A method for analyzing the change of silicon carbide particles before and after mortar cutting

Abstract

The invention relates to a method for analyzing changes of silicon carbide particles before and after mortar cutting. The method for analyzing the changes of the silicon carbide particles before and after mortar cutting comprises the steps that waste mortar generated after polycrystalline silicon is cut is treated, and impurities including silicon powder and iron powder are removed; then the waste mortar is dispersed in a dispersing agent, so that the agglomeration phenomenon is eliminated; and the particle sizes and roundness of the silicon carbide particles in the mortar after dispersing and before cutting are measured, a chart is drawn in particle proportion based on obtained data for comparison, and the effective cutting roundness and the effective cutting particle size in the cutting process are obtained through analysis. According to the method for analyzing the changes of the silicon carbide particles before and after mortar cutting, silicon carbide particles within the effective cutting range can be selected for cutting different polycrystalline silicon materials, production is effectively guided, reasonable and flexible adjustment is conducted, the utilization rate and cutting efficiency of silicon carbide are improved, and cost is reduced. Meanwhile, the method has certain guiding significance for production and purchasing of novel sand, waste can be effectively avoided by screening, discriminating and selecting batches with the higher cutting capacity, production cost is reduced, and the method has good economic benefits and broad application prospects.

Description

technical field [0001] The invention relates to the field of material cutting and processing, in particular to a method for analyzing the change of silicon carbide particles before and after mortar cutting. Background technique [0002] Due to its stable chemical properties, high hardness, and good wear resistance, silicon carbide is widely used in the slicing process of various hard and brittle materials. The existing polysilicon cutting technology is to mix silicon carbide and cutting fluid to make mortar. When cutting, the silicon carbide is cut by rolling and scraping the silicon block under the high-speed movement of the cutting line. Compared with before cutting, the particle size of silicon carbide particles decreases and the roundness increases after cutting. [0003] In the actual cutting process, the distribution of silicon carbide particles is closely related to the cutting ability. Silicon carbide particles with large particle size and low roundness value have ...

AI Technical Summary

Problems solved by technology

[0004] In the process of cutting polysilicon, because the mortar continuously scrapes the silicon rod during the cutting process, a lot of silicon powder and iron powder worn on the surface of the cutting line will fall off. These small components seriously affect the judgment of the silicon carbide particles in the mortar, and also damage to the measuring instrument

The components in the mortar become complicated and interfere with the subsequent measurement of silicon carbide particles. Therefore, the existing detection methods generally only detect the finished mortar, but do not measure and analyze the silicon carbide particles in the waste mortar after cutting.

Images