Synthetic Diamond Powder
| Color: Yellow / Green | Shape: Regular / Irregular |
| Mesh Size: 20/25 – 500/600 (0.25 – 50 micron) | |
Product Overview
Synthetic diamond powder, also known as diamond micropowder or diamond abrasive powder, is produced from high-quality HPHT (High Pressure High Temperature) synthetic diamond crystals through a precise crushing, shaping, and classification process. With a hardness of 10 on the Mohs scale — the hardest known material — diamond powder delivers unmatched cutting efficiency, wear resistance, and surface finish quality across a wide range of industrial applications.
Our diamond powder is manufactured under strict quality control with consistent particle size distribution, high purity, and excellent thermal stability. It is available in two color grades (yellow and green) and two crystal shapes (regular and irregular), covering mesh sizes from 20/25 down to 500/600 and micron sizes from 0.25μm to 50μm.
Key Applications
Synthetic diamond powder is a critical raw material for the tooling and precision processing industries. The following are its primary application areas:
Grinding Tools
Diamond powder is the core abrasive component in resin-bond, metal-bond, and vitrified-bond grinding wheels. These wheels are used for grinding hard materials such as tungsten carbide, ceramics, optical glass, gemstones, silicon wafers, and ferrite magnets. The choice of diamond powder particle size directly affects stock removal rate and final surface roughness.
Saw Blades & Cutting Tools
Used as the abrasive segment material in diamond circular saw blades, wire saws, and band saws for cutting stone, concrete, asphalt, ceramics, and glass. Coarser mesh sizes (20/25–60/70) are typically preferred for high material removal rates in stone and concrete cutting, while finer grades are used for precision cutting applications.
Lapping & Polishing
Micron-grade diamond powder (0.25–50μm) is essential for high-precision lapping and polishing processes. Applications include polishing of LED substrates (sapphire, silicon carbide), semiconductor wafers, optical lenses, precision ceramic components, and gemstone faceting. Diamond lapping compounds and suspensions formulated with our micropowder achieve surface finishes down to nanometer-level roughness.
Electroplated Diamond Tools
Diamond powder is electroplated onto metal substrates to produce diamond files, burrs, grinding pins, core drills, and profile wheels. These single-layer diamond tools are widely used in mold making, dental laboratories, glass edging, and composite material processing. Both regular and irregular crystal shapes are used, depending on the required cutting aggressiveness and tool life.
Diamond Pastes & Slurries
Fine micron diamond powder is dispersed into oil-based or water-based carriers to create diamond pastes and slurries. These are used for mold polishing, metallographic sample preparation, wire drawing die finishing, and high-precision surface treatment of aerospace and medical components.
PCD & Composite Materials
Diamond micropowder serves as the raw material for Polycrystalline Diamond (PCD) blanks and diamond-impregnated composite materials. PCD blanks are sintered under high pressure and temperature, then used to make cutting tools for non-ferrous metals, wood composites, and abrasive materials.
Product Specifications
| Specification | Details |
|---|---|
| Material | HPHT synthetic diamond (single crystal) |
| Color | Yellow (higher toughness, impact-resistant) / Green (more friable, self-sharpening) |
| Crystal Shape | Regular (well-defined crystal faces) / Irregular (multi-cutting-edge morphology) |
| Mesh Size Range | 20/25, 25/30, 30/35, 35/40, 40/45, 45/50, 50/60, 60/70, 70/80, 80/100, 100/120, 120/140, 140/170, 170/200, 200/230, 230/270, 270/325, 325/400, 400/500, 500/600 |
| Micron Size Range | W0.25, W0.5, W1, W1.5, W2.5, W3.5, W5, W7, W10, W14, W20, W28, W40, W50 (approximately 0.25μm – 50μm) |
| Particle Shape (Micron) | Blocky / Angular — depending on application requirements |
| Hardness | Mohs 10 (hardest known material) |
| Packaging | Standard: 100g / 500g / 1kg per bottle or bag. Custom packaging available on request. |
How to Choose the Right Diamond Powder
Yellow vs. Green Diamond Powder
Yellow diamond powder contains higher levels of nitrogen impurities, which result in greater crystal toughness and impact resistance. It is the preferred choice for heavy-duty grinding applications where the abrasive is subjected to high mechanical loads — such as metal-bond grinding wheels for stone processing and saw blade segments for concrete cutting.
