Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Method for preparing porous mullite microspheres
The invention relates to a technology for molding a ceramic material and particularly relates to a method for preparing porous mullite microspheres. The method comprises the following steps of mixing kaolin, bauxite, a crystalline catalyst AlF3 and a sintering aid to obtain a uniform mixed powder; adding a dispersant to the mixed powder prepared in the step 1 and adding deionized water to prepare uniform and stable water-based ceramic slurry with different solid contents, pouring the slurry into oil, forming balls and emulsifying the water-based ceramic slurry and oil in a polystyrene tray under the action of high-speed stirring, placing the mixed solution of slurry and oil into the polystyrene tray, freezing and filtering to obtain solidified ceramic microspheres, drying the solidified ceramic microspheres and carrying out pressureless sintering on dried ceramic microspheres in an aluminum oxide crucible to obtain the porous mullite microspheres. By the method, the ceramsite density is decreased and meanwhile the production cost is reduced and the method is used for preparing high-strength low-density ceramic for oil fracturing exploitation.
Method for preparing porous mullite microspheres
The invention relates to a technology for molding a ceramic material and particularly relates to a method for preparing porous mullite microspheres. The method comprises the following steps of mixing kaolin, bauxite, a crystalline catalyst AlF3 and a sintering aid to obtain a uniform mixed powder; adding a dispersant to the mixed powder prepared in the step 1 and adding deionized water to prepare uniform and stable water-based ceramic slurry with different solid contents, pouring the slurry into oil, forming balls and emulsifying the water-based ceramic slurry and oil in a polystyrene tray under the action of high-speed stirring, placing the mixed solution of slurry and oil into the polystyrene tray, freezing and filtering to obtain solidified ceramic microspheres, drying the solidified ceramic microspheres and carrying out pressureless sintering on dried ceramic microspheres in an aluminum oxide crucible to obtain the porous mullite microspheres. By the method, the ceramsite density is decreased and meanwhile the production cost is reduced and the method is used for preparing high-strength low-density ceramic for oil fracturing exploitation.
Method for preparing porous mullite microspheres
HOU ZHAOPING (Autor:in) / ZHANG CHANGJIANG (Autor:in) / ZHANG SHUZHI (Autor:in) / GAO FENG (Autor:in) / CUI BINGXIA (Autor:in)
20.05.2015
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
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