Preparation and properties of coated, uniform, inorganic colloidal particles: I. Aluminum (hydrous) oxide on hematite, chromia, and titania

Journal Article · Thu Oct 01 04:00:00 EDT 1987 · Advanced Ceramic Materials; (USA)

DOI:https://doi.org/10.1111/j.1551-2916.1987.tb00150.x· OSTI ID:6109301

Kratohvil, S; Matijevic, E ^[1]

---

1. Clarkson Univ., Potsdam, NY (USA)

Spherical alumina (hydrous) oxide particles of narrow size distribution were prepared by first hydrolyzing aluminum sulfate solutions at elevated temperatures in the presence of urea. The system was quenched before any solids were formed. Dilution of the prepared solutions at room temperature led to sol formation. The same procedure produced surface coatings on admixed, preformed solid particles. Uniform hematite, chromium hydroxide, and titania were used as core materials. The thickness of the coatings could be varied by proper adjustment of the concentrations of particles, aluminum salt solutions, and reaction time.

• OSTI ID: 6109301
• Journal Information: Advanced Ceramic Materials; (USA), Journal Name: Advanced Ceramic Materials; (USA) Vol. 2:4; ISSN 0883-5551; ISSN ACEME
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CHALCOGENIDES
CHEMICAL PREPARATION
COLLOIDS
DATA
DEPOSITION
DISPERSIONS
EXPERIMENTAL DATA
HEMATITE
INFORMATION
IRON COMPOUNDS
IRON ORES
IRON OXIDES
MEASURING METHODS
MINERALS
NUMERICAL DATA
ORES
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
SURFACE COATING
SYNTHESIS
TRANSITION ELEMENT COMPOUNDS