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Method for preparing closed-pore alumina-based ceramic with controllable pore size
The invention discloses a method for preparing closed-pore alumina-based ceramic with controllable pore size, belonging to the technical field of materials. The method comprises the following steps: (1) preparing submicron order Al2O3 powder and submicron order MgAl2O4 powder; (2) preparing SiC particles coated with Al2O3 coatings on the surface; (3) performing ball-milling on all the prepared materials, uniformly mixing, pressing, and molding, thereby obtaining a green body; and (4) heating the green body to the temperature of 1600+/-10 DEG C in a stepped two-stage type heating mode, sintering for 1-8 hours, thereby obtaining the closed-pore alumina-based ceramic with controllable pore size. According to the method disclosed by the invention, the defect that the pore size of the closed pores cannot be controlled in the prepared closed-pore ceramic can be effectively overcome, the high-temperature heat-insulating property and thermal shock resistance of the closed-pore porous ceramic are improved, and the application field and the range are widened.
Method for preparing closed-pore alumina-based ceramic with controllable pore size
The invention discloses a method for preparing closed-pore alumina-based ceramic with controllable pore size, belonging to the technical field of materials. The method comprises the following steps: (1) preparing submicron order Al2O3 powder and submicron order MgAl2O4 powder; (2) preparing SiC particles coated with Al2O3 coatings on the surface; (3) performing ball-milling on all the prepared materials, uniformly mixing, pressing, and molding, thereby obtaining a green body; and (4) heating the green body to the temperature of 1600+/-10 DEG C in a stepped two-stage type heating mode, sintering for 1-8 hours, thereby obtaining the closed-pore alumina-based ceramic with controllable pore size. According to the method disclosed by the invention, the defect that the pore size of the closed pores cannot be controlled in the prepared closed-pore ceramic can be effectively overcome, the high-temperature heat-insulating property and thermal shock resistance of the closed-pore porous ceramic are improved, and the application field and the range are widened.
Method for preparing closed-pore alumina-based ceramic with controllable pore size
YUAN LEI (author) / XU DONGMING (author) / CHENG SAI (author) / LI CHENGRU (author)
2015-06-03
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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