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Preparation method and product of ceramic material component with adjustable thermal expansion

A ceramic material and thermal expansion technology, applied in the field of preparation of ceramic material components, can solve the problems of inability to adjust, inability to achieve zero thermal expansion and negative thermal expansion, limited application, etc., and achieve the effect of simple preparation method, easy operation, and high-precision molding

Active Publication Date: 2021-05-18
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, natural materials with adjustable thermal expansion are very rare, and even if there are very few low-expansion materials that have been found, none of them can achieve zero thermal expansion and negative thermal expansion.
In addition, the thermal expansion coefficient value of the material is fixed and cannot be adjusted, which greatly limits its application in the engineering field

Method used

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  • Preparation method and product of ceramic material component with adjustable thermal expansion
  • Preparation method and product of ceramic material component with adjustable thermal expansion
  • Preparation method and product of ceramic material component with adjustable thermal expansion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] (1) Design a two-dimensional isosceles triangular structure ceramic material component with zirconia as the base and alumina as the hypotenuse, then α in formula (1) b =12.78×10 -6 / °C,α h =8.2×10 -6 / °C, according to formula (1), the relationship between the half-vertex angle and the equivalent thermal expansion coefficient in the height direction can be obtained, such as image 3 shown. Select the design value as 0×10 -6 / °C, and the half top angle is 53.69°.

[0056] (2) Prepare 100mL of alumina slurry, wherein the volume content of alumina ceramic powder is 55vol.%, the content of photosensitive resin is 45vol.%, and the amount of polymer dispersant KOS110 is 2wt% of the amount of alumina ceramic powder. The amount of initiator TPO added is 1wt% of the amount of photosensitive resin, the amount of sintering aid titanium dioxide is 3wt% of the amount of alumina ceramic powder, and the amount of magnesium oxide is 1wt% of the amount of alumina ceramic powder. Aft...

Embodiment 2

[0062] (1) Design a two-dimensional isosceles triangular structure ceramic material component with zirconia as the base and alumina as the hypotenuse, according to image 3 shown. Select the design value as -16.03×10 -6 / °C, and the half top angle is 66.5°.

[0063] (2) Prepare 100mL of alumina slurry, wherein the volume content of alumina ceramic powder is 55vol.%, the content of photosensitive resin is 45vol.%, and the amount of polymer dispersant KOS110 is 2wt% of the amount of alumina ceramic powder. The amount of initiator TPO added is 2wt% of the amount of photosensitive resin, the amount of sintering aid titanium dioxide is 3wt% of the amount of alumina ceramic powder, and the amount of magnesium oxide is 1wt% of the amount of alumina ceramic powder. After 14 hours of ball milling, the oxide Aluminum paste, denoted as A.

[0064] (3) Prepare 100mL of zirconia slurry, wherein the volume content of zirconia ceramic powder is 50vol.%, the content of photosensitive resin...

Embodiment 3

[0069] (1) Design a two-dimensional isosceles triangular structure ceramic material component with alumina as the base and silicon carbide as the hypotenuse, then α in formula (1) b =8.2×10 -6 / °C,α h =2.6×10 -6 / °C, according to the formula (1), the relationship between the half top angle and the equivalent thermal expansion can be obtained, when the design value is selected as 0.73×10 -6 / °C, the half top angle is 30°.

[0070] (2) Prepare 100mL of alumina slurry, wherein the volume content of alumina ceramic powder is 55vol.%, the content of photosensitive resin is 45vol.%, and the amount of polymer dispersant KOS110 is 3wt% of the amount of alumina ceramic powder. The addition amount of initiator TPO is 2wt% of the amount of photosensitive resin, the sintering aid titanium dioxide is 2wt% of the amount of alumina ceramic powder, and the amount of magnesium oxide is 2wt% of the amount of alumina ceramic powder. The alumina slurry can be obtained after ball milling for 14...

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Abstract

The invention discloses a preparation method of a ceramic material member with adjustable thermal expansion and its product. The method comprises the following steps: preparation of ceramic slurry, preparation of a functional gradient transition layer and photocuring 3D printing. The present invention uses two kinds of ceramic materials with high temperature resistance and positive thermal expansion coefficient as raw materials, and designs a multi-ceramic structure with adjustable thermal expansion to realize the height direction of the ceramic material components with two-dimensional isosceles triangular structure and three-dimensional regular pyramid structure. Supernormal design of negative expansion, zero expansion and large positive expansion; use ceramic material 3D printing technology to prepare multi-ceramic structures, and apply functional gradient transition layer to release thermal mismatch stress to solve the thermal mismatch problem between multi-phase ceramics. The ceramic material component prepared by the invention has the characteristic of adjustable thermal expansion and can serve under high temperature conditions.

Description

technical field [0001] The invention belongs to the technical field of 3D printing and molding, and in particular relates to a preparation method of a thermal expansion-adjustable ceramic material component and a product thereof. Background technique [0002] Thermal expansion is an important intrinsic physical behavior of solid materials at ambient temperature. In most cases, almost all natural solids, including metals, polymers, and ceramics, exhibit positive thermal expansion behavior. However, with the rapid development of cutting-edge technology industries such as aerospace, nuclear energy and high-temperature precision equipment, higher requirements are placed on the shape accuracy of materials or structures under large-span temperature changes. The rapid development of these applications urgently requires the stability and reliability of components not to be damaged by thermal expansion. Therefore, in order to meet this requirement, it is urgent to develop materials...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/622C04B35/10C04B35/48C04B35/14C04B35/565C04B35/584C04B35/582B33Y70/10B33Y10/00
CPCB33Y10/00B33Y70/10C04B35/10C04B35/14C04B35/48C04B35/565C04B35/581C04B35/584C04B35/622C04B2235/94C04B2235/9607
Inventor 何汝杰张可强方岱宁张路张学勤
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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