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A light-weight and high-temperature-resistant ceramic fiber rigid heat-insulating tile and its manufacturing method

A technology of high-temperature-resistant ceramics and ceramic fibers, which is applied in the field of lightweight high-temperature-resistant ceramic fiber rigid heat-insulating tiles and its manufacturing, can solve the problems of high thermal conductivity, poor temperature resistance, and poor mechanical properties of rigid heat-insulating tiles, and achieve improved The effect of mechanical properties, small discreteness, and uniform density distribution

Active Publication Date: 2017-08-25
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the purpose of the present invention is to overcome the deficiencies of existing ceramic fiber rigid insulation tiles such as high thermal conductivity, poor mechanical properties, and poor temperature resistance.

Method used

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  • A light-weight and high-temperature-resistant ceramic fiber rigid heat-insulating tile and its manufacturing method
  • A light-weight and high-temperature-resistant ceramic fiber rigid heat-insulating tile and its manufacturing method
  • A light-weight and high-temperature-resistant ceramic fiber rigid heat-insulating tile and its manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] (1) Weigh 15.0 grams of boron nitride powder and 50 grams of soluble starch, add 5000 milliliters of deionized water and 5000 milliliters of absolute ethanol, and stir well to obtain a sintering aid suspension.

[0083] (2) Take by weighing 670 grams of fused silica glass fiber, 220 grams of alumina fiber, 110 grams of yttrium oxide stabilized zirconia fiber, the suspension in (1) and 500 liters of deionized water and mix, use a high-speed shear mixer to mix the fiber in Uniformly disperse in deionized water to obtain a slurry.

[0084] (3) The above-mentioned slurry is poured into the forming mold, and the target density of the final product obtained by adjusting the height of the mold is 0.14g / cm 3 . Use suction filtration to filter out most of the water until it stops dripping when standing under normal pressure. Then the mold is transferred to a pressure forming machine, and a pressure of 2.5 MPa is applied to obtain a ceramic fiber heat-insulating tile wet body. ...

Embodiment 2

[0088] (1) Weigh 15.0 grams of boron nitride powder, 30 grams of silicon carbide powder, and 50 grams of soluble starch, add 5000 milliliters of deionized water and 5000 milliliters of absolute ethanol, and stir well to obtain a sintering aid suspension.

[0089] (2) Weigh 850 grams of quartz fiber, 150 grams of mullite (3Al 2 o 3 2SiO2 2 ) fibers are mixed with the suspension in (1) and 500 liters of deionized water, and the fibers are uniformly dispersed in the deionized water using a high-speed shear mixer to obtain a slurry.

[0090] Subsequent molding and sintering procedures are exactly the same as in Example 1.

Embodiment 3

[0092] (1) Weigh 15.0 grams of boron nitride powder, 30 grams of silicon carbide powder, and 50 grams of soluble starch, add 5000 milliliters of deionized water and 5000 milliliters of absolute ethanol, and stir well to obtain a sintering aid suspension.

[0093] (2) Weigh 780 grams of quartz fibers, 220 grams of alumina fibers, mix the suspension in (1) and 500 liters of deionized water, and use a high-speed shear mixer to uniformly disperse the fibers in the deionized water to obtain a slurry.

[0094] Subsequent molding and sintering procedures are exactly the same as in Example 1.

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Abstract

The invention relates to a light-weight high-temperature-resistant ceramic fiber rigid heat-insulation tile and a manufacturing method thereof. The thermal insulation tile includes ceramic fibers and boria, wherein the ceramic fibers include quartz fibers, alumina fibers and yttria-stabilized zirconia fibers. The method includes 5. A method for manufacturing lightweight high-temperature-resistant ceramic fiber rigid heat-insulating tiles, characterized in that the method includes preparing a sintering aid suspension, preparing ceramic fiber slurry, forming a wet blank, and drying the wet blank and pressure sintering steps. The heat insulation tile has good heat insulation effect and mechanical properties; light weight and high temperature resistance; the density is controllable between 0.10 and 0.90g / cm3; the apparent thermal conductivity at room temperature can be as low as 0.033W / (m·K); The compressive strength at room temperature is greater than 3.0Mpa; the long-term use temperature can reach 1350°C.

Description

technical field [0001] The invention belongs to the technical field of special materials. Specifically, the invention relates to a light-weight high-temperature-resistant ceramic fiber rigid heat-insulation tile and a manufacturing method thereof. Background technique [0002] When a high-speed aerospace vehicle flies in the atmosphere or re-enters the atmosphere, due to the severe aerodynamic heating environment, it is necessary to use lightweight, three-dimensional, high-efficiency heat insulation materials to prevent heat transfer to the interior of the aircraft, so as to ensure the safety of the aircraft. In addition to low density and low thermal conductivity, the tensile strength, compressive strength, high-temperature linear shrinkage and reusability of thermal insulation materials are also important factors to be considered in material selection. [0003] In the process of developing the space shuttle, the United States has successively developed a variety of ceramic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/80C04B35/82C04B35/622
Inventor 鲁胜张凡刘斌苏力军李文静赵英民
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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