Hydrothermal processing in the wet-chemical preparation of...

Details Hydrothermal processing in the wet-chemical preparation of... Hydrothermal processing in the wet-chemical preparation of...

C - Chemistry, Metallurgy

04

B

C04B 35/01 (2006.01) C04B 35/468 (2006.01) C04B 35/64 (2006.01)

Patent

CA 2757626

A method of forming at least partially crystalline ceramic powder includes providing mixed metal oxide particles in an aqueous suspension in a hydrothermal treatment vessel, heating the aqueous suspension at a temperature of at least 150°C at a treatment pressure of at least 200 psi, and adding an aqueous solution having a temperature of not greater than 100°C to the hydrothermal treatment vessel while heating and while releasing steam from the hydrothermal treatment vessel.

L'invention concerne un procédé de préparation d'une poudre céramique au moins en partie cristalline comprenant la production de particules d'oxyde de métal mixte dans une suspension aqueuse dans une cuve de traitement hydrothermique, le chauffage de la suspension aqueuse à une température d'au moins 150 °C à une pression de traitement d'au moins 200 psi, et l'ajout d'une solution aqueuse dont la température n'est pas supérieure à 100 °C à la cuve de traitement hydrothermique tout en chauffant et libérant la vapeur d'eau de la cuve de traitement hydrothermique.

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