Chrome alumina is a synthetic material produced by fusing high-purity calcined alumina and chromium oxide. Also called red corundum or pink corundum, It is a hard, wear-resistant material with excellent thermal and chemical resistance. Chrome alumina is available in a variety of forms, including grains, powders, and bricks.
- High Melting Point: It has a melting point of about 2435 °C.
- Hardness: Chromium(III) oxide is a hard material, rating 8-8.5 on the Mohs scale of hardness.
- Stability: It’s chemically stable and doesn’t readily react with acids or bases.
- Magnetic Properties: Chrome alumina is weakly ferromagnetic.
- Health and Safety: While generally considered non-toxic, inhalation of chromium(III) oxide dust may cause respiratory irritation. As always, care should be taken when handling and using this compound, especially in powder form.
Chrome alumina is used in a wide range of applications, including:
- Refractories: Chrome alumina is used to make refractories for furnaces, ladles, and other high-temperature applications.
- Abrasives: Chrome alumina is used to make abrasive grinding wheels and other abrasive products.
- Ceramics: Chrome alumina is used to make ceramic products such as tiles, bricks, and electrical insulators.
- Pigments: Chrome alumina is used to make pink and red pigments for paints, plastics, and other materials.
- Other applications: Chrome alumina is also used in a variety of other applications, such as catalyst supports, wear-resistant coatings, and dental implants.
Chrome alumina is a versatile and high-performance material that is used in a wide range of industries.
Specific Application Examples
Here are some specific examples of how chrome alumina is used:
- In the glass industry, chrome alumina is used to make refractories for glass furnaces and to produce a variety of glass products, such as optical glass and borosilicate glass.
- In the steel industry, chrome alumina is used to make refractories for steel ladles and other high-temperature equipment.
- In the automotive industry, chrome alumina is used to make abrasive grinding wheels for finishing metal parts.
- In the electronics industry, chrome alumina is used to make ceramic substrates for electronic components.
- In the construction industry, chrome alumina is used to make ceramic tiles and bricks for high-traffic areas.
Chrome alumina is a valuable material with many important applications.