Product Specification: Iridium-Coated Alundum (Coated Brown Fused Alumina )
1. Product Overview
Iridium-Coated Alundum is a high-performance modified abrasive developed from premium White Fused Alumina (WFA) or Brown Fused Alumina (BFA). Through advanced high-temperature coating technology, a layer of Iridium-based composite material (typically Iridium Oxide) is deposited onto the surface of the abrasive grains. This process creates a "soft coating" on the grain surface, fundamentally enhancing the traditional characteristics of the abrasives media.
2. Key Characteristics
* Appearance: Red, Yellow, or White (depending on the base grain and coating process).
* Base Material: High-purity White or Brown Fused Alumina.
* Coating Composition: Metal Iridium and Iridium Oxide composite layer.
* Hardness: High micro-hardness (increased by approx. 10% compared to standard grains).
* Toughness: Significantly improved (increased by approx. 10%), reducing grain breakage.
* Surface Texture: The coating process creates a rougher surface morphology.
* Thermal Properties: Excellent heat dissipation capability and resistance to thermal shock.
3. Manufacturing Process
1. Selection of Base Grains: Only high-quality, sharp-edged White or Brown Fused Alumina grains are selected as the substrate.
2. Surface Activation: The grain surfaces are treated to ensure optimal adhesion of the coating.
3. High-Temperature Coating: The grains are introduced into a high-temperature reaction chamber where a metal-organic precursor is decomposed, depositing a uniform layer of Iridium/Iridium Oxide onto the grain surface.
4. Heat Treatment (Calcination): The coated grains undergo a specific calcination process. This step ensures the coating is firmly bonded to the substrate, forming a stable composite structure without altering the core properties of the abrasive.
4. Available Grades and Specifications
We offer a range of Iridium-Coated Alundum products to suit various applications:
* White Iridium-Coated Alundum: For high-precision grinding and light-colored products.
* Red/Brown Iridium-Coated Alundum: For heavy-duty grinding and cutting applications.
* Particle Sizes: Available in standard FEPA (F4 - F220) and ANSI grit sizes.
* Chemical Composition (Typical):
* Al₂O₃: 99.0% Min (Base)
* Coating (Ir/IrO₂): Controlled percentage to optimize performance.
5. Primary Applications
Grinding wheels for metalworking, woodworking, and tool sharpening.
Cutting wheels for heavy-duty and precision cutting tasks.
Mounted points and other precision bonded abrasive tools.
Sanding belts: P60-P120 grit for heavy-duty and fine-finishing tasks.
Flap discs and flap wheels: P40-P120 grit for metal polishing and surface preparation.
High-grade sandpaper: P50-P150 grit for woodworking, automotive refinishing, and other precise applications.
Non-woven abrasives: Nylon and sponge abrasives for surface finishing.
7. Packaging and Storage
* Packaging: 25kg multi-wall paper bags with moisture-proof liner. Custom packaging (e.g., 500kg/1000kg bulk bags) is available upon request.
* Storage: Store in a dry, indoor environment. Protect from moisture and direct contact with the ground.
