RWE Series aluminum nitride powders (AlN) are sintered, high-purity particles with a spherical shape, available in D50 sizes from 30 μm to 160 μm, with an epoxy-functional surface coating and an advanced anti-hydrolysis treatment applied.

Spherical particles achieve the highest thermal conductivity among AlN powder geometries by enabling superior filler loading and efficient packing in polymer matrices. The epoxy-functional coating improves particle bonding in epoxy resin matrices, while the anti-hydrolysis treatment keeps thermal performance and powder stability intact in wet and humid conditions. Hydrolysis resistance is tested with the powder immersed in water at 85°C/85%RH for more than 500 hours.

Combined with large particle sizes, RWE Series is the preferred choice for demanding thermal interface material formulations where maximum thermal conductivity, compatibility with epoxy resin matrices, and long-term stability in wet and humid conditions are all required.