Effective method for preparing multi-size annular mullite

A multi-dimensional, annular technology, applied in chemical instruments and methods, polycrystalline material growth, condensed steam, etc., can solve the problems of single product form, long processing time, difficult processing such as cutting, grinding, polishing, etc.

Inactive Publication Date: 2021-01-19
NANTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Because moissanite is very hard, the closest to diamond, and brittle, it is difficult to cut, grind, polish, etc., and the processing cost accounts for a large proportion of the overall price.
Especially difficult when processing bulk moissanite into small, non-linear gemstone

Method used

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  • Effective method for preparing multi-size annular mullite
  • Effective method for preparing multi-size annular mullite

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Embodiment Construction

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention, so that those skilled in the art can better understand the advantages and features of the present invention, so as to define the protection scope of the present invention more clearly. The embodiments described in the present invention are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other implementations obtained by those of ordinary skill in the art without creative work For example, all belong to the protection scope of the present invention.

[0020] Aiming at the above-mentioned difficulties existing in the prior art, the present invention provides an effective method for preparing multi-size annular moissanite, by using a silicon carbide single crystal substrate-multi-size annular graphite cylinder composite substrate, the composite substrate The growt...

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Abstract

The invention discloses an effective method for preparing multi-size annular mullite, which comprises the following steps: using a silicon carbide single crystal substrate multi-size annular graphitecylinder composite substrate; adhering the back surface of the composite substrate to the inner layer of a graphite crucible cover, adhering an annular graphite cylinder to the growth surface of the substrate, putting a high-purity silicon carbide raw material into the bottom in a graphite crucible, and performing crystal growth by adopting a physical vapor transport method to obtain the annular mullite, so the annular mullite can be more conveniently processed into annular ornaments with different pore diameters.

Description

technical field [0001] The invention relates to a method for preparing moissanite, in particular to a method for preparing multi-size annular moissanite. Background technique [0002] Gemstones are a common worn or decorative accessory. Gemstone jewelry is divided into natural gemstones and artificial gemstones. Natural gemstones are difficult to be widely used in the jewelry market due to their small reserves and high impurity content. Very few relatively pure natural gemstones can be used for jewelry processing, but their prices are extremely expensive. [0003] Moissanite, also known as moissanite or silicon carbide gemstone, is second only to diamond in hardness, so it is difficult to wear and corrode, and Moissanite of different colors can be obtained through different doping in the preparation process. Moissanite has a high refractive index and excellent thermal stability, making it a good substitute for natural gemstones. Natural moissanite was discovered by humans ...

Claims

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Application Information

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IPC IPC(8): C30B29/36C30B23/02
CPCC30B23/02C30B23/025C30B29/36
Inventor 杨培培李祥彪仲崇贵
Owner NANTONG UNIVERSITY
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