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Composite material for burner sleeve and preparation method thereof

A technology of composite materials and raw materials, applied in the field of ceramic materials, can solve the problems of short service life of the burner sleeve, and achieve the effect of easy operation and simple operation

Active Publication Date: 2022-05-13
鼎固新材料(天津)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the above-mentioned defects or deficiencies in the prior art, this application aims to provide a composite material for burner sleeves and its preparation method, which can solve the problem of short service life of burner sleeves and better meet the needs of use

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A silicon nitride-silicon carbide composite material for a burner sleeve is mainly made of the following raw materials in terms of mass percentage: 70% of silicon nitride powder with a particle size of 0.5-2 μm, 13% of carbon powder with a particle size of 1-3 μm, sintered Auxiliary 17%, the rest are inevitable impurities. The sintering aids include the following components by mass percentage: 3.5% alumina powder with a particle size of 0.1~0.8μm, 13% yttrium oxide powder with a particle size of 0.1~0.5μm, 0.5% boron carbide with a particle size of 2~4μm, and the rest for unavoidable impurities. The percentage content of the above components is the percentage of the mass of each component in the total mass of all the raw materials of the silicon nitride-silicon carbide composite material for the burner sleeve.

[0032] like figure 1 As shown, the preparation process of the silicon nitride-silicon carbide composite material for the burner sleeve includes the following ...

Embodiment 2

[0043] A silicon nitride-silicon carbide composite material for a burner sleeve is mainly made of the following raw materials in terms of mass percentage: 85% of silicon nitride powder with a particle size of 0.5-2 μm, 5% of carbon powder with a particle size of 1-3 μm, sintered Additives are 10%, and the rest are inevitable impurities. The sintering aids include the following components by mass percentage: 4.9% alumina powder with a particle size of 0.1~0.8μm, 5% yttrium oxide powder with a particle size of 0.1~0.5μm, 0.1% boron carbide with a particle size of 2~4μm, and the rest for unavoidable impurities. The percentage content of the above components is the percentage of the mass of each component in the total mass of all the raw materials of the silicon nitride-silicon carbide composite material for the burner sleeve.

[0044] like figure 1 As shown, the preparation process of the silicon nitride-silicon carbide composite material for the burner sleeve includes the foll...

Embodiment 3

[0055] A silicon nitride-silicon carbide composite material for a burner sleeve is mainly made of the following raw materials in terms of mass percentage: 75% of silicon nitride powder with a particle size of 0.5-2 μm, 10% of carbon powder with a particle size of 1-3 μm, sintered Additives are 15%, and the rest are inevitable impurities. The sintering aids include the following components by mass percentage: 4.7% alumina powder with a particle size of 0.1~0.8μm, 10% yttrium oxide powder with a particle size of 0.1~0.5μm, 0.3% boron carbide with a particle size of 2~4μm, and the rest for unavoidable impurities. The percentage content of the above components is the percentage of the mass of each component in the total mass of all the raw materials of the silicon nitride-silicon carbide composite material for the burner sleeve.

[0056] like figure 1 As shown, the preparation process of the silicon nitride-silicon carbide composite material for the burner sleeve includes the fo...

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Abstract

The invention provides a composite material for a burner sleeve and a preparation method thereof, and belongs to the technical field of ceramic materials, the composite material is prepared from the following components by mass: 70-85% of silicon nitride powder, 5-13% of carbon powder, 10-17% of a sintering aid, and the balance unavoidable impurities. A prepared mixture is pressed into a preformed blank through a cold isostatic pressing method, the preformed blank is subjected to a reaction in a vacuum atmosphere to obtain a reaction blank, finally, the reaction blank is subjected to high-temperature sintering to obtain the silicon nitride-silicon carbide composite material for the burner sleeve, the density of the silicon nitride-silicon carbide composite material is 3.21-3.36 g / cm < 3 >, the room-temperature bending strength is 400-600 MPa, the high-temperature bending strength at 1300 DEG C reaches 320-500 MPa, the service life is remarkably prolonged, and the silicon nitride-silicon carbide composite material is suitable for the burner sleeve. And moreover, the preparation process is simple, and is suitable for batch production.

Description

technical field [0001] The invention relates to the technical field of ceramic materials, in particular to a composite material for a burner sleeve and a preparation method thereof. Background technique [0002] Most of the burner sleeves are in harsh environments such as high temperature and high pressure during the working process. The chemical properties of the transported substances are relatively active and chemical reactions are prone to occur, so the requirements for materials are relatively strict. At present, the commonly used burner sleeve material is reactive sintered silicon carbide material. However, due to the existence of a large amount of free silicon, the operating temperature is not higher than 1350 ° C, the service life is about 3 months, and the highest service life is only 6 months. Frequent replacement of burner sleeves can affect production and energy consumption indicators. Patents such as CN214332689U and CN203754658U are all reformed from the persp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/584C04B35/66
CPCC04B35/584C04B35/66C04B2235/3225C04B2235/3821C04B2235/3217C04B2235/422C04B2235/5445C04B2235/5436C04B2235/77C04B2235/96C04B2235/9607
Inventor 苏国平刘桂荣苏浩然杨义兵刘新元胡振华
Owner 鼎固新材料(天津)有限公司