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Lightweight rigid ceramic heat-insulation tile and manufacture method thereof

A technology of heat insulation tiles and ceramics, applied in the field of porous ceramic materials, can solve the problems of high manufacturing cost, stop of research work, and poor performance of alumina fibers and aluminum borosilicate, so as to improve heat insulation performance and mechanical properties, reduce cost effect

Inactive Publication Date: 2011-09-28
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The Institute of Aerospace Materials and Technology was the first to start the development of ceramic heat-insulating tiles in China. However, since there is no alumina fiber or aluminum borosilicate fiber that meets the performance requirements in China, the heat-insulating performance and mechanical properties of the developed ceramic heat-insulating tiles are comparable to those of Compared with American products, the gap is obvious
So far, the country still cannot provide high-performance alumina fiber or aluminum borosilicate fiber, which seriously hinders the improvement of the performance of ceramic insulation tiles.
On the other hand, high-performance alumina fiber and aluminum borosilicate are very expensive to manufacture, which is not conducive to the cost control of ceramic insulation tiles
In the 1970s, General Motors of the United States also carried out the development of mullite fiber ceramic tiles, but its performance was inferior to that of quartz fiber ceramic tiles, so it was not adopted by the space shuttle thermal protection system, and the research work stopped. There is no specific report on the ratio and performance

Method used

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  • Lightweight rigid ceramic heat-insulation tile and manufacture method thereof
  • Lightweight rigid ceramic heat-insulation tile and manufacture method thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0035] (1) Weigh 84g of boron nitride and disperse it in 1000mL of ethanol, after the dispersion is uniform, set aside.

[0036] (2) Weigh 1912g of quartz fiber, 350g of mullite fiber, 207g of starch, and mix the solution in (1) with 100L of deionized water, and use a mechanical stirrer to uniformly disperse the fibers in deionized water to obtain a slurry.

[0037] (3) Transfer the above-mentioned slurry to a forming mold, and vacuum filter; transfer the filter cake to a pressure forming machine, apply a pressure of 7-9 MPa to form, and obtain a ceramic heat-insulating tile wet blank.

[0038] (4) Put the wet body of the ceramic heat-insulating tile into an oven at 80-120° C. and dry it for 24-48 hours to obtain a dry body of the ceramic heat-insulating tile.

[0039] (5) Put the dry ceramic tile into a high-temperature sintering furnace and treat it at 1200-1500°C for 4-10 hours to obtain a ceramic tile with a density of 0.33g / cm 3 ; The tensile strength in the plane direct...

example 2

[0041] (1) Weigh 84g of boron nitride and 100g of silicon carbide and disperse them in 2000mL of absolute ethanol, and disperse evenly before use.

[0042] (2) Weigh 1912g of quartz fiber, 350g of mullite fiber, 207g of starch, and mix the solution in (1) with 100L of deionized water, and use a mechanical stirrer to uniformly disperse the fibers in deionized water to obtain a slurry.

[0043] (3) Transfer the above slurry to a forming mold, and vacuum filter; transfer the filter cake to a pressure forming machine, apply a pressure of 8-10 MPa to form, and obtain a ceramic heat-insulating tile wet body.

[0044] (4) Put the wet body of the ceramic heat-insulating tile into an oven at 80-120° C. and dry it for 24-48 hours to obtain a dry body of the ceramic heat-insulating tile.

[0045] (5) Put the dry body of the ceramic heat-insulating tile into a high-temperature sintering furnace, and treat it at 1200-1500° C. for 4-10 hours to obtain the ceramic heat-insulating tile. The ...

example 3

[0047] (1) Weigh 38.2g of boron nitride and disperse it in 1000mL of ethanol, evenly disperse it, and set it aside.

[0048] (2) Weigh 870 g of quartz fiber, 240 g of mullite fiber, 94 g of starch, and mix the solution in (1) with 100 L of deionized water, and use a mechanical stirrer to uniformly disperse the fibers in deionized water to obtain a slurry.

[0049] (3) Transfer the above-mentioned slurry to a forming mold, and vacuum filter; transfer the filter cake to a pressure forming machine, apply a pressure of 4-6 MPa to form, and obtain a ceramic heat-insulating tile wet body.

[0050] (4) Put the wet body of the ceramic heat-insulating tile into an oven at 120-150° C. and dry it for 12-36 hours to obtain a dry body of the ceramic heat-insulating tile.

[0051] (5) Put the dry body of the ceramic heat-insulating tile into a high-temperature sintering furnace, and treat it at 1300-1500° C. for 4-8 hours to obtain a ceramic heat-insulating tile. The density is 0.15g / cm 3...

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Abstract

The invention relates to lightweight rigid ceramic heat-insulation tile and a manufacture method thereof. The lightweight rigid ceramic heat-insulation tile comprises the following components: ceramic fibers, starch accounting for 0.05-15wt% of the ceramic fibers, a sintering aid and a sunscreen, wherein the ceramic fibers are composed of 50-100wt% of quartz fibers and 0-50wt% of porzite fibers; the sintering aid is boron nitride accounting for 0.01-15wt% of the ceramic fibers; and the sunscreen is silicon carbide accounting for 0-20wt% of the ceramic fibers. According to the invention, the quartz fibers and porzite fibers are utilized as raw materials to manufacture the ceramic heat-insulation tile with good heat-insulation and mechanical properties through fiber dispersion, wet blank shaping, high-temperature sintering and like. The obtained ceramic heat-insulation tile has the advantages that the density is 0.15-0.80 g / cm<3>, the thermal conductivity at room temperature is 0.045W / m.K, and the plane tensile strength is larger than 0.4 MPa. According to the invention, the porzite fibers are utilized to substitute for aluminum oxide fibers and aluminum borosilicate fibers, and the performance of the ceramic heat-insulation tile is approximate to that of the ceramic heat-insulation tiles used by the space shuttles in America.

Description

technical field [0001] The present invention relates to a kind of lightweight (density is generally less than 1.0g / cm 3 ) The invention relates to a rigid ceramic heat-insulating tile and a preparation method thereof, which belong to the technical field of porous ceramic materials, and the invention can be used for thermal protection materials of aerospace vehicles. Background technique [0002] When a space vehicle flies in the atmosphere, due to the severe aerodynamic heating environment, it is necessary to use lightweight, high-efficiency heat insulation materials to prevent heat transfer to the interior of the vehicle, so as to ensure the safety of the vehicle. In addition to light weight and low thermal conductivity, the mechanical properties (tensile strength, compressive strength, etc.) of thermal insulation materials are also important factors to be considered in material selection. In the process of developing the space shuttle, the United States has developed rigi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/622
Inventor 孙陈诚胡子君李俊宁鲁胜王钦姚先周张宏波吴文军宋兆旭
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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