From Nanopowder to Pellet – A Matter of Time

Conceptual illustration of powder diffraction performed on a compacted sample and the atomic, microstructural, and bulk information stored within

12 August 2022

What happens when a powder of nanoparticles is compressed into a pellet and how can we use it to make better magnets for our refrigerators, electric motors, and wind turbines? Frederik H Gjørup has contributed to answer this question during his PhD studies. Using both neutron and X-ray diffraction, Frederik H Gjørup has followed the transition from loose powder to solid pellet while it has been taking place. With diffraction, crystalline materials can be examined on many length scales, from atomic to macroscopic, and with a time resolution of a few thousandths of a second.

With his research, Frederik H Gjørup has investigated new approaches to describing time-resolved diffraction data with physical models, developed a new software to evaluate the quality of the obtained models, and contributed to the development of new state of the art equipment for time-resolved powder-to pellet transition.

The PhD study was completed at Department of Chemistry, Faculty of Natural Sciences, Aarhus University.

This summary was prepared by the PhD student.

Time: Friday, August 12^th at 13:15
Place: Building 1514, room 213, Auditorium I, Department of Chemistry, Aarhus University, Langelandsgade 140, 8000 Aarhus C.
Title of PhD thesis: Understanding the Compaction of Nanopowders Through Neutron and X-ray Diffraction

Contact information: Frederik H Gjørup, e-mail: fgjorup@chem.au.dk, tel.: +45 30926402

Members of the assessment committee:

Professor Paul Henry, ISIS Neutron and Muon Source Rutherford Appleton Laboratory, United Kingdom

Professor Holger Kohlmann, Department of Chemistry, Leipzig University, Germany

Associate Professor Jacob Overgaard (chair), Department of Chemistry, Aarhus University, Denmark

Main supervisor:
Professor Mogens Christensen, Department of Chemistry, Aarhus University, Denmark

Language: The PhD dissertation will be defended in English

The defence is public.
The PhD thesis is available for reading at the Graduate School of Natural Sciences/GSNS,
Jens Baggesens Vej 53, building 5221, second floor, 8200 Aarhus N.