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144 Publications
2025 | Journal Article | LibreCat-ID: 58510 | 
C. Scheidemann, P. Bornmann, W. Littmann, and T. Hemsel, “Lead-Free Ceramics in Prestressed Ultrasonic Transducers,” Actuators, vol. 14, no. 2, Art. no. 55, 2025, doi: 10.3390/act14020055.
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2025 | Conference Paper | LibreCat-ID: 62300
L. Claes, J. Hölscher, O. Friesen, C. Scheidemann, T. Hemsel, and B. Henning, “Estimation of third order elastic constants of piezoceramics using DC biased impedance measurements,” in 2025 International Congress on Ultrasonics, 2025, pp. 142–145, doi: 10.5162/ultrasonic2025/a18-a6.
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2025 | Conference Paper | LibreCat-ID: 64798 |
C. Scheidemann, P. Bornmann, W. Littmann, and T. Hemsel, “Bolted Langevin transducers with leadfree piezoelectric ceramics,” presented at the International Workshop on Piezoelectric Materials and Applications in Actuators (IWPMA), Vilnius, Lithuania, 2025.
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2025 | Conference Paper | LibreCat-ID: 64800 |
T. Hemsel, C. Scheidemann, P. Bornmann, W. Littmann, and W. Sextro, “Intensive ultrasonic cleaning of surfaces by means of lead-free ultrasonic transducer with focussing sonotrode,” presented at the International Congress on Ultrasonics (ICU), Paderborn, Germany, 2025.
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2025 | Conference Paper | LibreCat-ID: 61755 |
C. Scheidemann, T. Hemsel, and W. Sextro, “Time dependent material characteristics of prestressed piezoelectric ceramics in langevin transducers,” presented at the 22nd International Workshop on Piezoelectric Materials and Applications in Actuators (IWPMA), Vilnius, Lithuania, 2025.
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2025 | Conference Paper | LibreCat-ID: 61757 |
C. Scheidemann, J. Porzenheim, T. Hemsel, and W. Sextro, “Investigation of the Setting Behaviour of Mechanically Biased Piezoelectric Ultrasonic Transducers,” presented at the 2025 International Congress on Ultrasonics (ICU), Paderborn, Germany, 2025.
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2025 | Conference Paper | LibreCat-ID: 64803
P. Bornmann, W. Littmann, C. Scheidemann, and T. Hemsel, “Innovative lead-free ultrasonic bending transducers for low to medium power applications,” presented at the International Congress on Ultrasonics (ICU), Paderborn, Germany, 2025.
LibreCat
2025 | Conference Paper | LibreCat-ID: 64802
W. Littmann, P. Bornmann, T. Hemsel, and C. Scheidemann, “Power ultrasonic actuators with suddenly changing loads: How to control the amplitudes in resonance, antiresonance, or in-between,” presented at the International Conference on Ultrasonics (ICU), Paderborn, Germany, 2025.
LibreCat
2025 | Conference Paper | LibreCat-ID: 64804
M. D. Dohmen, P. Bornmann, W. Littmann, T. Hemsel, and W. Sextro, “Modellgestützte Optimierung eines Ultraschall-Torsionsschweißsystems,” 2025.
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2025 | Conference Paper | LibreCat-ID: 62299
O. Friesen, C. Scheidemann, L. Claes, T. Hemsel, and B. Henning, “Sensitivity Analysis and Material Parameter Estimation of a Pre-Stressed Langevin Transducer,” in 2025 International Congress on Ultrasonics, 2025, pp. 138–141, doi: 10.5162/ultrasonic2025/a18-a4.
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2024 | Journal Article | LibreCat-ID: 51518
O. K. Aimiyekagbon, A. Bender, T. Hemsel, and W. Sextro, “Diagnostics of Piezoelectric Bending Actuators Subjected to Varying Operating Conditions,” Electronics, vol. 13, no. 3, Art. no. 521, 2024, doi: 10.3390/electronics13030521.
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2024 | Journal Article | LibreCat-ID: 57467
D. Lehnert et al., “The Influence of Ultrasonic Irradiation of a 316L Weld Pool Produced by DED on the Mechanical Properties of the Produced Component,” Crystals, vol. 14, no. 11, Art. no. 1001, 2024, doi: 10.3390/cryst14111001.
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2024 | Conference Paper | LibreCat-ID: 61756 |
C. Scheidemann, T. Hemsel, and W. Sextro, “Characteristic behavior of lead-free and lead-containing piezo ring ceramics in ultrasonic transducers,” presented at the 21nd International Workshop on Piezoelectric Materials and Applications in Actuators (IWPMA), Hannover, Germany, 2024.
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2024 | Conference Paper | LibreCat-ID: 56834 |
O. Friesen, L. Claes, C. Scheidemann, N. Feldmann, T. Hemsel, and B. Henning, “Estimation of temperature-dependent piezoelectric material parameters using ring-shaped specimens,” in 2023 International Congress on Ultrasonics, Beijing, China, 2024, vol. 2822, p. 012125, doi: 10.1088/1742-6596/2822/1/012125.
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2023 | Conference Abstract | LibreCat-ID: 51119
C. Scheidemann, O. E. C. Hagedorn, T. Hemsel, and W. Sextro, “Experimental Investigation of Bond Formation and Wire Deformation in the Ultrasonic Wire Bonding Process,” presented at the International Conference on Functional Materials & Devices 2023 (ICFMD 2023), Jeju, Korea, 2023.
LibreCat
2023 | Conference Abstract | LibreCat-ID: 47234
B. Sehlmeyer, R. Kampmann, C. Scheidemann, T. Hemsel, and M. Getzlaff, “Burst Mode of Ultrasonic Resonant Oscillations for Stimulation and Destruction of Tumor Cells,” in Frühjahrstagung 2023, Sektion Kondensierte Materie (SKM), Dresden, 2023.
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2023 | Conference Abstract | LibreCat-ID: 47235
R. Kampmann, B. Sehlmeyer, C. Scheidemann, T. Hemsel, and M. Getzlaff, “Burst Mode Characteristics of an Ultrasonic Transducer for Treatment of Cancer Cells,” in Frühjahrstagung 2023, Sektion Kondensierte Marterie (SKM), Dresden, 2023.
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2023 | Conference Paper | LibreCat-ID: 51117 |
C. Scheidemann, T. Hemsel, O. Friesen, L. Claes, and W. Sextro, “Influence of Temperature and Pre-Stress on the Piezoelectric Material Behavior of Ring-Shaped Ceramics,” presented at the 7th International Conference on Advanced Electromaterials (ICAE 2023), Jeju, Korea, 2023.
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2022 | Book Chapter | LibreCat-ID: 33500
T. Hemsel and J. Twiefel, “Piezoelectric Ultrasonic Power Transducers,” in Reference Module in Materials Science and Materials Engineering, Elsevier, 2022.
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2022 | Report | LibreCat-ID: 52045
C. Scheidemann, T. Hemsel, and W. Sextro, Modellbasierte Ermittlung optimaler Prozessparameter für neuartige Ultraschallbondverbindungen. LibreCat University, 2022.
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