3:48 PM - 3:51 PM
[SIT04-P02] Fabrication of textured Fe-free and Fe-bearing olivine aggregates using colloidal processing under high magnetic field
3-min talk in an oral session
Keywords:crystallographic orientation, olivine
Magnetic field was applied to fine-grained (〜120 nm) equigranular Fe-free and Fe-bearing olivine particles, which were dispersed in ethanol (solvent) with dispersant (polyethyleneimin). We expected the particles to align with respect to magnetic direction due to their magnetic anisotropy. The aligned particles were gradually deposited on a solid-liquid separation filter during ethanol drainage. The directions of magnetic field and particle deposition were parallel. The dried particles were then densified isostatically at 200 MPa for 10 min and sintered using the alumina tube furnace with vacuum pump.
Highly dense (density of ≧ 99%) and fine grained (〜1 μm) samples with a-axis alignment for Fe-free and c-axis alignment for Fe-bearing olivine to the magnetic direction were obtained. Such synthesized aggregates will allow us to measure CPO effect on the physical properties of olivine aggregate.