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Hybrid magnetic iron oxide nanoparticles with tunable field-directed self-assembly

Malik, Vikash ; Pal, Antara ; Pravaz, Olivier ; Crassous, Jérôme J. ; Granville, Simon ; Grobéty, Bernard ; Hirt, Ann M. ; Dietsch, Hervé ; Schurtenberger, Peter

In: Nanoscale, 2017, vol. 9, no. 38, p. 14405-14413

We describe the synthesis of hybrid magnetic ellipsoidal nanoparticles that consist of a mixture of two different iron oxide phases, hematite (α-Fe2O3) and maghemite (γ- Fe2O3), and characterize their magnetic field-driven self-assembly. We demonstrate that the relative amount of the two phases can be adjusted in a continuous way by varying the reaction time during the synthesis, leading to...

In situ ESEM observation of melting silver and Inconel on an Al2O3 powder bed

Fischer, Simon ; Lemster, Katja ; Kaegi, Ralf ; Kuebler, Jakob ; Grobéty, Bernard

In: Journal of Electron Microscopy, 2004, vol. 53, no. 4, p. 393-396

Manufacturing of tubular dead-end membranes by continuous thermoplastic extrusion

Salehi, Mehdi ; Pfaff, Ewald M. ; Kaletsch, Anke ; Graule, Thomas ; Clemens, Frank ; Grobéty, Bernard

In: International Journal of Applied Ceramic Technology, 2015, vol. 12, p. E13–E18

Dense and gastight dead-end tubular Ba0.5Sr0.5Co0.8Fe0.2O3-δ (BSCF) membranes were fabricated by thermoplastic extrusion. Optimal feedstocks for the extrusion of dead-end tubular structures were obtained for a feedstock consisting of 89.83 wt% BSCF powder, 5.63 wt% ethylene vinyl acetate (EVA), 3.56 wt% paraffin wax (PW), and 0.98 wt%...