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Hollow ball ceramic fiber brick and preparation method thereof

A ceramic fiber and hollow sphere technology, applied in ceramic products, other household appliances, applications, etc., can solve the problems of poor strength, easy formation of gaps, high thermal conductivity, long service life, improved thermal shock resistance, and reduced thermal conductivity. The effect of coefficients

Pending Publication Date: 2021-10-29
ALCERA (SUZHOU) CO LTD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Existing refractory and heat insulating bricks generally have a variety of hollow heat insulating bricks in order to achieve refractory and heat insulation effects. Generally, hollow heat insulating bricks are made by mixing various refractory and heat insulating material components and then firing them. As a result, the structure has large internal voids, relatively high thermal conductivity, and relatively poor strength. Cracks will appear soon after stacking and use, and heat will escape from the cracks.
[0003] Moreover, most of the existing refractory and heat-insulating bricks are in the shape of cuboids. During the stacking process, due to the different sizes of kilns, furnaces with different diameters need to be piled up. It is difficult to control the accuracy of the cuboid-shaped heat-insulating bricks size, it is easy to form gaps and affect the heat insulation effect

Method used

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  • Hollow ball ceramic fiber brick and preparation method thereof
  • Hollow ball ceramic fiber brick and preparation method thereof

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preparation example Construction

[0027] A preparation method of hollow ball ceramic fiber brick, comprising the following steps:

[0028] Step 1: Prepare materials, prepare 59~65% alumina hollow spheres, 30~35% high-purity alumina powder, 2~5% polycrystalline mullite fiber, 1~3% high-temperature adhesive for coating The glass-coated slurry on the outer surface of the brick body 1, the glass-coated slurry is usually made of silicon dioxide, aluminum oxide, quicklime, magnesium oxide, potassium oxide and sodium oxide ball milled, melted and fired, and then crushed and ground after cooling Prepared by mixing barium sulfate solution;

[0029] Step 2: Carry out high-temperature heat treatment on the polycrystalline mullite fiber at a temperature of 1280-1500 ° C, and keep it warm for more than 1 hour, uniformly crush the heat-treated polycrystalline mullite fiber for use, and add water to the high-temperature adhesive to prepare The solution with a mass fraction lower than 40% is ready for use, and the high-tempe...

Embodiment 1

[0038] Embodiment 1: The component distribution ratio is: 60% alumina hollow sphere; 35% high-purity alumina powder; 2% polycrystalline mullite fiber; 3% high-temperature binder.

[0039]The density of the sample brick after production and sintering: 1600kg / m³, after testing, the maximum service temperature can reach 1700°C, and the linear shrinkage test is carried out at 1600°C*2hr. , in line with heat resistance requirements.

[0040] Comparison of thermal shock resistance test: Put the prepared hollow ball ceramic fiber brick into a high-temperature furnace, heat it to 1200°C, keep the temperature for 1 hour, open the furnace door, pull out the ceramic fiber board, expose it to the air, and cool it to After the surface temperature is 200°C, put it into the furnace and heat up rapidly (30°C / min heating), and repeat the steps.

[0041] Test results: The new hollow ball ceramic fiber brick can be subjected to more than 6 times of rapid cooling and rapid heating tests at a tem...

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Abstract

The invention relates to a hollow sphere ceramic fiber brick and a preparation method thereof. The hollow sphere ceramic fiber brick comprises a brick body by weight percentage; the brick body is prepared by sintering 59-65% of alumina hollow spheres, 30-35% of high purity alumina powder, 2-5% of polycrystalline mullite fiber, and 1-3% of high temperature binder; the polycrystalline mullite fibers can fill gaps among the alumina hollow spheres and the alumina powder in the hollow ball brick, so that the thermal shock resistance of the brick is improved, the heat conduction coefficient of the brick is reduced while the corrosion resistance of the hollow ball brick is not reduced, and the hollow ball brick is more energy-saving and longer in service life.

Description

technical field [0001] The invention relates to a hollow ball ceramic fiber brick and a preparation method thereof. Background technique [0002] Existing refractory and heat insulating bricks generally have a variety of hollow heat insulating bricks in order to achieve refractory and heat insulation effects. Generally, hollow heat insulating bricks are made by mixing various refractory and heat insulating material components and then firing them. As a result, the structure has large internal voids, relatively high thermal conductivity, and relatively poor strength. Cracks will occur soon after stacking and use, and heat will escape from the cracks. [0003] Moreover, most of the existing refractory and heat-insulating bricks are in the shape of cuboids. During the stacking process, due to the different sizes of kilns, furnaces with different diameters need to be piled up. It is difficult to control the accuracy of the cuboid-shaped heat-insulating bricks Size, it is easy t...

Claims

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Application Information

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IPC IPC(8): C04B35/80C04B35/101C04B38/08C04B35/63
CPCC04B35/80C04B35/101C04B38/08C04B35/6309C04B35/6303C04B2235/5232C04B2235/6562C04B2235/6567C04B2235/6565C04B2235/77C04B2235/9615Y02P40/60
Inventor 吹野洋平
Owner ALCERA (SUZHOU) CO LTD
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