Boron nitride agglomerated powder

C - Chemistry – Metallurgy – 01 – B

Patent

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Details

C01B 21/064 (2006.01) C04B 35/583 (2006.01) C04B 35/5831 (2006.01)

Patent

CA 2534787

Novel boron nitride agglomerated powders are provided having controlled density and fracture strength features. In addition methods for producing the same are provided. One method calls for providing a feedstock powder including boron nitride agglomerates, and heat treating the feedstock powder to form a heat treated boron nitride agglomerated powder. In one embodiment the feedstock powder has a controlled crystal size. In another, the feedstock powder is derived from a bulk source.

L'invention concerne de nouvelles poudres agglomérées de nitrure de bore présentant des caractéristiques contrôlées de densité et de résistance à la rupture. Elle concerne également des procédés de production de telles poudres. Un procédé consiste à fournir une poudre de charge renfermant des agglomérats de nitrure de bore et à traiter thermiquement la poudre de charge de façon à former une poudre agglomérée de nitrure de bore. Dans un mode de réalisation, la poudre de charge présente une taille cristalline contrôlée. Dans un autre mode de réalisation, la poudre de charge provient d'une source en vrac.

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