Synthesis and properties of high-purity alumina

Journal Article · Thu Jul 01 00:00:00 EDT 1993 · American Ceramic Society Bulletin; (United States)

OSTI ID:6271787

Martin, E S; Weaver, M L ^[1]

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1. Aluminum Co. of America, Alcoa Center, PA (United States). Chemical Systems Div.

High-purity alumina is intended primarily for the high-pressure sodium-vapor lamp envelope market and other specialty alumina applications such as abrasives, catalysts, and structural ceramics. High-purity alumina must calcine to Al[sub 2]O[sub 3] with minimal metal impurities ([>=]99.99% Al[sub 2]O[sub 3]). Sulfate and chloride impurities are also undesirable. High-purity alumina should have less than 20ppm alkali and alkaline-earth metals, and less than 10 ppm each in transition-metal impurities. A process for synthesizing alumina by converting pure aluminum metal to aluminum hydroxide and the resultant alumina properties are described.

• OSTI ID: 6271787
• Journal Information: American Ceramic Society Bulletin; (United States), Vol. 72:7; ISSN 0002-7812
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ALUMINIUM OXIDES
SYNTHESIS
CALCINATION
CHEMICAL REACTIONS
DENSITY
IMPURITIES
LEACHING
MECHANICAL PROPERTIES
MICROSTRUCTURE
OXIDATION
PRECIPITATION
ALUMINIUM COMPOUNDS
CHALCOGENIDES
DECOMPOSITION
DISSOLUTION
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PYROLYSIS
SEPARATION PROCESSES
THERMOCHEMICAL PROCESSES
360201* - Ceramics
Cermets
& Refractories- Preparation & Fabrication
400201 - Chemical & Physicochemical Properties