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Ralf Riedel (born February 11, 1956) is a German professor of Materials Science at the Technical University of Darmstadt (TU Darmstadt) in Germany. He is known for his contributions to ceramics, polymer-derived ceramics (PDCs), and high-performance materials, which has advanced the understanding and application of ceramic materials in diverse fields such as aerospace, automotive, and energy technologies.
Early life and education
Riedel studied chemistry at the University of Stuttgart with his Diploma Thesis concerning "Versuche zur Reduktion von Aldehyden mit weißem Phosphor". From 1984, he pursued a Ph.D. in the field of Inorganic Chemistry at the University of Stuttgart. In 1986, he graduated with his dissertation Weißer Phosphor als Edukt für die Synthese phosphororganischer Verbindungen.
After education, Riedel undertook postdoctoral research at Max Planck- Institute for Metals Research, Institute for Materials Research, PML, Stuttgart, where he expanded his expertise in materials processing and characterization techniques. Between 1986 and 1992, he worked on his habilitation concerning "Nicht-oxidische Keramiken aus anorganischen Vorstufen" under supervision of Prof. Dr. G. Becker and Prof. F. Aldinger.
Career
Riedel was establishing and leading the Dispersive Solids Group at the Institute of Materials Science, Technical University of Darmstadt (TU Darmstadt) as professor from 1993 until his retirement in 2022. His research in the Dispersive Solids Group focused on the development of polymer-derived ceramics, high- temperature materials, and functional ceramics for structural and electronic applications.
Ralf Riedel's career spans several decades and is marked by contributions to materials science, particularly in the development and application of polymer-derived ceramics (PDCs) as well as high pressure materials synthesis. His work bridges theoretical research and practical applications, impacting industries ranging from aerospace to electronics. Below is a detailed exploration of his professional journey.
Research contributions
Riedel´s early research focused on developing ceramic materials through innovative synthesis routes, Highlights of Riedel´s research at the Dispersive Solids Group are as follows:
Polymer-Derived Ceramics (PDCs)
Riedel is known for his work on PDCs. He has developed methods to design ceramics at the molecular level, enabling the production of materials with tailored properties. These advances have applications in high-performance coatings, lightweight structural materials, and energy storage technologies. His research into PDCs has been important in extending their use to fields like aerospace engineering and microelectronics.
High-Temperature Ceramics
Riedel's work on ceramics designed for high-temperature environments has advanced the understanding of the thermal stability, creep resistance, and oxidation behavior of ceramics under extreme conditions.
Ceramic Composites
In addition to PDCs, Riedel has contributed to the field of ceramic composites, where he has developed lightweight, high-strength materials by integrating ceramic matrices with other reinforcing materials. These composites are used in applications requiring exceptional mechanical properties, such as turbine blades and wear-resistant components.
Sustainability and Green Technologies
In recent years, Riedel has focused on using sustainable materials and processes in ceramics manufacturing, contributing to the development of environmentally friendly materials for energy-efficient systems.
Collaboration with Industry
Throughout his career, Riedel has worked closely with industrial partners to ensure the translation of his research into practical applications. He has collaborated with companies in sectors such aerospace, automotive and energy
Awards and honors
1999: Dionyz-Stur-Gold Medal for Merits in Natural Science, Slovak Academy of Science, Bratislava, Slovak Republic
2000: Fellow of "The American Ceramic Society" (USA)
2004: Elected Member of the "World Academy of Ceramics"
2005: Nomination as Guest Professor at the Jiangsu University, Zhenjiang, China
2006: Honorary Doctor (Dr. h. c.) of the Slovak Academy of Sciences, Bratislava, Slovak Republic
2009: Honorary Professor (Prof. h. c.) of the Tianjin University, Tianjin, P.R. China
2011: Edward C. Henry Award of the American Ceramic Society
2012: Tammann-Gedenkmünze of the Deutschen Gesellschaft für Materialkunde
2013: Fellow of the European Ceramic Society
2014 - 2017: Guest Professor at Xiamen University, China
2014: Fellow of the School of Engineering at The University of Tokyo, Japan
2016: Adjunct Professor at Northwestern Polytechnical University, Xi´an, China
2018: Innovation Talents Award of Shaanxi Province, China (0.5 Mio CNY)
2019: JSPS Fellowship Award for Research, Japan
2020: International Ceramics Prize 2020 for "Basic Science" of the World Academy of Ceramics (5.000 €)
2021: Honorary Professor (Prof. h. c.) of the Xiamen University, Xiamen, P.R. China
2022: Elected Member of the International Institute for the Science of Sintering (IISS), Belgrade, Serbia
2022: JECS Trust Award as recognition of ceramists who have made an outstanding contribution to the development of the Journal of the European Ceramic Society by publishing their high‐quality papers in the Journal
Selected Publications
1. Li Lu, Tonghui Wen, Wei Li, Qingbo Wen, Zhaoju Yu, Shasha Tao, Jincan Yang, Yalei Wang, Xingang Luan, Xiang Xiong, Ralf Riedel, Single-source-precursor synthesis of dense monolithic SiC/(Ti0.25Zr0.25Hf0.25Ta0.25)C ceramic nanocomposite with excellent high-temperature oxidation resistance, J. Eur. Ceram. Soc. 44 (2024) 556-609.
