White Fused Alumina | High-Purity Aluminum Oxide Abrasive & Refractory Material

  • High Purity: Over 99% Al₂O₃ for reliable performance.

  • Extreme Hardness: Mohs 9 ensures superior abrasive strength.

  • Thermal Stability: Withstands temperatures up to ~2050°C.

  • Chemical Resistance: Resistant to acids, alkalis, and oxidation.

  • 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

white fused alumina-Sandblasting-for-metal

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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  • For inquiries, pricing, or sample requests, contact us today!

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