A5015623775- Advanced ceramic materials synthesis
- Advanced Cellulose Research Studies
- Electromagnetic wave absorption materials
- Aluminum Alloys Composites Properties
- Membrane Separation and Gas Transport
- MXene and MAX Phase Materials
- Natural Fiber Reinforced Composites
- Advanced materials and composites
- Nanocomposite Films for Food Packaging
- High-pressure geophysics and materials
- Magnesium Oxide Properties and Applications
- Geological and Geochemical Analysis
- Clay minerals and soil interactions
Technical University of Darmstadt
2020-2023
ABSTRACT A zirconium and a zirconium/boron containing single‐source precursor were synthesized via chemical modification of commercially available polysilazane (Durazane 1800) with tetrakis (dimethylamido) (IV) (TDMAZ) as well both TDMAZ borane dimethyl sulfide complex, respectively. The polymer‐to‐ceramic transformation the precursors into SiZrCN SiZrBCN ceramics thermal evolution their phase composition microstructure was studied. pyrolysis led to formation amorphous ceramics....
Abstract Cellulose‐based paper samples were surface‐modified by a polymeric single‐source precursor prepared from perhydropolysilazane (PHPS) and iron(III)acetylacetonate (Fe(acac) 3 ) ammonolyzed at 500°C, 700°C, 900°C, 1000°C, leading to C/SiFe(N,C)O‐based ceramic papers with in situ‐generated hierarchical micro/nano‐morphology. As reference, cellulose‐free under the same conditions. Upon thermal treatment, microstructure evolutions of resulting reference sample comparatively investigated....
Abstract Naturally occurring single crystals of bixbyite, (Fe,Mn)2O3, from the Thomas Mountain Range in Utah, U.S.A., were studied via (scanning) transmission electron microscopy (S)TEM. With up to 5 cm edge length, these mineral specimens are largest bixbyite found worldwide. Their hexahedral shapes often modified by {211} facets at corners and small truncations along their cube edges. Characteristic lamellar defects, running parallel {100} planes, can be observed TEM imaging. The defects...
Abstract SiFeO(N,C)‐based ceramic papers were prepared via a one‐pot synthesis approach by dip‐coating cellulose‐based paper template with polymeric perhydropolysilazane precursor modified iron(III)acetylacetonate. The preceramic composites subsequently pyrolyzed in ammonia atmosphere at 500, 700, and 1000°C, respectively, the characteristics of three resulting comparatively investigated. Scanning electron microscopy revealed that each sample, morphology is successfully transferred on...