Isobe, G., Takafumi Maeda, Peter Bornmann, Tobias Hemsel, and Takeshi Morita. “Synthesis of Lead-Free Piezoelectric Powders by Ultrasonic-Assisted Hydrothermal Method and Properties of Sintered (K0.48N.52)NBO3 Ceramics.”https://doi.org/10.1109/TUFFC.2014.6722608__Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions On 61, no. 2 (2014): 225–30.https://doi.org/10.1109/TUFFC.2014.6722608 .
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DOI: 10.1109/TUFFC.2014.6722608

Ageba, Ryo, Yoichi Kadota, Takafumi Maeda, Norihito Takiguchi, Takeshi Morita, Mutsuo Ishikawa, Peter Bornmann, and Tobias Hemsel. “Ultrasonically-Assisted Hydrothermal Method for Ferroelectric Material Synthesis.”https://doi.org/10.3938/jkps.57.918__Journal of Korean Physical Society 57, no. 4 (2010): 918–23.https://doi.org/10.3938/jkps.57.918 .
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Mracek, Maik, Tobias Hemsel, Thomas Sattel, Piotr Vasiljev, and Jörg Wallaschek. “Driving Concepts for Bundled Ultrasonic Linear Motors.”https://doi.org/10.1007/s10832-007-9123-5__Journal of Electroceramics 20, no. 3–4 (2008): 153–58.https://doi.org/10.1007/s10832-007-9123-5 .
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Hemsel, Tobias, Maik Mracek, Jörg Wallaschek, and Piotr Vasiljev. “A Novel Approach for High Power Ultrasonic Linear Motors.”https://doi.org/10.1109/ULTSYM.2004.1417988__In Ultrasonics Symposium, 2004 IEEE, 2:1161–64, 2004.https://doi.org/10.1109/ULTSYM.2004.1417988 .
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DOI: 10.1109/ULTSYM.2004.1417988