectric response strongly decreases for applied pressures above 20 kPa, as the pressure in the air-filled cavities strongly influences the overall elastic modulus of ferroelectrets.

    NachhaltigTC Teisnach Sensorik

    Patent

    Günther Ruhl, G. Lippert, H.-J. Schulze, T. Zimmer

    Method of manufacturing a semiconductor device having graphene material

    DigitalNachhaltigAngewandte InformatikTC Plattling MoMo

    Vortrag

    Nicki Bodenschatz

    Optimierte Ladeplanung von E-Fahrzeugflotten

    2. TRIOKON 2020 – Die ostbayerische Transferkonferenz für Wirtschaft, Wissenschaft und Gesellschaft, Landshut

    DigitalNachhaltigAngewandte InformatikTC Plattling MoMo

    Vortrag

    Markus Eider

    Projekt CITRAM - Citizen Science for Traffic Management

    2. TRIOKON 2020 – Die ostbayerische Transferkonferenz für Wirtschaft, Wissenschaft und Gesellschaft, Landshut

    DigitalNachhaltigAngewandte InformatikTC Plattling MoMo

    Vortrag

    Markus Eider, Andreas Berl

    Requirements for prescriptive recommender systems extending the lifetime of EV batteries

    2020 10th International Conference on Advanced Computer Information Technologies (ACIT), Deggendorf

    DigitalNachhaltigAngewandte InformatikTC Plattling MoMo

    Vortrag

    Nicki Bodenschatz, Markus Eider, Andreas Berl

    Mixed-Integer-Linear-Programming model for the charging scheduling of electric vehicle fleets

    2020 10th International Conference on Advanced Computer Information Technologies (ACIT), Deggendorf

    NachhaltigTSZ Weißenburg

    Zeitschriftenartikel

    Wang, J., Dmitry Rychkov, Q. Nguyen, Gerhard, R.

    Unexpected bipolar space-charge polarization across transcrystalline interfaces in polypropylene electret films

    Journal of Applied Physics, vol. 128, no. 13

    DOI: 10.1063/5.0022071

    Abstract anzeigen

    A double-layer transcrystalline polypropylene (PP) film with a flat central interface layer between its two transcrystalline layers is obtained by recrystallization from the melt between two polytetrafluoroethylene (PTFE) surfaces on both sides of the PP film. Its electret properties are studied and compared with those of a single-layer transcrystalline PP film re-crystallized in contact with only one PTFE surface. Within experimental uncertainty, the two types of transcrystalline films exhibit the same thermal properties and crystallinities. After thermal poling, however, two hetero-charge layers of opposite polarity are found on the internal interfaces of the double-layer transcrystalline films and may together be considered as micrometer-sized dipoles. The unexpected phenomenon does not occur in single-layer transcrystalline samples without a central interface layer, suggesting that the interfaces between the transcrystalline layers and the micrometer-thick central interface layer may be the origin of deeper traps rather than the crystalline structures in the transcrystallites or the spherulites. The origin of the interfacial charges was also studied by means of an injection-blocking charging method, which revealed that intrinsic charge carriers introduced during recrystallization are most likely responsible for the interfacial charges. It is fascinating that a material as familiar as PP can exhibit such intriguing properties with a special bipolar space-charge polarization across the central interface layer after quasi-epitaxial surface moulding into a double-layer transcrystalline form. In addition to applications in electret (micro-)devices for electro-mechanical transduction, the highly ordered structures may also be employed as a new paradigm for studying charge storage and transport in polymer electrets and in dielectrics for DC electrical insulation.