People

1977 – 1983
Study of Applied Mineralogy, University of Cologne, Germany

1983 – 1988
PhD Thesis at the Institute of Crystallography, University of Cologne, Germany (Dr. rer. nat.)

1998
Habilitation in Crystallography, University of Cologne, Germany

1988 – 1990
Postdoc at the Engineering Department, University of California, Santa Barbara, CA, USA

1990 – 1992
Research Assistant at the Max-Planck Institute for Metals Research, Stuttgart, Germany

1992 – 2000
Akademischer Oberrat at the University of Bayreuth, Germany

2001 – 2004
Associate Professor (tenured) at the Metallurgical and Materials Engineering Dept., Colorado School of Mines, Golden, CO, USA

2004 – 2005
Full Professor (tenured) at the Metallurgical and Materials Engineering Dept., Colorado School of Mines, Golden, CO, USA

2006 – today
Professor (W3), Geo-Material Science, TU-Darmstadt, Germany and Research Professor at the Colorado School of Mines, Golden, CO, USA

2006 – today
Adjunct Professor at the Colorado School of Mines, Golden, CO, USA

2021/22
Organizer & Chair of the Electron Microscopy Conference MC2023 in Darmstadt, Germany

2014
Organizer & Chair of the Symposium “Applied Mineralogy” at the IMA2014 in South Africa

2011
Organizer & Chair of the International Workshop on “Electron Microscopy; Exploring Materials on the Atomic Scale”, Darmstadt, October 2011

2010
Organizer of the Symposium Applied Mineralogy at the International Mineralogical Association, Budapest 2010

2009 – today
Member of the Committee for the Award of the Georg Agricola Medal

2008
Organizer & Chair of the Symposium on “Materials in Mineralogy, Geology and Archaeology”, at the 14th European Microscopy Congress, Aachen, Germany

2007
Co-Organizer of the 24th European Crystallographic Meeting, MicroSymp. 26 “Electron Microscopy”, Marrakech, Morocco.

2007
Organizer of Symposium 15 “Applied Mineralogy” at the Goldschmidt Conference in Cologne, Germany

2003 – today
Associate Editor of the Journal of the American Ceramic Society

1995 Guest-Professor at the University of Toyohashi, Toyohashi, Japan (2 months)

2008 Fellow of the American Ceramic Society

2009 The Charles Hatchett Award 2009

2009 Elected Member of the World Academy of Ceramics

2015 Vice President of the International Society for Asphalt Petrology e.V. at the TU Darmstadt, Germany

Total number of ISI publications: 330

Total number of patents: 4

Books: 2

h-Index = 55

Five Selected Publications

[1] MR. du Merac, H-J. Kleebe, MM. Muller, IE. Reimanis, “Fifty Years of Research and Development Coming to Fruition; Unravelling the Complex Interactions during Processing of Transparent Magnesium Aluminate (MgAl2O4) Spinel”, Journal of the American Ceramic Society, 11, [96] (2013) 3341-3365.

[2] H.-J. Kleebe, G. Gregori, M. Weinmann, P. Kroll, ”Polymer-Derived Ceramics; Microstructure Evolution and Characterization,“ in Polymer-Derived Ceramics. Eds.: P. Colombo, P. Kroll, R. Riedel, H.-J. Kleebe, DEStech Publ., Lancaster, PA, USA (2009) 127-209.

[3] G. Gregori, H.-J. Kleebe, D.W. Readey and G.D. Sorarù, ”Energy-Filtered TEM Study of Ostwald Ripening of Si Nanocrystals in SiCO Glasses,“ J. Am. Ceram. Soc., 89 [5] (2006) 1699-1703.

[4] H.-J. Kleebe, ”Structure and Chemistry of Interfaces in Si3N4 Ceramics Studied by Transmission Electron Microscopy,“ J. Ceram. Soc. Jpn., 105 [6] (1997) 453-475.

[5] R. Riedel, H.-J. Kleebe, H. Schonfelder, F. Aldinger, ”A Covalent Micro/Nano-Composite Resistant to High-Temperature Oxidation," Nature, 374 (1995) 526-528.

Main Research Fields

• Materials characterization via transmission electron microscopy techniques
• High-resolution TEM of domain and defect structures in natural and synthetic materials
• Dynamic microstructure variation upon exposure to severe service conditions
• Correlation between intrinsic micro/nanostructure and materials performance
• Ferroelectric and piezoelectric materials
• Transparent polycrystalline oxide ceramics
• Biomineralization and biomaterials
• High-temperature microstructures
• In situ transmission electron microscopy (TEM)