Large-scale sapphire crystal growth furnace based on automatic control system

Abstract

The invention relates to the technical field of gemstone production, in particular to a large-size sapphire crystal growth furnace based on an automatic control system, which includes a furnace body and a barrel, the barrel is connected with an oxygen tube, and a beating mechanism is provided on the barrel, so A screen is provided inside the barrel, the bottom of the barrel communicates with the mixing chamber, the side wall of the mixing chamber communicates with a hydrogen pipe, the bottom of the mixing chamber communicates with the furnace body, and the bottom of the furnace body is provided with A descending mechanism, on which a crystallization rod is installed, the crystallization rod can extend into the furnace body, a first guide hole and a second guide hole are horizontally opened on the barrel, and the first guide hole is slidingly installed There is a first partition, and the invention improves the uniformity of the powder falling into the mixing chamber by partially separating the powder in the barrel, prevents the imbalance of the proportion of local main materials and auxiliary materials in the barrel, and makes the produced sapphire color Uniformity, small error, improve the overall aesthetics and production quality.

Description

technical field [0001] The invention relates to the technical field of gem production, in particular to a large-size sapphire crystal growth furnace based on an automatic control system. Background technique [0002] With the rapid development of science and technology, the market demand for sapphire crystal substrate materials will grow rapidly. At present, the growth technologies of sapphire crystal mainly include flame method, pulling method, guided mode method, heat exchange method, Kyropoulos method, temperature gradient method and descending method growth technology. The sapphire crystal produced by the flame fusion method has the characteristics of low cost, mature method and wide adaptability, so the produced sapphire is suitable for lighting, interior decoration and glass decoration. [0003] Existing flame fusion method for producing sapphire such as figure 1 As shown, the hammering mechanism 7 beats the material cylinder at a certain frequency to generate vibrat...

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Problems solved by technology

The raw material powder of sapphire is mainly alumina, supplemented by iron and titanium for coloring. Since the particle size of the auxiliary material and the main material is different, the auxiliary material with a smaller particle size will be damaged during the working process of the hammering mechanism 7. Move down along the gap of the main material with larger particle size, causing most of the auxiliary materials to gather at the bottom of the powder. There is a certain color difference between the final crystal and the powder crystal on the top, which affects the aesthetics when used as a decorative material

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