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Porous ceramic and preparation method and application thereof

A technology of porous ceramics and pore-increasing agents, which is applied in the field of porous ceramics and its preparation, can solve the problems of low product qualification rate and high firing shrinkage rate, and achieve the effects of simple process, low firing shrinkage rate, and automation savings

Inactive Publication Date: 2020-01-14
SHENZHEN SMOORE TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, at present, in the process of preparing porous ceramics from diatomite, there is a defect of high firing shrinkage, resulting in low product qualification rate

Method used

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  • Porous ceramic and preparation method and application thereof

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preparation example Construction

[0021] The preparation method of the porous ceramic of one embodiment, the method comprises the following steps:

[0022] S1: Mix diatomite, environmental protection pore enhancer, inorganic flux, clay and organic adhesive according to the requirements of different pore sizes and grind them into uniform powder.

[0023] Wherein, the particle size range of diatomite can be 1-200 microns.

[0024] Among them, according to the pore diameter requirements of the porous ceramics to be prepared, the amount of the environmental protection pore enhancer, inorganic flux, clay and organic binder can be varied in a wide range. In one embodiment, based on 100 parts by weight of powder, the amount of environmentally friendly pore enhancer can be 5-50 parts by weight, the amount of inorganic flux can be 5-20 parts by weight, and the amount of clay can be 0.2-50 parts by weight. 5 parts by weight, the amount of the organic adhesive can be 0.4-2 parts by weight. The above ratio is beneficial...

Embodiment 1

[0037] Diatomite with a particle size range of 1-200 microns, environmentally friendly pore enhancer, inorganic flux, clay and organic binder are mixed and pulverized into a uniform powder; 100 parts by weight of the powder is used as a basis for environmental protection The amount of pore-enhancing agent is 5-50 parts by weight, the amount of inorganic flux is 5-20 parts by weight, the amount of clay is 0.2-5 parts by weight, and the amount of organic adhesive is 0.4-2 parts by weight. The obtained powder is mixed with water to prepare a water-based slurry with stable suspension performance, and the weight ratio of the powder to water is 1: (0.5-1.5). Then, it is spray-dried to make dry granulated powder with a particle size range of 40-300 meshes; then the dry granulated powder is dry-pressed and sintered at 1100-1600° C. to obtain porous ceramics.

[0038] The diameter of the micropores of the porous ceramics can range from 1 μm to 100 μm. Preferably, the volume of micropo...

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Abstract

The invention relates to a porous ceramic as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing diatomite, an environment-friendly pore-increasing agent, an inorganic fluxing agent, clay and an organic adhesive according to the requirements of different pore diameters, and crushing into uniform powder; mixing obtained powder with water to prepare a water-based slurry with stable suspension performance; carrying out spray drying on the water-based slurry to prepare dry granulation powder; and carrying out dry pressing molding and sintering on the dry granulation powder to obtain the porous ceramic. The preparation method is beneficial to reducing the firing shrinkage rate and improving product percent of pass, simple in process, low in production cost, easy to realize automation and energy-saving, and has relatively high application and popularization value.

Description

technical field [0001] The invention relates to the field of inorganic materials, in particular to a porous ceramic and its preparation method and application. Background technique [0002] Porous ceramic materials have controllable pore structure, high porosity, high specific surface area, high temperature and high pressure resistance, acid and alkali and organic medium corrosion resistance, long service life, good product regeneration performance, and can be widely used as catalytic carriers Materials, filter materials, building materials and other fields. [0003] Diatomaceous earth is a non-metallic mineral formed from the silicate remains of diatoms after death, and can be used as a raw material for the preparation of porous ceramics. However, in the current process of preparing porous ceramics from diatomite, there is a defect of high firing shrinkage, resulting in a low product qualification rate. Contents of the invention [0004] Based on this, it is necessary t...

Claims

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Application Information

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IPC IPC(8): C04B35/14C04B35/622C04B38/06
CPCC04B35/14C04B35/622C04B38/068C04B2235/349C04B2235/5436C04B2235/602C04B2235/656C04B2235/95C04B38/0645C04B38/0054
Inventor 王守平肖令荣张琳蒋振龙江雪涛王郁于春生
Owner SHENZHEN SMOORE TECH LTD