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Black Fused Alumina Abrasive Materials
Black Fused Alumina is a high-performance abrasive material with exceptional hardness and durability, widely used for grinding, cutting, and surface finishing applications.
- High Hardness: Possessing excellent hardness, it performs exceptionally well in grinding and polishing applications.
- Strong Wear Resistance: Exhibiting outstanding wear resistance, it is suitable for prolonged, high-intensity grinding tasks.
- Wide Application: Applicable in various fields such as metal grinding, polishing, and surface treatment.
- Cutting Performance: Featuring good cutting performance, it is suitable for precision cutting operations with high material requirements.
CATEGORY: Dense Fused Alumina (DFA)
DESCRIPTION
Black Fused Alumina Introduction:
Black fused alumina, also known as black aluminum oxide or black fused corundum, is an abrasive material developed later than conventional corundum. It is a dark gray crystalline substance, melted in electric arc furnaces using bauxite as its raw material, similar to brown fused alumina. Characterized by a lower Al2O3 content and a certain amount of Fe2O3 (approximately 10%), it exhibits moderate hardness, high toughness, high-temperature resistance, and stable thermal stability.
Primarily suited for free grinding applications, such as coarse grinding prior to electroplating processes, it is mainly employed for polishing and sandblasting stainless steel, fabricated metal products, and optical glass. Additionally, it serves as a new abrasive material for manufacturing resin grinding wheels, cut-off wheels, and emery cloth. With strong cutting power, high toughness, flexibility, excellent abrasion resistance, and high working efficiency, black fused alumina stands out as the optimal choice for grinding, polishing, and sandblasting stainless steel products.
Black Fused Alumina Chemical Analysis:
| Specification | Main Chemical Composition % | |||
| Al2O3 | Fe2O3 | SiO2 | TiO2 | |
| BA—1 | 81-85 | 6-9 | 5-8 | 2-4 |
| BA—2 | 75-80 | 9-12 | 8-10 | 4- |
Black Fused Alumina Physical Properties:
| Properties | Description |
| Color | Black |
| Crystal | Trigonal system |
| Hardness (Mohs) | ≥ 9.0 |
| Melting point (°C) | 2050 |
| The max working temperature (°C) | 1850 |
| True Density (g/cm3) | ≥ 3. 50 |
| Linear expansion coefficient (0-1600 °C) | 7-9 |
Black Fused Alumina Applications:
- Metal Grinding and Polishing:
- Black Fused Alumina is widely used for effective material removal and surface finishing in both ferrous and non-ferrous metal grinding and polishing applications.
- Surface Preparation and Sandblasting:
- Applied in surface preparation processes, including cleaning and conditioning surfaces before coating or bonding. Additionally, it excels in sandblasting applications for deburring, texturing, and cleaning various materials.
- Manufacturing Abrasive Tools:
- Plays a key role in the production of resin grinding wheels, cut-off wheels, and emery cloth, contributing to the creation of durable and efficient abrasive tools.
- Specialized Polishing Applications:
- Specifically suited for polishing stainless steel, fabricated metal products, and optical glass, Black Fused Alumina provides the optimal balance of hardness and flexibility for achieving high-quality finishing results.
Black Fused Alumina Packaging:
1M/T woven bag or 25kg woven bag/paper bag.
Packaging can be OEM customized.