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A device for sintering high temperature resistant materials and its application

A high-temperature-resistant panel technology, applied in the field of high-temperature-resistant materials, can solve the problems of uneven temperature of high-temperature-resistant materials, uncontrollable sintering device bonding, poor high-temperature resistance, etc., and achieve good anti-adhesion, controllable appearance, and good shape and the effect of appearance

Active Publication Date: 2018-09-25
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problems to be solved by the present invention are uneven temperature in the sintering process of high temperature resistant materials, poor high temperature resistance performance, poor shape, appearance, porosity, microstructure of the preform to be sintered or uncontrollable, and bonding with the sintering device, etc. question

Method used

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  • A device for sintering high temperature resistant materials and its application
  • A device for sintering high temperature resistant materials and its application
  • A device for sintering high temperature resistant materials and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] (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.

[0073] (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.

[0074] (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 to 5

[0078] Except the content shown in the following table, it carried out in the same manner as Example 1.

[0079] Example

Openness (%)

Aperture ratio

Consistency score

1

20

4:5

4.7

2

5

9:10

4.6

3

30

4:5

4.4

4

20

1:1

4.1

5

20

1:1

3.2

6

20

9:10

4.9

[0080] Note:

[0081] (1) Openness (%) refers to the percentage of the total area of ​​gaps and through-holes to the total area of ​​the inner cavity enclosed by side panels;

[0082] (2) Aperture ratio means the ratio of the aperture on the outer wall (aperture of the outer wall) of the through hole to the aperture on the inner wall of the through hole (aperture of the inner wall);

[0083] (3) Embodiment 4 is that the side wall is not provided with a through hole;

[0084] (4) In Embodiment 5, the aperture diameters of the through holes on the four side panels all decrease by 10% equidistantly to both sides along th...

Embodiment 6

[0086] Except that the four top grooves of the top panel of the sintering device used are through, and the four side panels can pass through the corresponding through grooves of the top panel, so that the top panel can sink along with the force of gravity, the other is the same as the embodiment 1 prepared in the same way, the thickness of the final material is 3.45% smaller than the expected thickness.

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Abstract

The invention relates to a device for sintering a high-temperature-resistant material and application of the device. The device comprises side panels, a top panel and a bottom panel, wherein the side panels are made of silicon carbide; at least four top grooves are formed in the top panel; the left top groove and the right top groove are through grooves; a front bottom groove and a rear bottom groove are formed in the bottom panel; the front panel and the rear panel are respectively inserted in the front bottom groove and the rear bottom groove; positions, which are close to the left side and the right side of the bottom panel, of the left side panel and the right side panel are connected with the bottom panel; a plurality of through holes are formed in each side panel; a gap is formed between each two optional adjacent side panels; and anti-sticking parts which are formed by quartz fabrics are respectively paved on the inner wall of the top panel and the inner wall of the bottom panel. The invention further provides application of the device in sintering of the high-temperature-resistant material. The device has the advantages of simple structure, convenience in use, high temperature resistance, good thermal conductivity and anti-sticking property, even temperature, controllable material shape, size, appearance and microstructure and the like.

Description

technical field [0001] The invention relates to the field of high temperature resistant materials, in particular, the invention relates to a device for sintering high temperature resistant materials and its application. Background technique [0002] High temperature resistant materials are commonly used materials in the fields of industrial thermal engineering, aviation and aerospace. For example, aerospace vehicles will experience harsh aerodynamic heating environments, requiring the use of lightweight, dimensional, high-temperature insulation materials such as ceramic tiles to prevent heat transfer to the interior of the vehicle. [0003] In the preparation process of high-temperature-resistant materials such as ceramic heat-insulating tiles, in order to realize the light weight and heat insulation of high-temperature-resistant materials, it is usually necessary to form the material into a material with a certain porosity, which will be transferred to the sintered material...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F27B21/00F27B21/08
CPCF27B21/00F27D1/0006F27D1/003F27M2001/035F27M2003/04
Inventor 鲁胜吴宪张凡郭慧刘斌赵英民
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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