2. Honghong Tian, Magdalena Graczyk-Zajac, Alois Kessler, Anke Weidenkaff, Ralf Riedel, Recycling and Reusing of Graphite from Retired Lithium-ion Batteries: A Review, Adv. Mater. 2023, 2308494
3. Liu, Jiongjie; Dong, Changyu; Lu, Xuefeng; Qiao, Zhuhui; Zhou, Feng; Liu, Weimin; Riedel, Ralf, Sn-containing Si3N4-based composites for adaptive excellent friction and wear in a wide temperature range, Journal of the European Ceramic Society, 42 (2022), 913-920.
4. Shrikant Bhat, Leonore Wiehl, Shariq Haseen, Peter Kroll, Konstantin Glazyrin, Philipp Gollé Leidreiter, Ute Kolb, Robert Farla, Jo-Chi Tseng, Emanuel Ionescu, Tomoo Katsura, and Ralf Riedel, A Novel High-Pressure Tin Oxynitride Sn2N2O, Chem. Eur. J. 0.1002/chem. 201904529.
5. Takashi Taniguchi, Dmytro Dzivenko, Ralf Riedel, Thierry Chauyeau, Andreas Zerr, Synthesis of cubic zirconium (IV) nitride, c-Zr3N4, in the 6-8 GPa pressure region, Ceramics international 45 (2019) 20028-20032.
6. Reinold, L.M.; Yamada, Y.; Graczyk-Zajac, M.; Munakata, H.; Kanamura, K.; Riedel, R.; "The influence of the pyrolysis temperature on the electrochemical behavior of carbon-rich SiCN polymer-derived ceramics as anode materials in lithium-ion batteries", J. Power Sources 282 (2015) 409-415.
7. Maged F. Bekheet, Marcus Schwarz, Stefan Lauterbach, Hans-Joachim Kleebe, Peter Kroll, Ralf Riedel, Aleksander Gurlo, "Orthorhombic In2O3: A metastable polymorph of indium sesquioxide", Angew. Chem. Int. Ed. 52 (2013) 6531-6535.
8. S. Sen, S. J. Widgeon, A. Navrotsky, G. Mera, A. Tavakoli, E. Ionescu, R. Riedel, "Can carbon substitute for oxygen in silicates in planetary interiors?", Proceedings of the National Academy of Sciences (PNAS) 110 (2013) 15904 – 15907.
9. E. Horvath-Bordon, R. Riedel, P. F. McMillan, P. Kroll, G. Miehe, P.A. van Aken, A. Zerr, P. Hoppe, O. Shebanova, I. McLaren, S. Lauterbach, E. Kroke, R. Boehler, High-pressure synthesis of crystalline carbon nitride imide, C2N2(NH). Angew. Chem. Int. Ed. 46 (2007) 1476.
10. A. Zerr, G. Miehe, G. Serghiou, M. Schwarz, E. Kroke, R. Riedel, H. Fueß, P. Kroll, R. Boehler, Synthesis of cubic silicon nitride. Nature 400 (1999) 340.
References
- ^ Darmstadt, Technical University of. "Prof. Dr. Ralf Riedel". TU Darmstadt. Retrieved 2025-01-05.
- Colombo, Paolo; Mera, Gabriela; Riedel, Ralf; Sorarù, Gian Domenico (2010). "Polymer-Derived Ceramics: 40 Years of Research and Innovation in Advanced Ceramics". Journal of the American Ceramic Society. 93 (7): 1805–1837. doi:10.1111/j.1551-2916.2010.03876.x. ISSN 1551-2916.
- ^ Riedel, Ralf; Chen, I-Wei, eds. (2013-08-08). Ceramics Science and Technology. Wiley. doi:10.1002/9783527631940. ISBN 978-3-527-31149-1.
- "Ralf Riedel". scholar.google.de. Retrieved 2025-01-05.
- "Ralf Riedel: Materials Science H-index & Awards - Academic Profile". Research.com. Retrieved 2025-01-05.
- ^ Colombo, Paolo; Mera, Gabriela; Riedel, Ralf; Sorarù, Gian Domenico (2010). "Polymer-Derived Ceramics: 40 Years of Research and Innovation in Advanced Ceramics". Journal of the American Ceramic Society. 93 (7): 1805–1837. doi:10.1111/j.1551-2916.2010.03876.x. ISSN 1551-2916.
- Ionescu, Emanuel; Bernard, Samuel; Lucas, Romain; Kroll, Peter; Ushakov, Sergey; Navrotsky, Alexandra; Riedel, Ralf (2019). "Polymer-Derived Ultra-High Temperature Ceramics (UHTCs) and Related Materials". Advanced Engineering Materials. 21 (8): 1900269. doi:10.1002/adem.201900269. ISSN 1527-2648.
- Alvi, Sajid Ali; Akhtar, Farid (2018-10-10). "High temperature tribology of polymer derived ceramic composite coatings". Scientific Reports. 8 (1): 15105. doi:10.1038/s41598-018-33441-8. ISSN 2045-2322. PMC 6180137. PMID 30305660.
- Uniresearch (2021-12-07). ""Si-based polymer-derived ceramics for energy conversion and storage"". SIMBA. Retrieved 2025-01-05.
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