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Preparation method of aluminum oxide porous material

A technology of porous materials and alumina, which is applied in the field of preparation of alumina porous materials, can solve the problems of widening pore size distribution and reducing porosity, and achieve the effects of improving rheology, increasing hydrophilicity, and improving the quality of green bodies

Active Publication Date: 2019-03-26
浙江昕明环境科技有限公司
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Problems solved by technology

However, under the action of mineralizers or fluxes, the small-sized particles in the material are more likely to grow up, resulting in a wider pore size distribution and a lower porosity of the material

Method used

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  • Preparation method of aluminum oxide porous material
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Examples

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Embodiment 1

[0025] In this example 1, the α-alumina powder with an average particle size of 18 μm is used as the raw material for preparing porous alumina materials, and the following steps and formulas are used to prepare alumina porous materials or produce alumina porous material products.

[0026] (1) prepare magnesium phosphate sol: add 200g phosphoric acid in reactor, the mass concentration of described phosphoric acid is 50%, start stirring, and add 50g light magnesium oxide powder in reactor, reactor is heated to 50 ℃, After the reactant forms a transparent sol, stop heating and stirring;

[0027] (2) Carry out particle modification treatment on alumina powder: put 50kg of alumina powder into a ball mill tank, add 15kg of water and 250g of magnesium phosphate sol, and ball mill to mix, then put the obtained alumina slurry in 80- Dry at 90°C to obtain modified alumina powder;

[0028] (3) Prepare alumina porous material aggregate: add 50 g of manganese oxide micropowder to the modi...

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Abstract

The invention discloses a preparation method of an aluminum oxide porous material. The preparation method comprises the following steps of modifying an aluminum oxide powder by a magnesium phosphate sol, adding a manganese oxide micropowder as a sintering additive, and reducing the firing temperature of the aluminum oxide porous material to the temperature of 1200 to 1400 DEG C. The preparation method has the advantage that the good pore structure can be obtained for the porous material within the wide firing temperature range. The aluminum oxide porous material prepared by the preparation method has excellent mechanical property.

Description

technical field [0001] The technical solution belongs to the technical field of ceramic materials, and in particular relates to a preparation method of an alumina porous material. Background technique [0002] Porous ceramics are ceramic materials with a large number of through and non-through three-dimensional porous structures. In addition to the various properties of ordinary ceramics, porous ceramics also have high specific surface area, good permeability and special sound absorption and noise reduction properties, so they can be used in purification and filtration, thermal insulation, biomedical, electronic devices and energy It is widely used in chemical industry and so on. [0003] At present, the preparation method of alumina porous ceramics is mainly the pore-forming process of particle accumulation: the particle accumulation process is to add fine particles of the same composition to the aggregate, and use the characteristics of the fine particles to be sintered e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/00C04B35/64C04B35/622C04B35/10
Inventor 席红安麦保祥卢庆贤
Owner 浙江昕明环境科技有限公司
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