White fused alumina
White fused alumina is produced by electrically melting high-purity calcined alumina, delivering a brilliantly white, ultra-pure abrasive and refractory material with minimal impurities. Its exceptional purity, moderate hardness, and excellent self-sharpening properties make it the preferred choice for precision grinding, optical polishing, advanced ceramics, and contamination-sensitive refractory applications.
What Is White fused alumina?
White fused alumina — commonly referred to as white corundum — is a high-purity aluminum oxide material produced by electrically melting premium calcined alumina in an arc furnace at temperatures exceeding 2000°C. The use of high-purity raw materials and the controlled fusion process results in a brilliantly white product with an alumina content typically exceeding 99%, setting it apart from brown fused alumina and other lower-purity corundum grades.
Upon cooling and crystallization, white fused alumina forms a dense, hard corundum structure characterized by its distinctive white color — a direct indicator of its exceptional chemical purity and near-absence of iron oxide and other metallic impurities. The fused block is then crushed, sized, and classified into various grain sizes and powder grades to meet the specific requirements of abrasive, refractory, and ceramic applications across a broad range of industries.
Its combination of high purity, moderate toughness, and excellent self-sharpening behavior during grinding makes white fused alumina one of the most widely specified premium abrasive and refractory materials in global industrial markets today.
Why Choose White Fused Alumina?
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Ultra-High Purity : With alumina content consistently exceeding 99%, white fused alumina is the go-to material for contamination-sensitive applications in electronics, precision optics, biomedical ceramics, and food-grade processing equipment manufacturing.
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Excellent Self-Sharpening Properties: Its moderate toughness allows abrasive grains to fracture cleanly during use, continuously exposing fresh cutting edges — delivering cooler, more precise grinding with reduced surface burn risk on sensitive workpieces.
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Superior Surface Finish Quality: White fused alumina produces exceptionally smooth, consistent surface finishes, making it ideal for precision grinding, lapping, polishing, and finishing of hardened steels, optical glass, and advanced ceramic components.
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Outstanding Thermal Stability:Resistant to temperatures exceeding 1800°C, white fused alumina performs reliably as a refractory material in high-temperature kilns, furnaces, and thermal processing equipment where purity and heat resistance are both critical.
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Low Magnetic Content: Minimal iron and metallic impurity levels result in extremely low magnetic content, meeting strict specifications for electronic component manufacturing and other magnetically sensitive industrial processes.
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Versatile Grade Availability:Available in a wide range of grain sizes — from coarse macro grits to sub-micron powders — white fused alumina adapts readily to diverse application requirements across abrasives, refractories, and technical ceramics.
Industry Challenges About White fused alumina
High Raw Material Cost
Energy-Intensive Production
Strict Purity Maintenance
Lower Toughness Compared to Brown Fused Alumina
Grain Shape Consistency
Competitive Pressure from Advanced Abrasives
Moisture Sensitivity in Storage
Why Use Our White fused alumina
Exceptional Hardness & Wear Resistance
With a Mohs hardness of 9, white fused alumina ranks among the hardest abrasive materials available. Its superior wear resistance ensures longer tool life, reduced replacement frequency, and consistently high cutting performance across demanding industrial applications.
Precise Grain Size & Uniform Distribution
Strictly controlled crushing and grading processes ensure consistent particle size distribution. Uniform grain shape enhances surface finish quality, provides predictable abrasive performance, and meets tight tolerances required in precision grinding and polishing operations.
Low Iron Content & Minimal Contamination Risk
The white fused alumina's ultra-low iron content minimizes the risk of workpiece contamination. This makes it the preferred choice for processing stainless steel, optical glass, and other materials where surface purity and appearance are critical.
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Secure & Customizable Packaging
The products shall be enclosed in a durable, moistureproof pouch or bulk container, so as to guarantee the cleanliness and completeness of transportation. Customized packing options for special size and handling needs.
Reliable & Flexible Global Shipping
Working with reliable logistic partners, we provide a flexible delivery system for maritime, aerial and land-based cargo. Prompt delivery and safe transport to worldwide destinations.
Dedicated Order & Support Coordination
We offer special support for tracking and documenting from the order validation to the last shipment. Availability of technical and logistical support to guarantee the success of the supply chain experience.
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