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A platform for research: civil engineering, architecture and urbanism
Porous material with central symmetry structure and method for preparing the same
The invention discloses a porous material with a central symmetry structure. Layered holes of the porous material are of a central symmetry oriented structure along the radial cross section. A method for preparing the porous material with the central symmetry structure comprises adding a dispersing agent and adhesives in water, adding ceramic powder after uniform mixing, using a zirconia ball or an alumina ball as a ball milling medium to perform ball milling, obtaining slurry with the volume concentration of 20%-40%; injecting the slurry in a cylindrical die with the side face and the bottom surface provided with a heat transfer material, placing the die on a freezing partition plate of a freezing dryer to freeze the slurry for 2-4 h, causing the freezing temperature to be -50 DEG C to -30 DEG C; completely freezing the slurry and then taking the slurry out of the die, placing the frozen slurry in the environment with the pressure of 0-600 Pa to perform low pressure drying for 20-24 h, so as to obtain a porous material prefabricated body; and finally sintering the porous material prefabricated body in the air or in the atmosphere of vacuum at 800-1700 DEG C for 2-3 h to obtain the porous material.
Porous material with central symmetry structure and method for preparing the same
The invention discloses a porous material with a central symmetry structure. Layered holes of the porous material are of a central symmetry oriented structure along the radial cross section. A method for preparing the porous material with the central symmetry structure comprises adding a dispersing agent and adhesives in water, adding ceramic powder after uniform mixing, using a zirconia ball or an alumina ball as a ball milling medium to perform ball milling, obtaining slurry with the volume concentration of 20%-40%; injecting the slurry in a cylindrical die with the side face and the bottom surface provided with a heat transfer material, placing the die on a freezing partition plate of a freezing dryer to freeze the slurry for 2-4 h, causing the freezing temperature to be -50 DEG C to -30 DEG C; completely freezing the slurry and then taking the slurry out of the die, placing the frozen slurry in the environment with the pressure of 0-600 Pa to perform low pressure drying for 20-24 h, so as to obtain a porous material prefabricated body; and finally sintering the porous material prefabricated body in the air or in the atmosphere of vacuum at 800-1700 DEG C for 2-3 h to obtain the porous material.
Porous material with central symmetry structure and method for preparing the same
TANG YUFEI (author) / QIU SHA (author) / ZHAO KANG (author) / WU CONG (author)
2015-09-30
Patent
Electronic Resource
English
Method for preparing porous carbon material and porous carbon material obtainable by same
| European Patent Office | 2021