Melting equipment and melting method for growing quartz crucible by thermal spraying

Abstract

The invention provides melting equipment and a melting method for growing a quartz crucible by thermal spraying. Firstly, a set of melting equipment for the quartz crucible and comprises a control main machine; the control main machine is directly connected with a feeding system and a plurality of thermal spraying molding devices at the lower positions are connected with a lateral side of the feeding system; the control main machine is further connected with an inductance heater and relative auxiliary equipment; a crucible melting method based on the equipment utilizes a thermal spraying growing method to melt the crucible; after a crucible mold is cooled, a baiting device keeps the baiting stability; melting parameters are controlled by the control main machine and three times of thermal spraying molding are carried out by utilizing baiting pipes of the thermal spraying devices to prepare a finished product crucible. The crucible prepared by the invention can be effectively adapted to some requirements of characteristics of long use time, high temperature and high required purity on the quartz.

Description

technical field [0001] The invention relates to a melting technology of a crucible, in particular to a melting equipment and a melting method of a thermal spraying growth quartz crucible. Background technique [0002] As a renewable clean energy, solar energy has been widely used in grid-connected power generation, civil Power generation, public facilities and integrated energy-saving buildings. In the field of solar power generation, crystalline silicon photovoltaic power generation systems occupy a major position in the new energy photovoltaic power generation market. As the main link of photovoltaic power generation—monocrystalline silicon wafers, the market has increasingly stringent requirements on the quality of monocrystalline silicon, and the progress of its production technology is An important link in the promotion and application of the photovoltaic power generation industry. In this production link, the quartz crucible belongs to the upstream product in the indu...

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Problems solved by technology

[0003] However, in the quartz crucible melted by the ordinary method, the gas cannot be completely discharged during melting, and there are many bubbles in the crucible wall. When the temperature is high when pulling a single crystal, the bubbles will expand and burst, causing bubbles and impurities to mix into the pulling process. In the single crystal ingot made by the system, the oxygen content of the single crystal is high, the density difference is affected, the purity is affected, the service life of the single wafer is not long, the conversion rate is not up to standard, and the crucible is not strong enough, and it is easy to deform during the drawing process.

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