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High-temperature thermal shock resistant ceramic material and preparation method thereof

A technology of thermal shock resistance and ceramic materials, which is applied in the field of ceramic materials, can solve problems such as poor corrosion resistance, spalling, and poor thermal shock resistance at high temperatures, and achieve the effects of lowering temperature, increasing conversion degree, and increasing strength

Active Publication Date: 2022-05-06
SHANDONG RES & DESIGN ACADEMY OF IND CERAMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above problems, the present invention provides a high-temperature thermal shock-resistant ceramic material and its preparation method to solve the problem of high-temperature heat-resistant ceramic materials prepared in the prior art. Poor shock resistance, poor corrosion resistance, easy to crack, peel off, short life, etc.

Method used

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  • High-temperature thermal shock resistant ceramic material and preparation method thereof

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preparation example Construction

[0018] The invention provides a method for preparing a high-temperature thermal-shock-resistant ceramic material, which comprises the following steps: mixing ceramic powder and an organic binder at a weight ratio of 1: (0.1-0.2) to obtain ceramic feed; injecting Molding method The ceramic feed is molded, the injection pressure is 20-80MPa, and the injection temperature is 120-180°C; after the ceramic feed is molded, the obtained body is heated at a rate of 10-20°C / h to Heat at 450-550°C for 5-7 hours, and carry out debinding treatment; after degumming, heat up to 1150-1320°C at a rate of 120-180°C / h for 2-6 hours, then sinter.

[0019] Wherein, the organic binder includes organic glass, polystyrene, High density polyethylene, microcrystalline wax powder and dispersant. The dispersant is one or more of stearic acid, oleic acid, and carboxystearic acid. The ceramic powder includes, by weight, 31-53 parts of fused quartz, 25-45 parts of platy corundum powder, 20-35 parts of alu...

Embodiment 1

[0022] This embodiment provides a method for preparing a high-temperature thermal shock-resistant ceramic material, comprising the following steps:

[0023] In parts by weight, take 14 parts of the first fused silica, 16 parts of the second fused silica, 5 parts of the third fused silica, 2 parts of the fourth fused silica, 12 parts of plate-shaped corundum powder with a particle size of 0.18 to 0.1 mm, 20 parts of tabular corundum powder with a particle size of 0.045 mm, 30 parts of alumina micropowder, and 1 part of silicon nitride micropowder were put into a horizontal ceramic ball mill for ball milling for 5 hours to obtain a premix.

[0024] Add organic binder to the above premix, banbury uniformly at 150°C, and after banbury, cut into pellets with a diameter of 1-3 mm and a height of 1-5 mm to obtain ceramic feed; among them, the organic binder The weight is 10% of the total mass of the above-mentioned ceramic powder, and the weight ratio of plexiglass, polystyrene, high...

Embodiment 2

[0029] This embodiment provides a method for preparing a high-temperature thermal shock-resistant ceramic material, comprising the following steps:

[0030] In parts by weight, take 10 parts of the first fused silica, 18 parts of the second fused silica, 8 parts of the third fused silica, 3 parts of the fourth fused silica, 15 parts of plate-shaped corundum powder with a particle size of 0.18 to 0.1 mm, 18.5 parts of tabular corundum powder with a particle size of 0.045 mm, 26 parts of alumina micropowder, and 1.5 parts of silicon nitride micropowder were put into a horizontal ceramic ball mill and ball milled for 5 hours to obtain a premix.

[0031] Add an organic binder to the above premix, banbury uniformly at 180°C, and after banbury, cut into pellets with a diameter of 1-3 mm and a height of 1-5 mm to obtain ceramic feed; among them, the organic binder The weight is 15% of the total mass of the ceramic powder, and the weight ratio of organic glass, polystyrene, high-densi...

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Abstract

The invention discloses a preparation method of a high-temperature thermal shock resistant ceramic material, which comprises the following steps: mixing ceramic powder with an organic binder to obtain a ceramic feed; and molding the ceramic feed, discharging glue, and sintering, thereby obtaining the product. Wherein the ceramic powder is prepared from the following components in parts by weight: 31 to 53 parts of fused quartz, 25 to 45 parts of tabular corundum powder, 20 to 35 parts of aluminum oxide micro powder and 0.5 to 1.5 parts of silicon nitride micro powder. The ceramic material prepared by the method has good high-temperature thermal shock resistance.

Description

technical field [0001] The invention belongs to the field of ceramic materials, and in particular relates to a high-temperature thermal shock-resistant ceramic material and a preparation method thereof. Background technique [0002] The development of aerospace has higher and higher requirements for the smelting industry, such as smelting refractory metals, preparing special alloys or ultra-pure metals, etc. During the use of smelting utensils, they must continuously withstand cold and thermal shocks and slag corrosion of smelting materials. [0003] As one of the commonly used materials for smelting utensils, ceramic materials need to have good thermal shock stability, corrosion resistance and spalling resistance. However, the ceramic materials currently produced have poor high temperature thermal shock resistance, short service life, and poor corrosion resistance, which are difficult to meet the requirements, which greatly restricts the development of my country's aviation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B35/632C04B35/634C04B35/638
CPCC04B35/10C04B35/63448C04B35/63408C04B35/632C04B35/638C04B2235/3873C04B2235/3418C04B2235/6562C04B2235/6567C04B2235/96
Inventor 徐先豹李伶张永翠
Owner SHANDONG RES & DESIGN ACADEMY OF IND CERAMICS
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