Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for producing high-purity aluminum-silicon-carbon powder by taking waste refractory material as raw material

A technology of aluminum silicon carbon and powder, which is applied in the field of producing high-purity aluminum silicon carbon powder, which can solve the problems of high price of aluminum silicon carbon, high cost of raw materials, and inability to apply large-scale industrial applications, so as to achieve high purity and reduce production costs , to achieve the effect of recycling

Inactive Publication Date: 2011-10-12
TSINGHUA UNIV
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the existing AlSiC synthesis methods all use metals or carbides as raw materials, and the high cost of raw materials results in high prices for the synthesized AlSiC, which cannot be used in large-scale industrial applications.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for producing high-purity aluminum-silicon-carbon powder by taking waste refractory material as raw material
  • Method for producing high-purity aluminum-silicon-carbon powder by taking waste refractory material as raw material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1, synthetic aluminum silicon carbon powder body

[0022] The selected formula is: white corundum brick (average particle size 0.2mm): coke oven silica brick (average particle size 0.2mm): self-baked carbon block for blast furnace (average particle size 0.2mm) = 58:15:27 (mass ratio), weigh Measure the ingredients and dry mix them in a ball mill to obtain a mixture. Put the mixture into a graphite crucible, put the graphite crucible into an electric furnace, and heat it at 2700°C for 5 hours in a CO protective atmosphere at 1 atmosphere pressure. After cooling, remove the impurity-enriched layer on the upper surface to obtain aluminum silicon carbon powder. . The particle size of the obtained aluminum-silicon carbon powder is 50-150 μm in length and width, and 5-8 μm in thickness. Al in the aluminum-silicon carbon powder 4 SiC 4 The content is 99.3%. The scanning electron microscope photo of the aluminum silicon carbon powder body is as follows figure 2...

Embodiment 2

[0024] Embodiment 2, synthetic aluminum silicon carbon powder body

[0025] The selected formula is: fused corundum brick (average particle size 0.1mm): hot blast furnace silica brick (average particle size 0.1mm): roasted carbon block for blast furnace (average particle size 0.1mm) = 49:18:33 (mass ratio), weigh Measure the ingredients and dry mix them in a ball mill to obtain a mixture. Put the mixture into a graphite crucible, put the graphite crucible into an electric furnace, and heat it at 2500°C for 4 hours in a CO protective atmosphere at 1 atmosphere pressure. After cooling, remove the impurity-enriched layer on the upper surface to obtain aluminum silicon carbon powder. . The particle size of the obtained aluminum-silicon carbon powder is 50-150 μm in length and width, and 5-8 μm in thickness. Al in the aluminum-silicon carbon powder 4 SiC 4 The content is 99.1%.

Embodiment 3

[0026] Embodiment 3, synthetic aluminum silicon carbon powder body

[0027] The selected formula is: white corundum brick (average particle size 0.01mm): glass kiln silica brick (average particle size 0.01mm): carbon block for electric furnace (average particle size 0.01mm) = 54:16:30 (mass ratio), and weigh the ingredients , dry mixing in a ball mill to obtain a mixture. Put the mixture into a graphite crucible, put the graphite crucible into an electric furnace, and heat it at 2300°C for 6 hours in a CO protective atmosphere at 1 atmosphere pressure. After cooling, remove the impurity-enriched layer on the upper surface to obtain aluminum silicon carbon powder. . The average particle size of the obtained aluminum-silicon carbon powder is 50-150 μm in length and width, and 5-8 μm in thickness. Al in the aluminum-silicon carbon powder 4 SiC 4 The content is 99.1%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
electrical resistivityaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for preparing aluminum-silicon-carbon powder. The method comprises the following steps of: (1) weighing 49-60 percent by mass of corundum brick, 14-18 percent by mass of silicon brick and 26-33 percent by mass of carbon block serving as raw materials and mixing the raw materials to obtain a mixture; and (2) heating the mixture under CO protective atmosphere of 1 atmospheric pressure at the temperature between 2,300 DEG C and 2,800 DEG C for 4-6 hours, cooling and removing an impurity layer from the surface of a product to obtain aluminum-silicon-carbon powder. In the method, a waste refractory material is taken as a raw material, so that the production cost is lowered and the recycling of resources is realized; moreover, the method is simple, convenient and feasible and is suitable for large-scale production; and the yield and the purity of the obtained product are high.

Description

technical field [0001] The invention relates to the field of ceramic materials, in particular to a method for producing high-purity aluminum-silicon-carbon powder by using waste refractory materials as raw materials. 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 high temperature bending strength is 50% higher than the room temperature bending strength, after high temperature oxidation, a dense high temperature resistant protective film (corundum and mullite) is formed on the surface to prevent further oxidation inside the aluminum silicon carbon, and it can still be used at 1800 °C in an oxidizing atmosphere Stable use, so it is 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 1.71×10 -1 Ω·cm), suitable for making high-temper...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/515C04B35/626B09B3/00
Inventor 赵建立汪长安黄勇白春丽白周义
Owner TSINGHUA UNIV