Explosive fragmentation process

C - Chemistry – Metallurgy – 09 – K

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C09K 3/14 (2006.01) B02C 19/00 (2006.01)

Patent

CA 2274224

Porous ceramic particles can be fragmented by generating a gas inside the pores at a sufficient pressure to cause the particles to be fragmented. The preferred way of generating the pressure is by immersing the particles in a liquid that at ambient temperatures and pressures is a gas until the liquid is absorbed into the pores and thereafter rapidly changing the conditions such that the liquid becomes a gas resulting in explosive fragmentation of the ceramic particles.

Les particules en céramique poreuses peuvent être fragmentées par la production d'un gaz à l'intérieur des pores à une pression suffisante pour entraîner une fragmentation des particules. Le procédé préféré pour générer cette pression consiste à immerger les particules dans un liquide qui prend une forme gazeuse à température et à pression ambiantes, jusqu'à ce que le liquide soit absorbé par les pores, puis à changer rapidement les conditions de manière que le liquide se transforme en gaz et produise une fragmentation des particules en céramique par explosion.

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