Asbjørn Slagtern Fjellvåg’s research interests focuses on materials technology, with focus on the relation between atomic structure and materials properties. This includes how phase stability changes with atomic composition, and how that relates to external properties such as mechanical strength and optical properties. Asbjørn is especially interested in why small changes in composition, and thus a change in the chemical bond in the material, causes a change in the atomic structure and the resulting properties.

Asbjørn is educated at the University of Oslo in materials science and nanotechnology, and has a PhD from 2022. One of his research topics from UiO included structure-property relations of nickel based oxides, utilizing synchrotron radiation X-ray diffraction to study local ordering at the B-site in the perovskite system LaNi_1-x(Pt,Rh)_xO₃. The B-site ordering in these perovskite systems is largely driven by the charges required by the B-site elements. This causes a domain structure to appear in LaNi_1‑xPt_xO₃,with regions especially rich in the ordered double perovskite La₂NiPtO₆ regions; a phenomenon which is absent LaNi_1-xRh_xO₃.His main PhD work however focused on noble metal evaporation and catchment during the industrial ammonia oxidation process, which is step one in the Ostwald process and the production of synthetic fertilizer. His work concluded that fast surface and grain boundary diffusion causes a restructuring of the noble metal based nets used in the industrial Pt-catchment process.