Green diamond powder has lower impurity content and a more friable crystal structure. It fractures more readily under stress, continuously exposing fresh, sharp cutting edges. This self-sharpening characteristic makes green diamond powder ideal for precision applications, including resin-bond grinding wheels for carbide tool sharpening, optical glass polishing, and fine lapping compounds.
Regular vs. Irregular Crystal Shape
Regular (crystalline) shape diamond particles have well-defined crystal faces and edges. They provide controlled, uniform cutting action and are typically specified for resin-bond tools where consistent wear behavior is important. The smooth crystal faces allow for better retention in softer bond matrices.
Irregular shape diamond particles feature a rough, multi-edged surface morphology created through controlled crushing. The increased number of cutting points and mechanical interlocking with the bond matrix make irregular-shaped powder the go-to choice for metal-bond tools, electroplated tools, and applications requiring aggressive cutting action and maximum bond retention.
Mesh Size vs. Micron Size
Mesh size (e.g., 140/170) designates particle size ranges by sieving through screens with a defined number of openings per linear inch. A larger mesh number indicates finer particles. Mesh size grades are typically used for grinding wheels, saw blades, and electroplated tools where the abrasive layer thickness dictates the suitable particle size.
Micron size (e.g., W5, W10, W20) designates the actual particle diameter in micrometers (μm). Micron-grade diamond powder is classified by sedimentation or laser diffraction methods rather than sieving, ensuring precise particle size control. These grades are essential for lapping, polishing, and PCD manufacturing, where sub-micron accuracy directly determines the final surface quality.
Quality Assurance
Every batch of our diamond powder undergoes rigorous quality testing to ensure consistency and reliability:
- Particle size distribution analysis by laser diffraction or electrical sensing zone method, ensuring conformance to FEPA or ANSI standards
- Particle shape inspection by optical microscopy to verify crystal morphology
- Purity verification to confirm minimal metallic and non-metallic contamination
- Impact strength (TI/TTI) testing for coarse mesh grades used in high-load applications
- Bulk density measurement for consistent tool formulation
We supply diamond powder in standard or custom packaging, with global shipping and reliable lead times. For bulk orders or specific particle size requirements, please contact us to discuss your needs.
Frequently Asked Questions
What grit size of diamond powder do I need for my application?
The appropriate grit size depends on your specific process. For rough grinding and high stock removal, coarser mesh sizes (20/25–80/100) are recommended. For medium grinding, use 100/120–230/270. For fine grinding and pre-polishing, 270/325–500/600 mesh is suitable. For final polishing and lapping, micron-grade powder (0.25–28μm) provides the finest surface finish. If you are unsure, please share your application details and we can recommend the optimal grade.
What is the difference between mesh and micron diamond powder?
Mesh size refers to the number of screen openings per linear inch used to sieve and classify diamond particles. It is the conventional standard for coarser diamond abrasives used in grinding wheels, saw blades, and electroplated tools. Micron size refers to the actual particle diameter measured in micrometers (μm), classified by sedimentation or laser diffraction. Micron-grade powder provides tighter size control and is used for precision lapping, polishing, and PCD manufacturing.
Can you customize particle size distribution?
Yes. In addition to standard FEPA mesh and micron grades, we can produce custom particle size distributions to meet specific application requirements. Contact us with your target size range and tolerance.
Do you provide samples for testing?
Yes, we offer small-quantity samples for customer evaluation and process qualification. Sample availability varies by specification. Please reach out to us with your requirements.
What packaging options are available?
Standard packaging includes sealed plastic bottles or bags in 100g, 500g, and 1kg quantities. For bulk orders, vacuum-sealed bags or custom packaging can be arranged. All packaging is clearly labeled with product specification, batch number, and net weight for traceability.
