White Fused Alumina | High-Purity Aluminum Oxide Abrasive & Refractory Material
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High Purity: Over 99% Al₂O₃ for reliable performance.
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Extreme Hardness: Mohs 9 ensures superior abrasive strength.
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Thermal Stability: Withstands temperatures up to ~2050°C.
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Chemical Resistance: Resistant to acids, alkalis, and oxidation.
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Versatile Applications: Ideal for abrasives, refractories, and sandblasting.
WFA - High-Purity Abrasive & Refractory Material Introduction
WFA, also known as White Corundum or White Aluminum Oxide, is produced by melting high-purity aluminum oxide in an electric arc furnace. Top white fused alumina manufacturers deliver superior white fused alumina powder trusted by leading white fused alumina suppliers. Renowned white fused alumina manufacturers ensure high-quality white fused alumina powder, while expert white fused alumina suppliers distribute premium white fused alumina powder. Dedicated white fused alumina manufacturers and reliable white fused alumina suppliers work together to offer excellent white fused alumina powder.

Key Features
Extreme Hardness: Mohs hardness of 9, making it one of the hardest synthetic abrasives.
High Purity: Over 99% Al₂O₃, ensuring minimal contamination.
Thermal Resistance: High melting point (~2050°C), suitable for high-temperature applications.
Chemical Stability: Resistant to acids, alkalis, and oxidation.
Excellent Cutting & Grinding Performance: Sharp edges provide precise material removal.
Applications
1. Abrasives Industry
WFA is widely used in bonded and coated abrasives, such as:
Grinding wheels
Sandpaper
Polishing compounds
Lapping materials
2. Refractory Industry
Due to its high-temperature resistance and chemical stability, WFA is a key material in refractory applications, including:
Furnace linings
Kiln furniture
Foundry molds
High-temperature insulation
3. Surface Treatment and Blasting Media
WFA is an excellent choice for sandblasting and surface preparation due to its hardness and sharpness. It is used for:
Cleaning metal surfaces
Removing rust and coatings
Etching glass and ceramics
Precision blasting in aerospace and automotive industries



4. Precision Casting and Coatings
In the investment casting industry, WFA serves as a high-quality ceramic shell material due to its purity and thermal stability. It is also used in thermal spray coatings to enhance wear resistance.
5. Electronics and Advanced Ceramics
With its electrical insulation properties and high purity, WFA is used in:
Semiconductor components
Electronic substrates
Advanced ceramic materials
Technical Specifications
WFA is available in various grades and particle sizes, tailored to specific applications. Below are typical specifications:
Property | Value |
Chemical Composition | Al₂O₃ > 99% |
Mohs Hardness | 9 |
Melting Point | ~2050°C |
Specific Gravity | 3.9 - 4.0 g/cm³ |
Bulk Density | 1.75 - 1.95 g/cm³ |
Particle Sizes | F12 - F220, P12 - P220 |
Available Forms & Packaging
- Forms:
Macro Grits (F12-F220, P12-P220)
Micro Powder (W0.5-W63)
Granular sizes for refractory applications
Packaging:
25kg bags
1-ton jumbo bags
Custom packaging available
Frequently Asked Questions
Q1: What is the difference between WFA and Tabular Alumina?
A: Tabular alumina is produced through sintering rather than fusion, resulting in a plate-like crystal structure. It has better thermal shock resistance but slightly lower hardness (8.8 Mohs).
Q2: How to prevent abrasive from caking?
A: It is recommended to store WFA at humidity levels ≤40% or choose surface-treated grades with silane coupling agents (such as WFA-6H) to improve anti-caking performance.
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