Method for producing silicon carbide (SiC) ceramics by polysilicon wire-electrode cutting scraps

A technology for silicon carbide ceramics and cutting waste, applied in the field of preparing silicon carbide ceramics, can solve problems such as lack of utilization value, and achieve the effects of reducing production cost and simple preparation process

Inactive Publication Date: 2016-05-11
SHAANXI JUJIEHAN CHEM CO LTD
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

Therefore, the residue after recycling the cutting slurry contains a large amount of silicon powder, silicon carbide abrasives that have not been separated thoroughly, and s

Method used

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Experimental program
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Example Embodiment

[0009] Specific embodiment: After mixing the silicon carbide and the cutting waste at a mass ratio of 1:9, the mixture is put into a resin ball milling tank for ball milling, and the ball milling time is 15 minutes. After the mixture is granulated and aged through a 40-mesh screen, it is placed in a mold at a pressure of 10Mpa, and then placed in a vacuum furnace for firing. The firing process is as follows: heat up to 300°C at 2°C / min The temperature is kept for 30 minutes, then the temperature is raised to 1420°C at 3°C / min and the temperature is kept for 10 minutes, and finally the temperature is lowered to 1000°C at 5°C / min, and then the electric furnace is turned off to cool down naturally to the chamber to obtain silicon carbide ceramics.

[0010] The method uses polysilicon wire cutting waste as a raw material, the preparation process is simple, and the production cost is reduced.

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Abstract

The invention discloses a method for producing silicon carbide (SiC) ceramics by polysilicon wire-electrode cutting scraps and belongs to the field of production of functional materials, aiming to solve the problem that scraps are always discarded directly at present. The method includes adding SiC powder to a raw material, namely the polysilicon wire-electrode cutting scraps, and then sintering the mixture to obtain the SiC ceramics. As the polysilicon wire-electrode cutting scraps are taken as the raw material for producing the SiC ceramics, production process is simplified and production cost is lowered.

Description

technical field [0001] The invention belongs to the field of preparation of functional materials, and in particular relates to a method for preparing silicon carbide ceramics by using polysilicon wire cutting waste as a raw material. Background technique [0002] With the increasing investment of the international community in the solar photovoltaic industry, the production of polysilicon for solar energy has entered a period of rapid development. Data show that in recent years, the global solar-grade polysilicon has developed rapidly at an annual growth rate of 40% to 50%. my country is one of the fastest growing countries in the solar photovoltaic industry. According to statistics, 35 large-scale polysilicon projects were planned in 17 provinces and cities between 2007 and 2009. According to preliminary statistics, the production capacity has exceeded 55,000 tons. It is estimated that by 2011, China's photovoltaic polysilicon The output will account for about 34% of the wo...

Claims

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Application Information

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IPC IPC(8): C04B35/573
CPCC04B35/573C04B35/6261C04B35/63448C04B2235/428C04B2235/48C04B2235/6562C04B2235/6567C04B2235/6581
Inventor 李长英
Owner SHAANXI JUJIEHAN CHEM CO LTD
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