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Thermal Conductive Diamond Powder

Advanced Thermal Management Solutions with Diamond Powder Technology

Engineered Diamond Powders for Superior Thermal Conductivity

With the advancement of science and technology, diamond powder as a supermaterial is being increasingly applied in acoustic, optical, electronic, and thermal fields.

Diamond combines extreme hardness, ultra-wide bandgap, broad optical transparency, exceptional thermal conductivity, and chemical inertness. These advantages enable stable performance under high temperature, high pressure, and high frequency conditions.

In thermal management, diamond outperforms all other materials, with a room-temperature thermal conductivity of 2000 to 2200 W/m·K, which is much higher than that of SiC, Si, GaAs, copper, or silver. It is the preferred material for heat spreaders, coatings, and cooling solutions in high-power electronics, 5G devices, and semiconductor applications.

Boron Dope Diamond Powder

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Characteristic: Boron doped diamond incorporates boron atoms into the diamond crystal structure, enhancing its physical and electrochemical properties. It offers a wide electrochemical potential window, high thermal resistance, chemical inertness, exceptional wear and impact resistance, and biocompatibility. These features make it durable and reliable in harsh and demanding environments.

Application：Used as electrode material in sensors, biosensors, and wastewater treatment, performing well in corrosive, high-temperature, and biological conditions.

Size： 250nm~400um

Spherical Thermal Conductive Diamond

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Characteristic: Spherical diamond features a regular spherical or near-spherical shape with high specific surface area. It offers good adsorption, easy filling, and uniform dispersion in composites, reducing voids and interfacial thermal resistance. The shape also improves contact area and bonding strength with the matrix, enhancing overall heat transfer.
Application：Widely used as a thermal management material in diamond/copper and diamond/aluminium heat sinks to boost thermal conductivity. Also serves as an additive or filler in high thermal conductivity epoxy, silicone, and resin composites.

Size： 20um~600um

Etched Thermal Conductive Diamond

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Characteristic: Etched thermal conductive diamond features a modified surface with improved morphology and bonding. It maintains ultra-high thermal conductivity, reduces surface defects, and enhances adhesion — achieving lower interfacial resistance and better heat transfer.
Application：Used in high-power electronics, 5G devices, LEDs, and advanced thermal interface materials (TIMs), as well as in metal matrix composites and microchannel coolers, where efficient and reliable heat dissipation is essential.

Size： 30um~540um

Thermal Conductive Single Crystal Diamond

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Characteristic: Extremely low internal impurity content, excellent thermal stability, minimal lattice defects, high hardness, and outstanding wear resistance. Its surface is treated with high-purity purification to enhance thermal interface performance, achieving low interfacial thermal resistance and high thermal conductivity and ideal for advanced thermal management applications.
Application：Suitable for high-end thermal interface materials (TIMs) in electronics, optoelectronics, and high-power devices, where efficient heat dissipation is critical.

Size： 20um~600um

Thermal Conductive Micron Diamond Powder

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Characteristic: Micron- and nano-scale thermal conductive diamond powder with narrow particle size, good morphology, and high purity. Few internal defects and excellent thermal conductivity, dispersing evenly in various matrices as a functional filler.
Application：Used in thermal interface materials like grease, adhesives, and pads. Also suitable for polymers, resins, and composites requiring high thermal conductivity and stable dispersion.

Size： 50nm~50um

Your Trusted Thermal Conductive Diamond Powder Supplier

At Crownkyn, we focus on delivering thermal conductive diamond powder tailored to your heat management and material processing needs. Featuring high thermal conductivity, excellent purity, and uniform particle distribution, it ensures efficient heat dissipation and stable performance. Ideal for thermal interface materials, polymer composites, and electronic packaging applications, our product offers consistent quality and reliable support for your production line.

Tailored Crushed Diamond Powder Solutions

Customised Particle Size and Grade Range: Offered in precisely controlled particle sizes and grades to meet your specific needs in thermal management and advanced composite applications.
Excellent Thermal Conductivity: Produced from high-purity synthetic diamond to deliver superior heat dissipation and stable thermal performance under demanding conditions.
Wide Application Suitability: Ideal for thermal interface materials, polymer composites, and electronic packaging, supporting diverse industrial requirements.
Reliable Quality Assurance: Strict control of purity, particle size distribution, and morphology ensures consistent performance and dependable supply for every batch.
Optional Surface Modification: For enhanced dispersion or stronger bonding in your formulations, surface-treated options are available to maximise thermal conductivity and compatibility with your materials.

