Preparation and properties of coated, uniform, inorganic colloidal particles: I. Aluminum (hydrous) oxide on hematite, chromia, and titania
作者： STANKA KRATOHVIL , EGON MATIJEVIĆ
DOI: 10.1111/J.1551-2916.1987.TB00150.X
关键词:
摘要: Spherical alumina (hydrous) oxide particles of narrow size distribution were prepared by first hydrolyzing aluminum sulfate solutions at elevated temperatures in the presence urea. The system was quenched before any solids formed. Dilution room temperature led to sol formation. same procedure produced surface coatings on admixed, preformed solid particles. Uniform hematite, chromium hydroxide, and titania used as core materials. thickness could be varied proper adjustment concentrations particles, salt solutions, reaction time.
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