Papers on "Alumina" and similar term paper topics
Paper #023776 ::
Alumina
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This paper discusses the background history, chemical and physical properties, manufacturing process (the Bayer process) and applications of Alumina.
Written in 2002; 2,675 words; 9 sources;
$ 80.95
Paper Summary:
This paper discusses Alumina or Aluminum Oxide, the only oxide formed by the metal aluminum, which occurs in nature as the minerals corundum, diaspore, gibbsite and most commonly as bauxite, which is an impure form of gibbsite. The author submits that its industrial and commercial use in the modern times took off after the development of the Bayer process, which made possible the wide-scale, low cost production of the material.
Table of Contents
Introduction
Background Information: History of Alumina
Initial Manufacture of Alumina
Manufacture of Aluminum & the Bayer Process
New Natural Forms of Alumina
Properties of Alumina
Mechanical Properties
Thermal Properties
Electrical Properties
Structure of Crystalline Alumina
Alumina (Aluminum Oxide) Structure
Structure of Liquid Alumina
Applications of Alumina
Ceramics
As an Insulating Material
Electronics
Mechanical Ceramics
Military Uses
Bio Medical
Chemical Ceramics
Enameling
Refractory Uses
Chemical Industry
Catalysts, Fillers, and the Glass industry
The Bayer Process
Grinding of Bauxite
Digestion of Bauxite
Settling and washing of Residues
Crystallization of Hydrates
Calcination of Hydrate
Conclusion
From the Paper:
"Fused alumina (the substance produced after being melted and re-crystallized) is identical in chemical and physical properties with natural corundum. It is a very hard material and its hardness is exceeded only by diamond and a few synthetic substances such as carborundum, and silicon carbide. This property of alumina lends itself for use as an abrasive material. Another useful property of the material is its high melting point, i.e., above 2000oC (3632oF), which makes it useful as a refractory and as linings of special furnaces. The mechanical, chemical, and electrical properties of Alumina (99.7% purity) often used in the ceramic industry are depicted in the following tables:..."
Tags:
bauxite bayer thermal ceramics electronics
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