Ida Hasle

• Hasle, Ida; Waldow, Stephan P.; Gries, Ute N.; De Souza, Roger A.; Vøllestad, Einar & Haugsrud, Reidar (2021). B-site cation inter-diffusion in yttrium substituted barium zirconate. Journal of Materials Chemistry A. ISSN 2050-7488. 9(37), p. 21142–21150. doi: 10.1039/d1ta02391h. Full text in Research Archive Show summary

  B-site cation inter-diffusion in the ABO3 perovskite yttrium-substituted barium zirconate (BZY) was studied at temperatures from 1100 to 1460 °C under reducing and oxidising conditions. The experiments followed two different approaches using Ce as a chemical tracer for Zr. By fitting diffusion profiles of the cation obtained by either Electron Probe Microanalysis (EPMA) or Time-of-Flight Secondary Ion Mass Spectrometry (ToF-SIMS), we determined bulk, grain-boundary and effective diffusion coefficients. The activation energies of bulk diffusion (4.5 ± 0.4 eV) are similar to the migration enthalpy obtained by a computational approach (∼4 eV). On this basis, we conclude that the activation energies correspond to the migration enthalpies, assuming that the concentration of Zr vacancies in the bulk was frozen-in. Grain-boundary diffusion coefficients were found to be more than four orders of magnitude higher than the corresponding bulk values, while the activation energies of grain-boundary diffusion are relatively similar to those for bulk. This was attributed to higher concentrations of cation vacancies in space-charge layers at the boundaries. Overall, the results show that BZY electrolytes are highly stable towards degradation related to B-site cation diffusion.

• Sazinas, Rokas; Sakaguchi, Isao; Hasle, Ida Margrete; Polfus, Jonathan M.; Haugsrud, Reidar & Einarsrud, Mari-Ann [Show all 7 contributors for this article] (2017). Tracer diffusion of 96Zr and 134Ba in polycrystalline BaZrO3. Physical Chemistry, Chemical Physics - PCCP. ISSN 1463-9076. 19(32), p. 21878–21886. doi: 10.1039/C7CP04039C. Full text in Research Archive
• Marstein, Erik Stensrud; Hasle, Ida Margrete; Qviller, Atle Jorstad & Haug, Halvard (2014). Neutron and x-ray Reflectometry Investigations of Amorphous Silicon-based Surface Passivation Layers. Energy Procedia. ISSN 1876-6102. 55, p. 813–817. doi: 10.1016/j.egypro.2014.08.064. Full text in Research Archive
• Qviller, Atle Jorstad; Dennison, A.J.C.; Haug, Halvard; You, Chang Chuan; Hasle, Ida Margrete & Østreng, Erik [Show all 12 contributors for this article] (2014). Thermal stability of photovoltaic a-Si:H determined by neutron reflectometry. Applied Physics Letters. ISSN 0003-6951. 105(23). doi: 10.1063/1.4904340. Full text in Research Archive

View all works in Cristin

• Hasle, Ida Margrete; Vøllestad, Einar; Haugsrud, Reidar; De Souza, Roger; Gries, Ute & Waldow, Stephan (2016). B-site Cation (Zr4+) Diffusion in Yttrium doped Barium Zirconate.
• Hasle, Ida Margrete; Haugsrud, Reidar & Polfus, Jonathan M. (2016). Computational Studies of Cation Transport in Barium Zirconate.
• Hasle, Ida Margrete & Haugsrud, Reidar (2015). Metal Cation Inter-diffusion in BaZr0.9Y0.1O3-δ(BZY).
• Hasle, Ida Margrete & Haugsrud, Reidar (2015). Metal Cation Inter-diffusion in BaZr0.9Y0.1O3-δ(BZY) .

View all works in Cristin