Brown Aluminum Oxide
High toughness fused alumina for bonded & coated abrasives and refractories.
Brown Fused Aluminum Oxide (BFA) is produced by the fusion of high-quality bauxite in an electric arc furnace at high temperatures. BFA offers high hardness, toughness, self-sharpening, heat resistance and chemical stability. It is widely used for bonded abrasives, coated abrasives, vitrified/resin grinding tools, blasting and refractories.
Send InquiryBrown Fused Aluminum Oxide — Grades
We supply standard BFA as well as heat-treated and coated grades for higher performance.
Calcined BFA
Description
Heating to about 1050°C greatly improves purity, toughness, strength and wear-resistance.
Primary Application
Vitrified grinding wheels
Blue-Fired BFA
Description
Firing at about 1350°C turns grain color dark blue and delivers greater toughness and strength, much lower iron content, very low thermal expansion and excellent hydrophilicity — improving grinding performance and accuracy.
Primary Application
Coated abrasives (paper, cloth and belts) and heavy-duty grinding wheels
Ceramic-Coated BFA
Description
Ceramic coating improves purity and hydrophilicity, reduces dust, and achieves grain surfaces with greater toughness, strength, roughness and more uniform particle size.
Primary Application
Coated and bonded abrasives
Ceramic-Coated Blue-Fired BFA
Description
Combines the advantages of ceramic-coated and blue-fired BFA for demanding grinding jobs.
Primary Application
Coated and bonded abrasives, especially for hardened steel and high-carbide materials
Brown Aluminum Oxide (Abrasive)
Grits Available
- F12 to F220, P12 to P220, #240 to #4000
- Sized in accordance with FEPA / JIS / ANSI sieve standards
- Other sizes available on request
Typical Applications
Bonded and coated abrasives, blasting, surface preparation and flooring.
| Specification | Al₂O₃ | SiO₂ | Fe₂O₃ | TiO₂ |
|---|---|---|---|---|
| BFA-Resin | 95.5 ± 0.5% | ≤ 1.5% | ≤ 0.30% | 2.0~3.5% |
| BFA-Vitrified | 95.0 ± 0.5% | ≤ 1.0% | ≤ 0.30% | 2.2~3.5% |
| Property | Value |
|---|---|
| Principal Crystalline Phase | α-Al₂O₃ |
| Crystal Color | Brown |
| Specific Gravity (H₂O = 1) | ≥ 3.90 |
| Mohs Hardness | ≥ 9.00 |
| Micro Hardness | HV 1800-2200 |
Brown Fused Alumina (Refractory)
Grits Available
- mm: 0-0.5, 0-1, 1-3, 3-5, 5-8, 0-10, 0-25, 0-30
- Mesh: -100, -200, -325
- Other sizes available on request
Typical Applications
Shaped and unshaped refractories, fireproof products and linings.
| Index | First Grade | Special Grade |
|---|---|---|
| Al₂O₃ | ≥ 94% | ≥ 95% |
| Fe₂O₃ | ≤ 0.3% | ≤ 0.2% |
| SiO₂ | ≤ 1.8% | ≤ 1.0% |
| TiO₂ | ≤ 3.5% | ≤ 3.0% |
| Property | Value |
|---|---|
| Crystal Color | Brown |
| Refractoriness | 1980°C min |
| Melting Temperature | 2050°C min |
| Specific Gravity (H₂O = 1) | ≥ 3.90 |
| Mohs Hardness | ≥ 9.00 |
Packing Available
We can provide various kinds of packing
- 1MT big bags
- 25kg × 40 PP bags into 1MT big bags
- 25kg × 40 PP bags on Standard wood pallet or Euro-pallet
- 25kg × 40 craft paper bags on Standard wood pallet or Euro-pallet
- Custom packing available on request (marks, labels, etc.)
Important: The technical data herein is believed to be accurate. It is offered for your consideration, investigation and verification. Buyer assumes all risk of use, storage and handling of the product.