Black silicon carbide powder is widely used in polishing and lapping due to its high hardness (Mohs 9.1-9.3), sharp edges, and excellent thermal stability. It is particularly effective for metals, ceramics, glass, stone, and composite materials.
Key Properties for Polishing
High Hardness – Efficient material removal
Sharp, Angular Grains – Provides a consistent cutting action
Thermal & Chemical Resistance – Suitable for wet or dry polishing
Controlled Particle Sizes – Available in fine to coarse grits (FEPA, JIS, or micron grades)
Common Polishing Applications
Metal Polishing
Deburring and finishing of stainless steel, titanium, aluminum, and cast iron.
Used in vibratory tumblers, abrasive pastes, and buffing compounds.
Stone & Concrete Polishing
Granite, marble, and engineered stone polishing.
Used in resin-bonded grinding wheels and polishing pads.
Glass & Ceramics Finishing
Edge grinding and surface polishing of optical glass, LCD screens, and technical ceramics.
Lapping & Precision Finishing
Used in lapping compounds for achieving ultra-smooth surfaces on seals, bearings, and valves.
Grit Sizes for Polishing (Common Standards)
| Grit Size (FEPA) | Avg. Particle Size (µm) | Typical Use |
|---|---|---|
| F220 | 53 – 63 | Rough polishing |
| F320 | 29 – 37 | Medium polishing |
| F400 | 17 – 23 | Fine finishing |
| F600 | 9 – 13 | Precision polishing |
| F800-F1200 | 6 – 9 | Ultra-fine finishing |
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