Diamond Powder Selection Guide
How to select the right diamond abrasive for your application — covering diamond crystal structure, particle morphology, PSD, hardness, self-sharpening performance and more.
Selection Criteria
Different applications require different diamond abrasive characteristics. Selection should be based on:
- ✓ Crystal Structure
- ✓ Particle Morphology
- ✓ Particle Size and Distribution (PSD)
- ✓ Hardness and Toughness
- ✓ Self-Sharpening Performance
- ✓ Surface Finish Requirements
- ✓ Processing Method and Material Type
A properly selected diamond abrasive can significantly improve:
- ✓ Grinding efficiency
- ✓ Polishing consistency
- ✓ Surface quality
- ✓ Tool life
- ✓ Processing stability
| Processing Requirement | Recommended Diamond Characteristics |
|---|---|
| High-efficiency grinding and cutting | High hardness, sharp edges, excellent wear resistance |
| Precision polishing | Controlled cutting action, good self-sharpening performance |
| Ultra-precision surface finishing | Fine particle size, narrow PSD, high purity |
| Semiconductor processing | Low contamination, stable particle characteristics |
| Thermal management applications | High thermal conductivity, high sphericity, excellent dispersion |
Powder Type Overview
| Diamond Type | Crystal Structure | Main Advantages | Typical Applications |
|---|---|---|---|
| Monocrystalline Diamond Powder | Single crystal structure | High hardness, aggressive cutting performance, excellent wear resistance | Grinding tools, cutting tools, hard material processing |
| Polycrystalline Diamond Powder | Multi-crystal structure | Excellent self-sharpening ability, controlled cutting action, superior surface protection | Precision polishing, semiconductor processing |
| Nano Diamond Powder | Nano-scale diamond particles | Ultra-fine particle size, high purity, excellent dispersion | CMP, ultra-precision polishing |
| Thermal Conductive Spherical Diamond Powder | Spherical single crystal diamond | High thermal conductivity, low impurities, excellent flowability | Thermal interface materials, electronic packaging |
Monocrystalline Diamond Powder
Manufactured from high-quality synthetic diamond through controlled crushing, shaping and classification. Single crystal structure with sharp cutting edges, multi-edge morphology and strong mechanical cutting action.
Properties
| Property | Performance |
|---|---|
| Hardness | ★★★★★ |
| Cutting Ability | ★★★★★ |
| Wear Resistance | ★★★★★ |
| Self-Sharpening | ★★★☆☆ |
Standard Particle Sizes
| Application | Recommended Size |
|---|---|
| Heavy grinding | 10 – 40 μm |
| Precision grinding | 1 – 10 μm |
| Fine polishing | 0.25 – 3 μm |
Typical applications:
- ✓ Diamond wheels, cutting tools, grinding tools
- ✓ Cemented carbide, ceramics, sapphire
- ✓ Non-ferrous metals, engineering materials
Best for:
- ✓ High material removal rate
- ✓ Strong cutting performance
- ✓ Long abrasive life
Polycrystalline Diamond Powder
Multi-crystal structure combining nano-scale diamond crystals into a complex shape. During grinding, the particles continuously generate new cutting edges, providing excellent self-sharpening performance.
Properties
| Property | Performance |
|---|---|
| Cutting Ability | ★★★★☆ |
| Self-Sharpening | ★★★★★ |
| Surface Protection | ★★★★★ |
| Polishing Stability | ★★★★★ |
Standard Particle Sizes
| Application | Recommended Size |
|---|---|
| Precision grinding | 1 – 10 μm |
| Optical polishing | 0.25 – 3 μm |
| Ultra-precision polishing | 0.1 – 1 μm |
Typical applications:
- ✓ Silicon wafers, sapphire substrates, SiC wafers
- ✓ Optical glass, quartz, crystal materials
- ✓ Zirconia, alumina
Ideal for:
- ✓ Low scratch generation
- ✓ High surface finish
- ✓ Excellent polishing consistency
Nano Diamond Powder
Produced through advanced synthesis and purification processes. Ultra-fine particles deliver high purity and excellent dispersion stability for ultra-precision polishing.
Properties
| Property | Performance |
|---|---|
| Particle Size Control | ★★★★★ |
| Purity | ★★★★★ |
| Dispersion Performance | ★★★★★ |
| Precision Processing Capability | ★★★★★ |
Standard Particle Size
50 nm – 200 nm
Typical applications:
- ✓ Semiconductor CMP polishing
- ✓ Optical components
- ✓ Precision ceramics
- ✓ Advanced materials
- ✓ Functional composite materials
Thermal Conductive Spherical Diamond Powder
Produced from premium monocrystalline diamond through specialised rounding treatment, giving particles a near-spherical morphology with narrow size distribution, excellent flowability and high thermal conductivity.
Properties
| Property | Performance |
|---|---|
| Thermal Conductivity | ★★★★★ |
| Sphericity | ★★★★★ |
| Dispersion | ★★★★★ |
| Purity | ★★★★★ |
Particle Size Range
1 μm – 100 μm
Typical applications:
- ✓ Diamond heat spreaders
- ✓ Thermal interface materials
- ✓ Electronic packaging
- ✓ High-power semiconductor cooling
Quick Selection Guide
| Application Requirement | Recommended Diamond Powder |
|---|---|
| High-efficiency grinding | Monocrystalline Diamond |
| Fast material removal | Monocrystalline Diamond |
| Precision polishing | Polycrystalline Diamond |
| Low-scratch surface finishing | Polycrystalline Diamond |
| Semiconductor CMP | Nano Diamond / Polycrystalline Diamond |
| Ultra-precision optical finishing | Polycrystalline Diamond |
| Thermal management materials | Spherical Diamond |
Particle Size Selection
Particle size directly affects the balance between material removal rate, surface roughness and processing precision.
| Processing Objective | Recommended Particle Size |
|---|---|
| High removal efficiency | 10 – 40 μm |
| Balanced grinding performance | 1 – 10 μm |
| Precision polishing | 0.1 – 3 μm |
| Ultra-precision processing | 50 – 500 nm |
Selection by Processing Goal
| Goal | Choose | Advantages |
|---|---|---|
| High-efficiency machining | Monocrystalline Diamond Powder | ✓ Strong cutting ability ✓ High wear resistance ✓ High processing efficiency |
| High surface quality finishing | Polycrystalline Diamond Powder | ✓ Excellent self-sharpening performance ✓ Reduced surface scratches ✓ Better polishing consistency |
| Nano-level precision processing | Nano Diamond Powder | ✓ Ultra-fine particle size ✓ High purity ✓ Excellent dispersion capability |
| Thermal management applications | Spherical Diamond Powder | ✓ High thermal conductivity ✓ High filling efficiency ✓ Excellent material compatibility |
Technical Support
Yuansu Diamond provides standard diamond powder products plus customised abrasive solutions based on specific application requirements.
Available technical documents:
- ✓ PSD Report (Particle Size Distribution Report)
- ✓ TDS (Technical Data Sheet)
- ✓ SDS (Safety Data Sheet)
- ✓ Quality Inspection Report
Our technical support includes:
- ✓ Particle size optimisation
- ✓ PSD customisation
- ✓ Application matching
- ✓ Processing condition recommendations
- ✓ Technical documentation support
Need help selecting the right diamond powder?
Our technical team can identify the most suitable diamond abrasive solution based on your material type, processing method, surface finish requirements and productivity targets. Contact Yuansu Diamond for professional diamond powder selection support.