Densification of ceramic materials using electromagnetic...

C - Chemistry – Metallurgy – 04 – B

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C04B 35/64 (2006.01) B65D 81/34 (2006.01) C04B 35/42 (2006.01)

Patent

CA 2492107

Method for manufacturing ceramic parts with a certain porosity by sintering using microwaves, the materials to be sintered being arranged in a vessel, characterized in that - the microwaves introduce sintering energy into the materials to be sintered via electromagnetic waves in the range of vacuum wavelengths between 5 cm - 20 cm in multimode having an electromagnetic power of up to one kilowatt, and - besides being built from primary materials for the structure of the vessel, the vessel is built from a secondary material which comprises, in particular, a mixture of or mixed crystals of non-metallic, para-, ferro- or antiferromagnetic materials.

L'invention concerne un procédé de production de pièces céramiques présentant une porosité déterminée par frittage au moyen de micro-ondes, les matériaux à fritter étant disposés dans un récipient. Ce procédé se caractérise en ce que les micro-ondes appliquent aux matériaux à fritter de l'énergie pour un frittage par ondes électromagnétiques dans une plage de longueur d'onde dans le vide comprise entre 5 cm et 20 cm en fonctionnement multimodal, avec une puissance électromagnétique allant jusqu'à un kilowatt, et en ce que le récipient est constitué, en plus de matières primaires, d'une matière secondaire composée d'un mélange comprenant des matières non métalliques paramagnétiques, ferromagnétiques, antiferromagnétiques ou ferroélectriques et des matières à point de fusion élevé transparentes aux micro-ondes.

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