Work with our technical team to select the optimal particle size, grade, and surface treatment for your thermal management and composite material applications. Suitable for thermal interface materials, polymer composites, and electronic packaging, our powders deliver excellent heat dissipation, stable quality, and reliable performance for your production.
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Why Choose Thermal Conductive Diamond from Crownkyn

At Crownkyn, we understand that every thermal management application requires the right diamond solution. Our thermal conductive diamond powder is manufactured with high purity, tailored particle sizes, and optional surface treatments to suit your materials and performance requirements. Rely on us for consistent quality, technical support, and reliable thermal performance in your production.

Factory-Direct Expertise

With our own dedicated production facility, we eliminate intermediaries, enabling faster lead times, tailored solutions, and responsive technical support within 24 hours.

Competitive & Transparent Supply

Our direct-from-factory model offers high-purity thermal conductive diamond powder at competitive rates, trusted by manufacturers and material suppliers in over 40 countries, with an 85% repeat order rate.

Stable Quality You Can Rely On

We control every step of production, from synthetic diamond selection through precise grading and surface treatment, to ensure consistent thermal conductivity, purity, and performance in every batch.

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Frequently Asked Question

Free samples of synthetic diamond powder or CBN powder about 50cts can be provided for quality test. Sample preparation typically takes 3–5 working days, and international delivery is about 7 days by air.
we can provide analysis reports upon request. These may include particle size distribution（PSD）, crystal morphology, purity, magnetic content, and thermal stability, especially important for high-performance products.
Pricing depends on product type (diamond or CBN), grit size, and application. MOQ usually starts from 1kg (5000ct). Volume discounts are available for bulk orders or long-term partnerships.
Standard delivery time is 7–15 working days after confirming the order. We maintain stock for regular grades and can prioritize production to support urgent requirements when needed.
All products are packed in sealed, anti-static, moisture-proof PE bags, or PE bottles and sealed in shock-proof cartons. And all packaging complies with international transport regulations.
Absolutely. We support customized coatings (e.g., Ti, Ni, Cu) and tailor-made diamond powder and CBN powder to match different bonding systems and tool applications.
We provide a full set of export documents including Certificate of Origin, MSDS, Packing List, and Commercial Invoice. Specific documents can be arranged based on your destination country’s requirements.
We commonly offer air freight. Logistics can be handled by our team or your nominated forwarder, depending on your preference.
Yes. Our production facilities ensure stable monthly output, supported by ISO-standardized quality control. We are able to meet ongoing demands and scale production for long-term cooperation.
In case of verified quality issues, we offer free replacement or return. All related costs including shipping are covered by us. We prioritize long-term trust and transparency with our clients.
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Thermal Conductive Diamond Powder
The Comprehensive Guide (2024)

This guide explores the versatility of Crownkyn’s thermal conductive diamond powders for applications in thermal management, composite materials, and electronic packaging. Whether you require high-purity diamond powder, customised particle sizes and grades, or surface-treated options for improved dispersion and bonding, we provide the insights to help you select the right product for your specific thermal requirements. Crownkyn delivers stable quality and reliable performance to support both your production and supply chain goals.

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What is Thermal Conductive Diamond Powder?

Thermal conductive diamond powder is high-purity synthetic diamond with exceptional heat conductivity, tailored for thermal management applications. It combines outstanding thermal conductivity with electrical insulation, enabling efficient heat dissipation while maintaining material integrity. Available in various particle sizes, grades, and optional surface treatments, it integrates seamlessly into polymers, resins, metals, and composites.
At Crownkyn Diamond, we focus on producing premium thermal conductive diamond powders with controlled purity, uniform particle size distribution, and consistent performance. Our customised solutions and technical expertise help manufacturers of thermal interface materials, electronic packaging, and composite components optimise their designs and enhance product reliability, efficiency, and service life.

