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Method for Synthesizing Sialon-Corundum Composite Material Using Reused Skateboard Bricks and Silicon and Aluminum Powder

A technology of composite materials and sliding bricks, which is applied in the field of preparation of structural ceramics and refractory materials, to achieve the effects of improving toughness and mechanical properties, low synthesis cost, and easy large-scale production

Active Publication Date: 2011-12-07
SHOUGANG CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] There have been reports on the synthesis of SiAlON by using refractory materials (Wang Xidong, Zhang Mei, etc.; using waste Al 2 o 3 -SiC-C quality iron channel material to prepare the method of sialon ceramic material, Chinese patent: CN1887798 2007), but the sialon-corundum (β-SiAlON-Al 2 o 3 ) Composite materials have not been reported

Method used

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  • Method for Synthesizing Sialon-Corundum Composite Material Using Reused Skateboard Bricks and Silicon and Aluminum Powder
  • Method for Synthesizing Sialon-Corundum Composite Material Using Reused Skateboard Bricks and Silicon and Aluminum Powder
  • Method for Synthesizing Sialon-Corundum Composite Material Using Reused Skateboard Bricks and Silicon and Aluminum Powder

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Embodiment 1

[0020] One of the more specific methods of the present invention is:

[0021] (1) Mix raw materials according to the formula: the formula is according to the mass percentage: used skateboard brick powder, 50%; used silicon powder, 40%; aluminum powder, 10%.

[0022] (2) Mixing: mill the mixed raw materials in a planetary ball mill for 6 hours until the particle size is less than 5 μm.

[0023] (3) Drying: put into a drying oven at 100° C. for 4 hours.

[0024] (4) Pressure molding: Add carboxymethyl cellulose sodium binder in a ratio of 0.5ml / 10g, mix well, and press molding under a pressure of 100MPa.

[0025] (5) High-temperature heat treatment: pass ordinary nitrogen (99.95%), the nitrogen pressure is 0.1 MPa, the temperature is 1600° C., and the holding time is 4 hours.

[0026] Structural characterization of materials obtained by heat treatment: XRD results show ( figure 2 ) The main crystal phase of the synthetic material is β-SiAlON phase, and the secondary crystal ...

Embodiment 2

[0028] Two of the more specific methods of the present invention are:

[0029] (1) Mixing raw materials according to the formula: the formula is according to the mass percentage: used skateboard brick powder, 60%; used silicon powder, 25%; aluminum powder, 15%.

[0030] (2) Mixing: mill the mixed raw materials in a planetary ball mill for 6 hours until the particle size is less than 5 μm.

[0031] (3) Drying: put into a drying oven at 100° C. for 4 hours.

[0032] (4) Pressure molding: Add carboxymethyl cellulose sodium binder in a ratio of 0.5ml / 10g, mix well, and press molding under a pressure of 100MPa.

[0033] (5) High-temperature heat treatment: pass ordinary nitrogen (99.95%), the nitrogen pressure is 0.1 MPa, the temperature is 1650° C., and the holding time is 4 hours.

[0034] Structural characterization of materials obtained by heat treatment: XRD results show ( Figure 4 ) The main crystal phase of the synthetic material is β-SiAlON phase, and the secondary crys...

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Abstract

The invention discloses a method for synthesizing a sialon-corundum composite material by using recycled sliding bricks and silicon and aluminum powder, which relates to the technical field of preparation technology of structural ceramics and refractory materials. Use 50-70% of used skateboard brick powder as raw material, add 10-20% aluminum powder and 20-40% silicon powder respectively, and process multiple steps of mixing, drying, pressure molding and heating and sintering to prepare Sialon-corundum Composite material; XRD results show that the main crystal phase of the synthetic material is the sialon β-SiAlON phase, and the secondary crystal phase is the corundum Al2O3 phase; the fracture SEM photo shows that the β-SiAlON phase is a columnar crystal, which is conducive to improving the toughness and mechanical properties of the synthetic material . The advantages are that the preparation cost is reduced and the industrial production is easy.

Description

technical field [0001] The invention relates to the technical field of preparation technology of structural ceramics and refractory materials, in particular to a method for synthesizing a sialon-corundum composite material by using recycled sliding bricks and silicon and aluminum powders. Realize the recovery and reuse of used refractory materials. Background technique [0002] Sialon (β-SiAlON) is β-Si 3 N 4 with AlN, Al 2 o 3 solid solution, due to the β-Si 3 N 4 The same structure, so its physical properties and Si 3 N 4 similar, and because of the large amount of Al 2 o 3 , so the chemical properties are close to those of Al 2 o 3 , has good antioxidant properties. As a new type of material, Sialon (β-SiAlON) composite material has been used in many fields such as abrasive tools and metal cutting tools, refractory materials, transparent ceramics, biomaterials, etc., especially Sialon (β-SiAlON) combined with corundum bricks due to With good high temperature ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66
Inventor 赛音巴特尔廖洪强余广炜冯向鹏李世青周宇王习东张梅岳昌盛彭犇
Owner SHOUGANG CORPORATION