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Red color Surface coated White fused aluminum oxide grit

Red color Surface coated White fused aluminum oxide grit is calcined with a compound-Iridium coating on the surface of each grit under a high temperature. After this treatment, the special iridium-coated aluminum oxide gets an excellent advantage in roughness, better ability to bond, better water affinity, and higher self-sharpening ability.

$1,100.00$1,150.00 / MT

Red color Surface coated White fused aluminum oxide grit

Red color Surface coated White fused aluminum oxide grit is calcined with a compound-Iridium coating on the surface of each grit under a high temperature. After this treatment, the special iridium-coated aluminum oxide gets an excellent advantage in roughness, better ability to bond, better water affinity, and higher self-sharpening ability.

Thus, when making boned abrasive and coated abrasive tools, the grit is more easily bonded with bonder such as resin, glue, ceramic.

Abrasive tools such as cutting wheel, grinding wheel, and flap disc adopting iridium coated aluminum oxide will perform sharper with longer life, higher work efficiency.

Iridium Coated Aluminum Oxide Improvement Comparing with normal WA abrasive material

Micro hardnessRoughnessWater affinitySelf-sharpness
Increase 10%Increase 10%Increase 350%Increase 15%

There are Three kinds of Iridium coated aluminum oxide:

  1. Red color: the coating is with Fe2O3.
  2. White color: coating with non Fe2O3 Iridium. Suitable for contaminant-free abrasive tools working for aviation, food, medical field. And suitable for green color cutting discs.
  3. Ceramic coated aluminum oxide. This type is coated with a ceramic layer out of grains.

Red color Surface coated White fused aluminum oxide grit Physical and Chemical Composition

Physical Properties
Knoop Hardness2240-2340
Hardness: MohsMin 9.0
Specific GravityMin 3.96g/cm3
Bulk Density1.52-2.02g/cm3
Melting Point2250℃
Hydrophilicity218mm (F46)
Toughness57.5% (F46)
Particle ShapeCubic
ColorRed or White
Chemical compositions[%]
Al2O399.3-99.6
Fe2O30.02-0.1
Na2O0.2-0.15

Red color Surface coated White fused aluminum oxide grit Application:

  1. Bonded abrasive cutting and grinding wheel.
  2. High quality refractory.
  3. Spray material
  4. Technical ceramic products.
  5. Molding sand for precision casting.

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