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Preparation method of foamed ceramic

A technology for foamed ceramics and ceramic mud, applied in the field of ceramics, can solve the problems of high requirements for raw materials and difficult control of process conditions, and achieves the effects of uniformly adjustable pore size and stable performance

Inactive Publication Date: 2014-12-10
JIANGSU SOUTH PORCELAIN INSULATOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of the foaming reaction method is that it has high requirements for raw materials and the process conditions are not easy to control

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: a kind of foamed ceramics, it is to utilize precursor impregnated slurry to make, and precursor is sponge, and slurry is mainly made of the raw material of following weight percentage: ceramic mud, sodium hexametaphosphate, water glass, Water, wherein, ceramic mud 70%, the weight of sodium hexametaphosphate is 0.6% of the ceramic mud weight, the weight of water glass is 0.4% of the ceramic mud weight, and the balance is water.

[0027] The preparation method of the above-mentioned foamed ceramics is as follows: after cutting the sponge with a pore diameter of 40ppi according to the required size, soak it in a NaOH solution with a concentration of 3mol / L at a temperature of 50°C for 2 hours, take it out, wash it and dry it in the air, and then soak it in a solution with a mass concentration of 2%. Soak in sodium carboxymethylcellulose solution for 1 hour, squeeze out and dry in the air. Mix the ceramic mud with water at 70%, then add sodium hexametaphosphat...

Embodiment 2

[0028] Embodiment 2: a kind of foamed ceramics, it is to utilize precursor impregnated slurry to make, and precursor is sponge, and slurry is mainly made of the raw material of following weight percent: ceramic mud, sodium tripolyphosphate, water glass, Methyl cellulose, water, wherein, the weight of ceramic mud 73%, sodium tripolyphosphate is 0.4% of ceramic mud weight, the weight of water glass is 1.3% of ceramic mud weight, and the weight of methylcellulose is 1.5% of the weight of ceramic mud; the balance is water.

[0029] The preparation method of the above-mentioned foamed ceramics is as follows: the sponge with a pore diameter of 60ppi is cut according to the required size, soaked in a NaOH solution with a temperature of 50°C and a concentration of 3mol / L for 2 hours, taken out, washed and dried in the air. Mix the ceramic mud with water in proportion, then add methyl cellulose, sodium tripolyphosphate and water glass, ball mill for 3 hours, and pass through a 200-mes...

Embodiment 4

[0032]Embodiment 4: substantially identical with embodiment 1, difference is, ceramic mud 74%, the weight of sodium hexametaphosphate is 0.6% of ceramic mud weight, the weight of water glass is 2% of ceramic mud weight, The balance is water.

[0033] The lye used is NaOH solution with a concentration of 1.5mol / L at a temperature of 50°C; the mass concentration of sodium carboxymethylcellulose solution is 1%.

[0034] Take out the sponge soaked in lye, wash it and dry it, soak it in a sodium carboxymethyl cellulose solution with a mass concentration of 1% for 2 hours, squeeze it dry, take it out and dry it in the air.

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Abstract

The invention discloses foamed ceramic, and a preparation method of the foamed ceramic. The method comprises the following steps: preparing foamed ceramics by using precursor dipping slurry, wherein the precursor is sponge; the slurry is mainly prepared from the following raw materials in percentage by weight: 70-74% of ceramic clay and the balance of water; dipping treated flexible polyurethane sponge in the slurry, discharging the slurry, drying and sintering at 1200-1260 DEG C, and carrying out heat preservation for an hour, thus obtaining the product. The foamed ceramic disclosed by the invention has uniform and controllable aperture and stable performance; the volume-weight is 0.4-0.8g / cm<3>, the whole porosity is 50-90%, and the strength can reach 4MPa; and the foamed ceramic is an ideal foamed ceramic sound-absorbing material.

Description

technical field [0001] The invention belongs to the field of ceramics, in particular to a method for preparing foam ceramics. Background technique [0002] Foam ceramics are porous ceramics shaped like foam. It has three-dimensional interconnected pores, and its shape, pore size, permeability, surface area and chemical properties can be adjusted appropriately. The product is like "tempered foam" or "ceramized sponge". Foamed ceramics have attracted increasing attention due to their special properties, such as high specific surface area, high permeability, low bulk density, and low thermal conductivity. These excellent properties make it widely used in catalyst carrier, molten metal filtration, high temperature gas filtration, refractory materials, biological materials and other fields. The foam ceramic material has developed from the initial ordinary clay to high temperature resistant, corrosion resistant, thermal shock resistant materials (such as silicon carbide, alumin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/06
Inventor 杨志峰马成良陈春华王士维刘少华罗杰顾诚
Owner JIANGSU SOUTH PORCELAIN INSULATOR CO LTD