Saint-gobain Ceramics & Plastics, Inc.

Saint-gobain Centre De Recherches Et D'etudes Europeen

Elodie Bahon

Nabil Nahas

Pierre-Loup Judas

Yves Boussant-Roux

Nabil J Nahas

Yves Boussant-roux

Disclosed are methods for forming boron nitride-containing aggregates that exhibit improved wear by attrition, and resulting filled polymers that exhibit significantly improved thermal conductivity. The boron nitride-containing aggregates are prepared according to a method that includes wet granulating boron nitride powder with a granulation solution to form wet boron nitride-containing granules; and drying the wet boron nitride-containing granules to cause evaporation of solvent in the granulation solution, thereby forming boron nitride-containing granules. Sintering achieves the desired boron nitride-containing aggregates.

Process for manufacturing boron nitride agglomerates

A powder essentially composed of aggregates based on boron nitride, the powder exhibiting an overall chemical composition, as percentages by weight, including between 40 and 45% of boron, between 53 and 57% of nitrogen, less than 400 ppm by weight of calcium, less than 5 %, in total, of other elements and more than 90% of boron nitride, limit included, as percentage by weight and on the basis of the combined crystalline phases, a mean circularity of greater than or equal to 0.90, a median pore size of less than or equal to 1.5 &#x3bc;m and an apparent porosity of less than or equal to 55%.

Boron nitride aggregate powder

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Salon de Provence, France

Elodie Bahon