Preparation method of aluminum oxide/aluminium titanate porous ceramic
A technology of porous ceramics and alumina, applied in the field of preparation of porous ceramics, achieves the effects of simple preparation process, energy saving and short sintering time
Inactive Publication Date: 2012-09-05
HARBIN INST OF TECH
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Problems solved by technology
[0003] The object of the present invention is to solve the problems of complex preparation process, high sintering temperature, long sintering time and poor product performance of existing alumina-based porous ceramics, and provide a A kind of preparation method of aluminum oxide / aluminum titanate porous ceramic
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specific Embodiment approach 1
[0011] Specific Embodiment 1: In this embodiment, the alumina / aluminum titanate porous ceramic is made of 1 part of mixed powder, 0.4 to 1 part of deionized water and 0.01 to 0.015 parts of binder according to the ratio of parts by mass, wherein the mixed powder It is composed of 50% to 99% of nano-alumina and 1% to 50% of nano-titanium oxide in terms of mass percentage; the binder is polyvinyl alcohol, polyethylene, polypropylene, polystyrene, methyl cellulose, carboxymethyl cellulose, polyoxyethylene or hydroxyethyl cellulose.
specific Embodiment approach 2
[0012] Embodiment 2: This embodiment differs from Embodiment 1 in that the alumina / aluminum titanate porous ceramic is made of 1 part of mixed powder, 0.7 part of deionized water and 0.012 part of binder in terms of parts by mass. Others are the same as in the first embodiment.
specific Embodiment approach 3
[0013] Embodiment 3: This embodiment differs from Embodiment 1 in that the mixed powder consists of 60%-97% nano-alumina and 3%-40% nano-titanium oxide in mass percentage. Others are the same as in the first embodiment.
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Abstract
Disclosed is an alumina / aluminum titanate porous ceramic as well as a preparation method thereof, which relate to the porous ceramic and the preparation method. The porous ceramic solves the problems of complex preparation process, high sintering temperature, long sintering time and poor product performance of the current alumina-based porous ceramic. The alumina / aluminum titanate porous ceramic is prepared by mixed powders, deionized water and a binder, wherein, the mixed powders include nano-alumina and nano-titania. The preparation method comprises: firstly, weighting raw materials, and mixing the materials to obtain a slurry; secondly, re-granulation to the slurry for obtaining a nano-composite powder; thirdly, heat treatment to the nano-composite powder; and fourthly, insulating and sintering the nano-composite powder obtained after the heat treatment to gain the alumina / aluminum titanate porous ceramic. The porous ceramic and method have advantages of simple process, low sintering temperature, short sintering time and good product performance.
Description
technical field [0001] The invention relates to a preparation method of porous ceramics. Background technique [0002] Alumina-based porous ceramics are a class of widely used ceramic materials. The preparation process of existing alumina-based porous ceramics is complicated. The sintering temperature used is as high as 1500-1600°C, and the sintering time is as long as 30 minutes or more, resulting in high energy consumption. Moreover, additional pore-forming agents are added, which wastes resources, and the structural properties of the resulting products are poor, and the fracture toughness is less than 2MPa·m 1 / 2 , The bending strength is less than 120MPa, and the elastic modulus is less than 100GPa; the functional performance of the product is poor, which is manifested in poor thermal shock resistance and heat insulation. Contents of the invention [0003] The purpose of the present invention is to provide a preparation method of alumina / aluminum titanate porous cer...
Claims
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IPC IPC(8): C04B35/10C04B35/462C04B35/632
Inventor 杨勇王铀
Owner HARBIN INST OF TECH