Monodispersed aluminum-substituted hematite particles were synthesized from concentrated mixed solutions of FeCl 3 and AlCl 3 using the gel-sol process. With increasing aluminum content (Al/(Fe + Al)) in the starting solutions, hematite particles became more and more elongated. The product particles exhibited ellipsoidal, rod- and peanut-like shapes, depending on Al concentration. Higher Al content (>20 mol%) in the system greatly suppressed the formation of hematite. Atomic emission spectrometry analysis and lattice parameter measurement confirmed the substitution of Al in hematite particles. (C) 2000 Academic Press.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Surfaces, Coatings and Films
- Colloid and Surface Chemistry