Method for controlling kyropoulos sapphire molten crystal vaccination state based on random distribution

A technology of random distribution and control method, applied in chemical instruments and methods, seed crystals are retained in the melt during growth, single crystal growth, etc., which can solve energy waste, inoculation difficulties, accurate judgment and control of inoculation timing, etc. question
CN109487334AInactive Publication Date: 2019-03-19TAIYUAN UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
TAIYUAN UNIV OF TECH
Publication Date
2019-03-19
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention belongs to the field of sapphire preparation, and provides a method for controlling the kyropoulos sapphire molten crystal vaccination state based on random distribution. The method comprises the following steps: determining and controlling the sapphire molten crystal vaccination state by utilizing random distribution control; acquiring and processing the sapphire molten crystal surface image, establishing a model which takes the primary function approximate weight corresponding to the molten crystal surface image corrugated information distribution, input voltage change ratio, voltage tuning ratio, cooling water hydraulic pressure and cooling water temperature of a power supply cabinet as input; predicting errors by the model to constantly correct the input information; andtracking the molten crystal surface image corrugated information distribution when vaccination is expected regularly to control the sapphire molten crystal vaccination state. According to the method,after a crystal furnace is heated, the molten crystal in a proper vaccination state is determined and kept by utilizing the molten crystal image distribution information, the vaccination time determined by artificial observation and experience is not required, so that labor resource is reduced, and the vaccination success rate is improved. The method is applicable to large-scale production of sapphire crystal.
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Description

technical field

[0001] The invention belongs to the field of sapphire (alumina single crystal) preparation, and in particular relates to a random distribution-based method for controlling the inoculum state of sapphire melted crystals in the Kyropoulos method. Background technique

[0002] Sapphire crystal is an alumina single crystal with excellent comprehensive properties. The sapphire crystal material is extremely strong, has strong wear resistance, and also has excellent optical properties. Since the 20th century, sapphire crystals have played an increasingly important role in engineering applications. In terms of specific applications of sapphire, according to the statistics of Qianzhan Industry Research Institute, LED consumed 77.23% of the world's sapphire production capacity in 2015, followed by mobile phone glass, camera lenses, watches, etc. According to the "2018-2024 China Sapphire Market Special Research and Investment Prospect Analysis Report", sapphire occup...

Claims

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