Key Features and Advantages

Thermal conductive diamond powder delivers exceptional heat dissipation, reliable thermal stability, and excellent electrical insulation. Its high-purity particles provide superior thermal conductivity, helping to reduce thermal resistance and enhance the performance of thermal interface materials and composites. Customisable particle sizes and surface treatments ensure uniform dispersion, strong bonding within the matrix, and consistent, dependable results across diverse thermal management applications.

Exceptional Thermal Conductivity

High-purity synthetic diamond ensures outstanding heat dissipation, reducing thermal resistance and improving the reliability of thermal interface materials and composites.

Electrical Insulation

Diamond’s natural insulation enables efficient heat transfer without affecting electrical properties of sensitive components.

Stable Performance at Elevated Temperatures

Optional surface treatments enhance dispersion and bonding, maintaining consistent thermal performance even under demanding thermal cycling and high-temperature conditions.

Consistent Quality and Purity

Tight process control guarantees uniform particle size distribution, stable morphology, and reliable thermal conductivity from batch to batch.

Versatility in Applications

Compatible with polymers, resins, metals, and ceramic composites, thermal conductive diamond powder is ideal for use in TIMs, electronic packaging, and high-performance composites.

Material Compatibility and Integration

Thermal conductive diamond powder integrates well with polymers, resins, metals, and ceramics. Its uniform size, high purity, and optional surface treatments ensure good dispersion, strong bonding, and efficient heat transfer, improving the overall performance of thermal management materials.
Broad Matrix Compatibility
Thermal conductive diamond powder is designed to blend uniformly into a wide range of materials, including polymers, resins, metals, and ceramics. Its controlled particle size and high purity minimise agglomeration, ensuring even dispersion throughout the matrix.
Enhanced Interfacial Bonding
Optional surface treatments improve the interaction between diamond particles and the host material, promoting strong bonding and stable interfaces. This helps form continuous thermal pathways and reduces thermal resistance in the final product.
Optimised Composite Performance
By integrating seamlessly into different matrices, the powder enhances the overall thermal conductivity, electrical insulation, and mechanical integrity of composites, supporting the production of reliable and efficient thermal management components.
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Bonding and Dispersion Characteristics

Thermal conductive diamond powder combines uniform dispersion and strong interfacial bonding to create efficient thermal pathways within composites. Its controlled particle size, high purity, and optional surface treatments ensure stable integration with various matrices, delivering consistent thermal performance and mechanical reliability.
Homogeneous Dispersion
Narrow particle size distribution and excellent morphology enable uniform dispersion throughout the matrix, preventing clustering and ensuring effective thermal pathways.
Enhanced Interfacial Bonding
Optional surface modifications improve chemical compatibility and adhesion between diamond and the host material, reducing interfacial thermal resistance.
Stable Composite Structure
Strong bonding and even distribution help maintain the structural integrity of composites under thermal cycling and mechanical stress.
Optimised Heat Transfer Efficiency
Proper dispersion and robust interfaces facilitate continuous, low-resistance thermal conduction, maximising the material’s heat dissipation capabilities.

Typical Applications Across Industries

Thermal conductive diamond powder is widely used across industries to enhance heat dissipation and improve the reliability of thermal management solutions. Its excellent thermal conductivity, electrical insulation, and compatibility with diverse materials make it an ideal choice for electronic packaging, composites, and advanced thermal interface materials.
  • Thermal Interface Materials (TIMs): Used as a high-performance filler in thermal grease, pads, and adhesives to enhance heat transfer and maintain electrical insulation in electronic devices and power modules.

  • Electronic Packaging: Improves thermal conductivity of encapsulants, underfills, and potting compounds, helping dissipate heat from semiconductors and extend component lifespan.

  • Polymer and Resin Composites: Blended into plastics, epoxies, and composites to create lightweight materials with excellent thermal conductivity for housings, connectors, and heat spreaders.

  • Ceramic and Metal Matrix Composites: Incorporated into ceramic or metal matrices to form high-thermal-conductivity structural parts used in aerospace, automotive, and high-power electronics.

