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Method for synthesizing Al-Si-C alloy

A synthesis method, a technology of aluminum silicon carbon, applied in the field of high temperature ceramic materials

Active Publication Date: 2010-09-29
河南益丰高温材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] So far, there is no report on the synthesis of AlSiC from oxides in an air atmosphere

Method used

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  • Method for synthesizing Al-Si-C alloy
  • Method for synthesizing Al-Si-C alloy
  • Method for synthesizing Al-Si-C alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The size of the resistance furnace is 1m×0.5m×0.5m, and the power of the resistance furnace is 250KVA.

[0034] like Figure 4 AlSiC synthesis process shown:

[0035] Raw materials are batched and crushed according to the following mass percentages:

[0036]Sintered corundum sand (98%): particle size 0.1mm 60%

[0037] Quartz sand (99%): particle size 2mm 12%

[0038] Carbon black (93%): particle size ≤ 1mm 26%

[0039] Industrial salt: particle size ≤1mm 2%

[0040] Note: The percentages in parentheses behind the above raw materials represent the purity (quality) of the corresponding raw materials, and the following are similar.

[0041] After weighing the raw materials, add them into the mixer and stir, add water while stirring, and stir for 5 minutes. The mixed raw materials are loaded into the furnace. Start heating at room temperature, increase to the highest power within 2 hours, and maintain the highest power of 250KVA (the fluctuation of the actual power ...

Embodiment 2

[0044] The size of the resistance furnace is 1m×0.5m×0.5m, and the power of the resistance furnace is 300KVA.

[0045] like Figure 4 AlSiC synthesis process shown:

[0046] Raw materials are batched and crushed according to the following mass percentages:

[0047] Al 2 o 3 Fine powder (99%): particle size 0.1mm 60%

[0048] Quartz sand (99%): particle size 2mm 12%

[0049] Carbon black (97%): particle size ≤ 1mm 26%

[0050] Sawdust: particle size ≤ 2mm 2%

[0051] After weighing the raw materials, add them into the mixer and stir, add water while stirring, and stir for 5 minutes. The mixed raw materials are loaded into the furnace. Start heating at room temperature, increase to the highest power within 2 hours, maintain the highest power of 300KVA (the fluctuation of the actual power does not exceed ±5%), and heat for 5 hours. The reaction temperature is about 2600 ° C. After the power is turned off and cooled, the furnace wall is removed. Remove the loose part of t...

Embodiment 3

[0054] The size of the resistance furnace is 1m×0.5m×0.5m, and the power of the resistance furnace is 350KVA.

[0055] like Figure 4 AlSiC synthesis process shown:

[0056] Raw materials are batched and crushed according to the following mass percentages:

[0057] Al 2 o 3 Fine powder (99%): particle size 0.1mm 60%

[0058] Quartz sand (99%): particle size 2mm 12%

[0059] Carbon black (95%): particle size ≤ 1mm 25%

[0060] Industrial salt: particle size ≤1mm 1%

[0061] Sawdust: particle size ≤ 3mm 2%

[0062] After weighing the raw materials, add them into the mixer and stir, add water while stirring, and stir for 5 minutes. The mixed raw materials are loaded into the furnace. Start heating at room temperature, increase to the highest power within 2 hours, and maintain the highest power of 350KVA (the fluctuation of the actual power does not exceed ± 5%) and heating for 5 hours, the reaction temperature is about 2700 ° C, after the power is turned off and cooled, ...

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Abstract

The invention belongs to the technical field of high temperature ceramic materials, and discloses a method for synthesizing an Al-Si-C alloy. Al2O3 and SiO2 are taken as raw materials, and C is taken as a reducing agent; and the method comprises the following steps of: heating to a temperature of between 2,500 and 3,200 DEG C in the air atmosphere and performing synthesis for 5 to 72 hours, and cooling to obtain the Al-Si-C alloy, wherein the alloy comprises the raw materials in percentage by mass: 50 to 60 percent of Al2O3, 10 to 20 percent of SiO2 and 25 to 35 percent of C. The method makes the Al-Si-C alloy possible to be applied on a large scale; and the synthesized Al-Si-C alloy can be applied in the fields of high temperature ceramic components, high-temperature coatings on the surfaces of aircrafts, container linings for metal smelting, high temperature heaters, and the like.

Description

technical field [0001] The invention belongs to the technical field of high-temperature ceramic materials, and in particular relates to a synthesis method of aluminum silicon carbon. Background technique [0002] Barczak first reported AlSiC (Al 4 SiC 4 )The presence. Aluminum silicon carbon has high thermal conductivity (80W·m -1 ·K -1 ), the bending strength at high temperature is 50% greater than the bending strength at room temperature (bending strength at room temperature and 1300°C are 297.1MPa and 449.7MPa respectively), after high temperature oxidation, a dense high temperature resistant protective film (corundum and mullite) is formed on the surface to prevent aluminum Further oxidation inside the silicon carbon can still be used stably at 1800°C in an oxidizing atmosphere, making it suitable as a high-temperature ceramic material. The resistivity of AlSiC decreases with the increase of temperature (the resistivities at 100°C and 1000°C are 1.14×10 4 Ω·cm and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/56C04B35/622
Inventor 赵建立白周义白春丽
Owner 河南益丰高温材料股份有限公司