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Preparation method of high-temperature-resistant, high-strength and rigid thermal insulation material

A thermal insulation material and high-strength technology, which is applied in the field of preparation of inorganic composite materials, can solve the problems that are not conducive to the use of large-scale kiln insulation bricks, high material density, and limited use, and achieve good anti-scouring performance, short production cycle, The effect of good thermal shock resistance

Active Publication Date: 2017-04-26
SHANDONG RES & DESIGN ACADEMY OF IND CERAMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The insulation brick material prepared by this patent is made of potassium hexatitanate whiskers and alumina particles. The material density is high, the weight of the unit brick body is large, and there is no porosity, which is not conducive to the production of large-size insulation bricks in large kilns. use
The use temperature of the insulation bricks prepared by this patent is below 1350°C, which limits the use in high-temperature kilns (≥1350°C)

Method used

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  • Preparation method of high-temperature-resistant, high-strength and rigid thermal insulation material
  • Preparation method of high-temperature-resistant, high-strength and rigid thermal insulation material
  • Preparation method of high-temperature-resistant, high-strength and rigid thermal insulation material

Examples

Experimental program
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Effect test

Embodiment 1

[0032] (1) Weigh 100 g of alumina fiber, and cut the fiber with a shearing device so that the average length of the fiber is 50 μm. Weigh 10 g of potassium hexatitanate whiskers (diameter 5-12 μm, length 50-250 μm).

[0033] (2) According to Al(OH) 3 :H 3 PO 4 :H 2 Al(H 2 PO 4 ) 3 Solution, preparation steps are as follows, weigh a certain amount of aluminum hydroxide (Al(OH) 3 ) slowly into deionized water, mix evenly, and under the condition of 70°C, slowly add concentrated phosphoric acid (H 3 PO 4 ), stirring while adding, to obtain a clear and transparent solution, take 5000gAl(H 2 PO 4 ) 3 solution.

[0034] (3) Mix the alumina fiber and potassium hexatitanate whisker in step (1) with the prepared solution in step (2), and stir evenly to completely disperse the fiber into the solution to obtain fiber slurry.

[0035] (4) Adjust the vacuum degree of the vacuum tank to -0.1 MPa, and the vacuum filtration treatment time is 10 minutes, and the vacuum filtration ...

Embodiment 2

[0040] (1) Weigh 100 g of alumina fiber, and cut the fiber with a shearing device so that the average length of the fiber is 50 μm. Weigh 3 g of potassium hexatitanate whiskers (diameter 5-12 μm, length 50-250 μm).

[0041] (2) According to Al(OH) 3 :H 3 PO 4 :H 2 Al(H 2 PO 4 ) 3 Solution, preparation steps are as follows, weigh a certain amount of aluminum hydroxide (Al(OH) 3 ) slowly into deionized water, mix evenly, and under the condition of 70°C, slowly add concentrated phosphoric acid (H 3 PO 4 ), stirring while adding, to obtain a clear and transparent solution, take 3000gAl(H 2 PO 4 ) 3 solution.

[0042] (3) Mix the alumina fiber and potassium hexatitanate whisker in step (1) with the prepared solution in step (2), and stir evenly to completely disperse the fiber into the solution to obtain fiber slurry.

[0043] (4) Adjust the vacuum degree of the vacuum tank to -0.1 MPa, and the vacuum filtration treatment time is 10 minutes, and the vacuum filtration i...

Embodiment 3

[0048] (1) Weigh 100 g of alumina fiber, and cut the fiber with a shearing device so that the average length of the fiber is 125 μm. Weigh 5 g of potassium hexatitanate whiskers (diameter 5-12 μm, length 50-250 μm).

[0049] (2) According to Al(OH) 3 :H 3 PO 4 :H 2 Al(H 2 PO 4 ) 3 Solution, preparation steps are as follows, weigh a certain amount of aluminum hydroxide (Al(OH) 3 ) slowly into deionized water, mix evenly, and under the condition of 70°C, slowly add concentrated phosphoric acid (H 3 PO 4 ), stirring while adding, to obtain a clear and transparent solution, take 4000gAl(H 2 PO 4 ) 3 solution.

[0050] (3) Mix the alumina fiber and potassium hexatitanate whisker in step (1) with the prepared solution in step (2), and stir evenly to completely disperse the fiber into the solution to obtain fiber slurry.

[0051] (4) Adjust the vacuum degree of the vacuum tank to -0.1 MPa, and the vacuum filtration treatment time is 10 minutes, and the vacuum filtration ...

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Abstract

The invention relates to a preparation method of a high-temperature-resistant, high-strength and rigid thermal insulation material and belongs to the technical field of preparation of inorganic composite materials. The preparation method comprises steps as follows: (1) pretreatment: alumina fibers and potassium hexatitanate whiskers are chopped; (2) one of an aluminum dihydrogen phosphate binder or a lanthanum phosphate binder is selected as a binder; (3) suction filtration forming: the chopped alumina fibers and potassium hexatitanate whiskers prepared in step (1) are placed in the binder prepared in step (2) in the mass ratio and mixed, slurry obtained through mixing is stirred, subjected to suction filtration forming, demolding and transferred to a constant-temperature drying oven; (4) heat treatment: a material prepared in step (3) is placed in a kiln for heat treatment. The preparation method is simple to operate and easy to implement, and the obtained target product has high mechanical properties and thermal insulation performance on the premise that the high porosity is guaranteed and has good anti-scouring performance and thermal shock resistance.

Description

technical field [0001] The invention relates to a method for preparing a high-temperature-resistant high-strength rigid heat-insulating material, which belongs to the technical field of inorganic composite material preparation. Background technique [0002] The heat insulation material used in high temperature kiln has the functions of heat insulation and load bearing. With the development of society, the country advocates energy saving and emission reduction. The application of high-efficiency heat insulation materials in kilns can greatly improve the utilization rate of heat energy and reduce energy consumption. Gas-phase heat conduction and radiation heat conduction are dominant in thermal insulation materials at high temperatures, and the proportion of radiation heat conduction is greater than that of gas-phase heat conduction. Studies have shown that the proportion of infrared radiation above 500°C accounts for 50%, and under the high temperature conditions of 1000°C a...

Claims

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Application Information

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IPC IPC(8): C04B28/34C04B38/00
CPCC04B28/344C04B2111/00431C04B2201/20C04B2201/32C04B2201/50C04B14/4625C04B14/383C04B38/0038C04B38/0067
Inventor 杨杰周长灵隋学叶刘瑞祥王开宇栾强程之强李伶
Owner SHANDONG RES & DESIGN ACADEMY OF IND CERAMICS
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