Method for preparing synthetic sapphire by micro-pulling and shoulder-expanding at cooled center

A technology for sapphire and sapphire crystals, which is applied in the direction of self-melt pulling method, chemical instruments and methods, single crystal growth, etc., which can solve the problems of easy contamination of crystals, easy occurrence of bubbles, high cost, etc., to ensure the quality of single crystal growth , Prevent crystal cracking and reduce growth cost

Pending Publication Date: 2017-07-28
NINGXIA PROCRYSTAL TECH CO LTD
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Problems solved by technology

[0007] The purpose of the present invention is to: aiming at the above-mentioned problems existing at present, the inventor proposes a kind of cold-heart shoulder-lifting preparation method for artificial sapphire after careful study, so as to solve the problem that the crystal in the prior art is easily polluted and the cost is low. Higher, deficiencies and defects prone to bubbles inside the crystal

Method used

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  • Method for preparing synthetic sapphire by micro-pulling and shoulder-expanding at cooled center

Examples

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Embodiment 1

[0036] Example 1, such as figure 1 Shown:

[0037] A kind of preparation method that is used for artificial sapphire cold shoulder lifting, comprises the steps:

[0038] (1) Preparatory work: Before pulling and preparing sapphire crystals, it is necessary to thoroughly check whether there are foreign objects or impurities in the furnace, and clean them up; because during the crystal growth process, impurities or foreign objects in the furnace will be destroyed by high temperature. Cause crystals to be polluted, thereby affecting the quality of crystals; by cleaning up impurities in the furnace before pulling preparation, the possibility of impurity precipitation can be effectively reduced;

[0039] (2) Seed crystal fixation: fix the wedge-shaped columnar seed crystal on the crystal pulling rod with thin tungsten wire, and place it at the bottom of the heat exchanger; when the columnar seed crystal is installed, the wedge-shaped top is fixed by tungsten wire , the wedge-shape...

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Abstract

The invention relates to the technical field of sapphire processing, in particular to a method for preparing artificial sapphire with cold heart shouldering and lifting. Good genetic characteristics can ensure the quality of sapphire single crystal growth; through the cleaning process in the furnace, it can reduce the pollution during the crystal growth process, ensure the purity of the crystal, and reduce crystal defects; on the other hand, it is convenient to accurately control the cooling rate and reduce heat. At the same time, through the micro-lifting method of the lifting rod, it can reduce the disturbance of the temperature field and the probability of defects, thereby improving the quality of the crystal; on the other hand, during the cooling process, the crystal can be annealed in situ to reduce the occurrence of oxygen vacancies. defects, while simplifying procedures and saving energy, thereby further reducing the growth cost of sapphire crystals; the invention can also prevent crystal cracks and ensure crystal quality through reasonable control of the temperature in the furnace.

Description

technical field [0001] The invention relates to the technical field of sapphire processing, in particular to a method for preparing artificial sapphire by cold shoulder pulling. Background technique [0002] The English name of sapphire is Sapphire, which comes from the Latin Spphins, which means blue; it belongs to the corundum group of minerals and has a trigonal crystal system. In the gem world, all kinds of gem-quality corundum other than ruby ​​are called sapphires. Sapphires and rubies, emeralds, bodhi tourmalines, and tanzanites all belong to the genus of colored gemstones. [0003] Because corundum contains trace elements such as iron (Fe) and titanium (Ti), it presents blue, sky blue, light blue and other colors, among which bright sky blue is the best. The mineral name of sapphire is corundum, which belongs to the corundum group of minerals. In fact, gem-grade corundum in nature is called sapphire except for the red one called ruby, and other colors such as blue...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/20C30B15/20C30B33/02
CPCC30B29/20C30B15/20C30B33/02
Inventor 胡明理李业林杨博王春刚李伟国
Owner NINGXIA PROCRYSTAL TECH CO LTD
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