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JIS Standard White Fused Alumina for Coated Cloth Abrasives White Fused Alumina Wfa
White Fused Alumina Introduction
White fused alumina (WFA) is a synthetic abrasive material produced by fusing high-purity alumina in an electric arc furnace at high temperatures. It has a crystal structure primarily composed of corundum (Al2O3) and is known for its exceptional hardness, strength, and high purity. White fused alumina is available in different forms, including grits, sand, and powder, and is used in a variety of applications: Grinding and Polishing, Surface Preparation, Refractories, Precision Casting, Abrasive Blasting, Superabrasives, Ceramics and Tiles, and etc.
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Chemical Position Standards:
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Code and Size Range
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Chemical Composition%
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AI2O3
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SiO2
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Fe2O3
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Na2O
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F90-F150
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≥99.50
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≤0.10
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≤0.05
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≤0.30
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F180-F220
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≥99.50
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≤0.10
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≤0.05
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≤0.30
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#240-#3000
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≥99.50
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≤0.10
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≤0.05
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≤0.30
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#4000-#12500
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≥99.50
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≤0.10
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≤0.05
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≤0.30
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Physics Properties:
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Color
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White
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Crystal form
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Triangal crystal system
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Mohs hardness
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9.0-9.5
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Micro hardness
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2000-2200 kg/mm²
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Melting point
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2250
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Maximum operating temperature
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1900
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True density
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3.90 g/cm³
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Bulk density
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1.5-1.99 g/cm³
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Grinding and Polishing: abrasive wheels, belts, and discs for precision grinding of metals, ceramics, and composites.
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Surface Preparation: removing scale, rust, paint, and other surface contaminants from metal substrates
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Refractories: firebricks, refractory castables, and other shaped or unshaped refractory products
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Precision Casting: high-dimensional accuracy, smooth surfaces, and improved casting quality.
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Abrasive Blasting: remove rust, paint, scale, and other contaminants from surfaces without causing damage.
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Superabrasives: high-speed steels, tool steels, and ceramics
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Ceramics and Tiles
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