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Title: Diamond Powder Particle Size Tradeoffs in Thermal Interface Materials

China, 3rd Nov 2026 - A thinner thermal interface looks like a straightforward way to reduce resistance between a processor and its cooling hardware. For the engineer developing the material, that goal quickly becomes a formulation problem. The filler has to fit the gap, and the mixture still has to flow into place. Choosing a finer diamond powder can help with the first requirement while making the second harder.Suppose a TIM formulation contains coarse particles that keep an assembly from reaching its intended bond-line thickness. Moving to a finer distribution seems reasonable. At the same filler volume, however, smaller particles expose more surface for the matrix to wet. Viscosity may rise, and a mixture that worked through the dispensing equipment may become difficult to process. The thinner layer now depends on solving a different problem.This is where Diamond Powder belongs in thermal management: as a filler dispersed in a matrix for thermal interface materials, thermally conductive adhesives, gap fillers, encapsulants, or potting compounds. It is a formulation ingredient, distinct from a CVD diamond sheet attached near a chip. The finished material gets its behavior from the combination of filler and matrix, including how they are mixed and assembled.Thermally conductive diamond powder for evaluation as a filler in thermal management formulations.A smaller particle changes the whole mixtureThe nominal particle size tells only part of the story. A small population of oversized particles can hold a thin interface open. Agglomerates can interfere with dispensing even when the individual particles are fine enough. Looking at the full particle-size distribution and the dispersion after mixing helps explain behavior that an average size can hide.Heat also has to cros...

This press release is issued by King Newswire