Boron nitride agglomerates, method of production thereof and use thereof

摘要

The invention relates to boron nitride agglomerates, comprising lamellar, hexagonal boron nitride primary particles, which are agglomerated with one another with a preferred orientation, the agglomerates formed being flake-shaped.;The invention also relates to a method for producing said boron nitride agglomerates, characterized in that lamellar, hexagonal boron nitride primary particles are agglomerated in such a way that they line up with one another with a preferred orientation.;The flake-shaped agglomerates according to the invention are suitable as filler for polymers for making polymer-boron nitride composites and for hot pressing of boron nitride sintered compacts.

主权项

1. Boron nitride agglomerates, comprising: lamellar, hexagonal boron nitride primary particles, the primary particles having an average particle size of 0.5 to 15 μm, in a binder free, flake-shape agglomerate formed with an essentially parallel alignment of the lamellae; the flake-shaped agglomerate having an average size d50 up to 3 mm; wherein the proportion of forming surface, relative to the total surface of the flake-shaped agglomerates, is at least 10%; and wherein the flake-shape agglomerates are produced by continuously feeding the lamellar, hexagonal boron nitride primary particles between two counter-rotating rolls.