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Thermal Materials

Thermal Conductive Fillers for Interface Materials and Coatings

Guide to boron nitride, alumina, aluminum nitride and dispersions for thermal interface materials and heat dissipation coatings.

Feb 19, 2026Thermal Materials

Thermal interface materials and heat dissipation coatings depend on filler selection, particle size, surface compatibility and loading level. Sourcing should begin with the target thermal and processing window.

Common filler options

Hexagonal boron nitride, boron nitride nanosheets, spherical alumina and aluminum nitride powder are common thermal filler routes. Each material offers a different balance of thermal conductivity, processability and cost structure.

Alumina dispersions can support coating routes where ready-to-evaluate dispersion format is preferred.

Specification details to confirm

Particle size distribution, morphology, surface chemistry, purity, moisture and compatibility with resin systems are important specification points.

For high filler loading, spherical morphology and surface modification may influence viscosity and process stability.

Sample and pilot sourcing

Small packs are useful for comparing filler loading levels and processing behavior before scale-up. Buyers should request the same grade reference when moving from sample to pilot quantity.

Shipping feasibility should be reviewed with SDS and destination information before quote confirmation.

FAQ

Which filler has the highest thermal conductivity?

The practical result depends on filler type, grade, loading, matrix compatibility and processing, so evaluation should be application-specific.

Can surface modified fillers be sourced?

Yes. Surface modified boron nitride and other treated fillers can be reviewed based on resin compatibility needs.

What information helps thermal filler sourcing?

Share target thermal conductivity, resin system, particle size preference, loading range, quantity and destination country.

Review thermal filler options

Send your resin system, thermal target and quantity so we can review compatible filler grades and documents.

Request Quote

All products are supplied for research, development and industrial use only. Availability, shipping method and documentation may vary depending on destination country, product classification and regulatory requirements.