Method for preparing synthetic silicon carbide cat eye

Abstract

The invention discloses a method for preparing a synthetic silicon carbide cat eye. A path for effectively utilizing waste produced in the silicon carbide production process is provided. The method comprises the steps that a synthetic silicon carbide single crystal block containing a set of micropipes which are densely and directionally arranged in parallel is selected; the selected synthetic silicon carbide single crystal block is observed under a microscope, and the direction and size of the micropipes (1) are measured; according to the measured direction and size of the micropipes (1), the selected synthetic silicon carbide single crystal block is cut to be in the shape of a hemisphere (2), the spherical radius R of the hemisphere (2) and the height F of the section of the hemisphere achieve the relation: F=R / (n-1), and n is the refractive index of the synthetic silicon carbide; the bottom face of the hemisphere is parallel to the measured micropipes, and the long axis (4) of the bottom face (3) of the hemisphere is perpendicular to the direction of the micropipes; the synthetic silicon carbide cat eye is obtained. Silicon carbide single crystal waste in the production process is effectively utilized, and the high-value artificial stone is manufactured.

Description

technical field [0001] The invention relates to a method for preparing artificial gemstones, in particular to a method for preparing silicon carbide cat's eyes by artificial synthesis, and belongs to the technical field of artificial gemstones. Background technique [0002] The so-called cat's eye effect refers to the fact that a cabochon-cut gemstone presents a bright band of light that can rotate with the rotation of the gemstone or light when illuminated by parallel light. Some gemstone raw materials have a group of dense, parallel and oriented fibrous, needle-shaped or flaky inclusions. The arc-shaped processing angle of the gemstone can be designed according to the arrangement of the gemstone’s internal inclusions. The height of the surface, the bottom plane and other parameters can be used to obtain gemstones with cat's eye effect. Silicon carbide is a synthetic material, and the physical vapor transport method is a general method for preparing silicon carbide single ...

AI Technical Summary

Problems solved by technology

However, in the process of growing silicon carbide using this method, due to the defects of the seed crystal itself, the influence of temperature, pressure and gas flow conditions during the growth process, a hollow needle-shaped defect is often formed inside the synthetic silicon carbide, called Silicon carbide crystals with micropipes generally cannot be used in the preparation process of semiconductor devices, and are generally treated as waste products

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