Abstract
Ultrafine powders of the binary (Cr 2O 3, Fe 2O 3, SnO 2)–Al 2O 3 systems were synthesized by introducing aqueous solutions containing metal salts into a high temperature inductively coupled plasma, and the distribution of component oxides was investigated by transmission electron microscopy and electrophoretic mobility measurements. For the Cr 2O 3–Al 2O 3 system, each component independently constituted its particles that were homogeneously distributed in the powder. With the Fe 2O 3Al 2O 3, the two components formed solid solutions. In the SnO 2–Al 2O 3, each component comprised the powders where SnO 2 had a strong tendency to occupy the particle surface.
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