  • Advanced Thermal Management Systems: Applied in customised solutions for high-reliability thermal management applications, such as LED cooling, communication equipment, and energy storage systems.
With high purity, uniform particle morphology, and excellent compatibility with diverse matrix materials, Crownkyn’s thermal conductive diamond powder helps manufacturers create efficient, reliable thermal management solutions across a wide range of industries.

How to Select the Right Thermal Conductive Diamond

STEP 1

Define the Matrix Material

Consider the type of matrix you are working with polymers, resins, metals, or ceramics to select the most compatible grade and surface treatment for optimal dispersion and bonding.

STEP 2

Select the Appropriate Particle Size

Choose particle size based on your application: finer powders for thermal interface materials like grease and pads, and larger particles for composites or structural components.
STEP 3

Choose the Grade and Purity Level

Higher-purity grades with minimal defects are ideal for applications requiring maximum thermal conductivity and electrical insulation.
STEP 4

Decide on Surface Treatment

Surface-treated powders improve adhesion, dispersion, and integration with the host material. Options include customised treatments tailored to your matrix and processing method.

STEP 5

Consult Technical Experts

Select the appropriate diamond powder based on the material you are processing, such as stone, ceramics, hard alloys, glass or gemstones, to ensure optimal cutting performance and extended tool life.

Quality Control and Batch Consistency

At Crownkyn, we prioritise consistency and quality across every batch of thermal conductive diamond powder to ensure stable performance in your production.

Precise Grading Control: Each batch is graded using laser particle size analysis and microscopy to ensure a narrow particle size distribution and uniform morphology for reliable dispersion and consistent thermal performance.


High Purity Assurance: Advanced ICP and XRF techniques are employed to detect and minimise trace impurities, ensuring excellent material purity and reducing the risk of contamination in sensitive thermal management applications.


Stable Crystal Integrity: SEM and optical inspections monitor crystal quality and morphology to minimise internal defects and maximise thermal conductivity and structural stability.


Consistent Batch Quality: Every lot undergoes rigorous inspection, sample testing, and documentation to guarantee uniform performance, helping you achieve stable processing and reliable end-product quality.

Sample Testing and Performance Validation

At Crownkyn, we know the performance of your diamond tools and precision processes relies on consistent, high-quality diamond powder. Please follow these packaging, handling, and storage guidelines to maintain product integrity from delivery to application.
Custom Sample Preparation
We provide tailored sample quantities with your specified particle size, grade, and optional surface treatment to suit your matrix material and thermal application.
Application-Based Testing
Assess our thermal conductive diamond powder in your actual processes or via third-party testing to evaluate thermal conductivity, dispersion quality, and material compatibility under real operating conditions.
Technical Support Service
Our technical team assists in analysing test data, recommending adjustments, and optimising specifications to achieve the best thermal performance and process efficiency.
Performance Feedback Loop
Your feedback helps us refine particle size distribution, grade, and surface treatment, ensuring consistent dispersion, stable bonding, and reliable heat dissipation in your end products.

Packaging, Handling, and Storage Recommendations

Packaging

  • Moisture-proof, anti-static containers
  • Sealed bottles or vacuum foil bags
  • Outer cartons for transport protection
  • Custom packaging on request

Handling

  • Use clean, dry tools to avoid introducing moisture or impurities
  • Minimise exposure to air to reduce moisture absorption
  • Wear masks and gloves to prevent dust inhalation and ensure safety

Storage

  • Store in a cool, dry, and well-ventilated area, away from sunlight
  • Avoid high humidity and extreme temperatures to maintain performance
  • Keep containers sealed until use to ensure consistent quality
The Author
Ashley Wei
Hey, I’m Ashley Wei, the sales engineer of crownkundiamond.com Family-run business.
An expert of agriculture protection textile specialist.
In the past 26 years, we’ve supported 100+ clients across 35 countries, including diamond tools manufacturers and synthetic diamond powder distributors to significantly enhance their product quality and efficiency. The purpose of article is to share insights on advanced abrasive solutions, helping you produce higher quality diamond tools with improved performance and durability.
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Henan Crownkyn Superhard Materials Co.,Ltd.
  • +86 16692180413
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