A5034874741- Advancements in Solid Oxide Fuel Cells
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Advanced ceramic materials synthesis
- Electrocatalysts for Energy Conversion
- Electronic and Structural Properties of Oxides
- Fuel Cells and Related Materials
- Glass properties and applications
- Catalysis and Oxidation Reactions
- High-Temperature Coating Behaviors
- Ferroelectric and Piezoelectric Materials
- Chemical Looping and Thermochemical Processes
- Magnetic and transport properties of perovskites and related materials
- Recycling and utilization of industrial and municipal waste in materials production
- Metallurgical Processes and Thermodynamics
- biodegradable polymer synthesis and properties
- Nuclear materials and radiation effects
- Catalytic Processes in Materials Science
- Chalcogenide Semiconductor Thin Films
- Hybrid Renewable Energy Systems
- Catalysis and Hydrodesulfurization Studies
- Polymer Foaming and Composites
- Phase Equilibria and Thermodynamics
- Quantum Dots Synthesis And Properties
- Advanced materials and composites
Technical University of Denmark
2010-2021
University of St Andrews
2015
IRD Fuel Cells (Denmark)
2012
Nordic Laboratory for Luminescence Dating
2006-2008
University of Oslo
1989
A review describing how compositional design of modified strontium titanates can lead to conductive, redox stable SOFC anodes.
Abstract A new glass‐ceramic composition containing Si, Mg, Ca, Na, Al, Zr, and B is presented here as sealant for planar SOFCs/SOECs, with the aim of joining metallic interconnect (Crofer22APU) to solid oxide cell (YSZ electrolyte or CGO barrier layer). Characteristic temperature, thermo‐mechanical properties, compositional variations are reviewed discussed by thermal analyses in situ XRD, order design optimize sealing profile reduce residual porosity. The glass after heat treatment...
Summary Kikuchi bands in election backscattered diffraction patterns (EBSP) contain information about lattice constants of crystallographic samples that can be extracted via the Bragg equation. An advantage constant measurement from EBSPs over (XRD) is ability to perform local analysis. In this study, cubic STN and YSZ pure materials co‐sintered composites were measured their acquired at 10 kV using a silicon single crystal as calibration reference. The EBSP distortion was corrected by...
Abstract Stack tests were run at 850 °C for periods from 80 hours to 1,150 develop contacting procedures and the same time evaluate performance of a 5 μm electroplated nickel coating on ferritic Fe22Cr interconnect. The metallic reacted relatively quickly during initial heating 1,030 °C. During this time, 20–70 thick surface layers austenitic steel formed, which covered by 1–4 chromia layer anode side mixed Cr‐Fe‐Ni‐spinels over cathode side. microstructure composition protective scale was...
Solid oxide cells require seals that can function in harsh, elevated temperature environments. In addition, a low Si content be advantageous, since impurities from the glass sealant transported to active fuel electrode and poison Ni-YSZ triple phase boundaries. To reduce amount of emission, containing sealing (chemical composition: 50 mol% CaO, 20 ZnO, B2O3 10 SiO2) was developed at DTU. this work, results thermal characterization, crystallization behavior long-term stability adhesion were...
The structures of two synthetic oxyborates, the magnesium – manganese ludwigite Mg1.93Mn1.07O2BO3 and pure cobalt Co3O2BO3 have been investigated by single crystal X-ray diffraction techniques. space group symmetries both borates is Pbam, Z = 4. unit cell dimensions are a 9.202(2), b 12.532(2) c 2.993(1) Å for Mg Mn borate, 9.275(1), 12.146(1) 3.0265(3) Co borate.
Abstract Poly( l ‐lactide) in its ‐form has promising mechanical properties. Being a semicrystalline polymer, it can be subjected to strain‐induced crystallization at temperatures above T g and thereby become oriented. Following simultaneous ( SIM ) biaxial strain process or sequential SEQ process, the properties of biaxially strained tubes further improved. This study investigated these relation their morphology crystal orientation. Both processes yield same strength modulus, yet exhibit...
This study investigates the effect of focused ion beam (FIB) current and accelerating voltage on electron backscatter diffraction pattern quality yttria-stabilized zirconia (YSZ) Nb-doped strontium titanate (STN) to optimize data acquisition time for 3D-EBSD experiments by FIB serial sectioning. Band contrast band slope were used describe quality. The probe currents investigated ranged from 100 5000 pA was either 30 or 5 kV. results show that kV milling induced a significant reduction STN...
Using model catalysts, we demonstrate that CO desorption from Ru surfaces can be switched typical of single crystal to one more characteristic supported nanoparticles. First, the behaviour nanoparticles on highly oriented pyrolytic graphite was studied. Both mass-selected and thermally evaporated were deposited. TPD spectra exhibit a peak located around 410 K with broad shoulder extending 480 600 K, while obtained feature ∼350 ∼450 K. A room temperature deposited 50 Å thick film displays...
ABSTRACT Poly( l ‐lactide) (PLLA) is a bioabsorbable polymer with high stiffness and strength compared to the other commercially available polymers. The properties of PLLA can be improved by straining, causing deformation‐mediated molecular orientation. tubes were biaxially strained above their T g for improvement strength, in two‐step process (sequential straining). Mechanical crystal morphology investigated as function processing strain rate temperature. DSC revealed that low allows chain...
Abstract Single‐phase lanthanum and niobium co‐doped strontium titanate (Sr 1–3 x /2 La Ti 0.9 Nb 0.1 O 3 ; = 0–0.02) ceramics were prepared. Dilatometry in reducing atmosphere showed an increase the sintering rate sintered density with amount. Microscopy of fractured surfaces samples that average grain size increased drastically conditions increasing content (and associated A‐site vacancies). By incorporating 2 mol.% La, electronic conductivity significantly improved from 80 to 135 S cm −1...