- Aluminium oxide is
an amphoteric oxide of aluminium with the chemical formula
Al2O3.
- Aluminium oxide is
an electrical insulator but has a relatively high thermal conductivity
(40 W/m K).
- The most common form
of crystalline alumina, α-aluminium oxide, is known as corundum.
- Aluminium oxide is
an excellent thermal and electrical insulator.
- Al2O3 is the most
mature high technology ceramic. It is the same composition as
sapphire,
which accounts for its high hardness and
durability.
- Bauxite has to be
processed into pure aluminium oxide (alumina) before it can be converted
to aluminium by electrolysis.
- Alumina, or
aluminium oxide (Al2O3) is refined from bauxite in a caustic soda/high
temperature process. Caustic solution is used to dissolve the alumina,
which is settled out, filtered and heated to evaporate the water.
- Bauxite mining
occurs mainly in tropical and subtropical areas in Latin America, South
America, West and Central Africa, and
Australia.
- Bauxite cannot be
used as the basic material for the production of metallic aluminium.
Therefore, it must be refined into aluminium
oxide
(Al2O3).
- This is done using
the Bayer method, a process in which crushed and ground bauxite is
dissolved in an alkaline water solution - the Bayer
liquid.
- Aluminium can be
produced via two different routes: primary aluminium production from ore
and recycling aluminium from process scrap and used aluminium
products.
- Treatment of the
run-of-mine bauxite consists mainly of crushing and drying before
shipment. Ore wagons are tipped individually, the material being crushed
to –100mm before stockpiling.
- The concentrate with an
increased content of aluminum oxide can be processed either means of
caking or hydrochemically.
- The major uses of
speciality aluminium oxides are in refractories, ceramics, polishing and
abrasive applications.
- Aluminium oxide is
also used in preparation of coating suspensions in compact fluorescent
lamps.
- Minor uses include
use in toothpast formulations, and as a medium for
chromatography.
- Its applications are
widespread, and include spark plugs, tap washers, pump seals, electronic
substrates, grinding media, abrasion resistant tiles, cutting tools,
bioceramics, (hip-joints), body armour, laboratory ware and wear parts
for the textile and paper industries.
- Annual world
production of aluminia is approximately 60 million tonnes, over 90% of
which is used in the manufacture of aluminium metal.
- The United States
once had a more dominant position but new reduction plants have been
moving to countries with less expensive hydro and coal power such as
Norway, Brazil, Venezuela, and Australia.
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Introduction
- Aluminium
Oxide
- Aluminium Oxide
Properties
- Aluminium Oxide -
info
- Aluminium Oxide
Structure
Products
- Brown Aluminium
Oxide
- Calcined Aluminium
Oxide Powder
- Aluminium Oxide
Chromatography
- Aluminium
Oxide for Chromatography and Purification Processes
-
Aluminum Oxide series of products for polishing
applications
-
Industrial Products
MSDS
-
Aluminium oxide
-
Aluminium Oxide MSDS
-
Magnesium Oxide and Aluminum Oxide Insulation
Products
-
Activated Alumina
-
Alpha-Alumina
-
Safety
data for aluminium oxide
-
MSDS of
Aluminium Oxide
-
White
Aluminum Oxide
Patent
-
Anodic
Aluminium Oxide Passive Alignment Structures
-
Process
for the Deposition of Aluminium Oxide Coatings
-
Granules
Based on Pyrogenically produced Aluminium Oxide, Process for the
Production thereof and use thereof
-
Process
for the Manufacturing of Grinding Elements from Aluminium oxide without
Firing Accessories
-
Aluminium
Oxide Powder and Process
-
Process
for Producing Aluminium Oxide Beads
Technology
-
High Metal
Removal. Reduced Grinding Costs
-
Development of Technology for Separation of Aluminium
Oxide from Ash and Slag of Kuzbass Thermal Power
Plants
-
Xentaur Hyper-Thin-Film
(HTF™)
Aluminum Oxide Technology -
Innovations in Aluminium Oxide
Coating Technology Launch Transparent High - Barrier Polyester
Packaging
-
The Principles of
Operation
for Aluminium Oxide Moisture
Sensors -
The Reactive Sputter Deposition
of Aluminium Oxide Coatings Using High Power Pulsed Magnetron Sputtering
-
Laser Surface Modification of
Thermal Sprayed Aluminium Oxide Coatings
Applications
- Production
applications of aluminum oxide ceramics
- Industrial Uses
- Application of
ultra-thin aluminum oxide etch mask made byatomic layer deposition
technique
- Aluminum Oxide
Porous Ceramics
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Mining and Production Process
-
Process
for active aluminium oxide production
- Electrolytic
Production of Alumina
- Mining and
Production
- Aluminium Ore Mining
Operations
- Production of
Aluminum Oxide Crystals for OSL Dosimetry
- Bauxite
mining
- Production
process
- From Bauxite to
Aluminium - The Production Process
-
Alumina
(Aluminium Oxide) – The Different Types of Commercially Available
Grades Company Profiles
- Company from
Maharshtra
- Company from
USA
- Company from North
America
- Another Company from
USA
- Company from
Texas
- Company from New
York
- Company from
Illinois
- Company from
Gujarat
- Company from
China
Suppliers
- Aluminum Oxide
Suppliers
- Suppliers of
Aluminium Oxide
- Companies
List
- Company
Directory
- Aluminium Oxide
Manufacturers and Suppliers
- Aluminium Oxide
Manufacturers
- Suppliers of
Aluminium Oxide
Consultants and
Turnkey Providers
- Aluminum Oxide Experts
- Consultant from
Indiana
- Consultant from
Delhi
- Consultant from
California
- Turnkey Provider
from Ukraine
- Turnkey Provider
from Czech republic
Reports
- Circular
on Issues Concerning Importation of Aluminum Oxide by Enterprises with
Foreign Investment
- Aluminium
oxide film for 2D photonic structure formation
- New process
generates hydrogen from aluminum alloy to run engines, fuel
cells
- Aluminum oxide orbital implant has better
biocompatibility
- Thermoluminescence response of aluminum oxide thin films
to beta-particle and UV radiation
- New Hard Anodization
Process for Nanoporous Aluminium Oxide
- Ultra Thin
Aluminium Oxide Shows Promising Results in Solar Cell
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