Hot melting-resistant structure for guide steel wire of silicon core furnace

Abstract

The invention discloses a hot melting-resistant structure for a guide steel wire of a silicon core furnace, which relates to the technical field of intraocular lens (IOL), wherein a ring (3) is arranged on the guide steel wire (7) between an observation window (2) in the wall of a silicon core furnace body (1) and a high-frequency coil (5); one part of the guide steel wire (7) between the observation window (2) and the high-frequency coil (5) is disconnected; and the upper end and the lower end of the ring (3) are respectively connected with two ends of the guide steel wire (7). According to the hot melting-resistant structure for the guide steel wire of the silicon core furnace, the ring is arranged on the guide steel wire between the observation window in the wall of the silicon core furnace body and the high-frequency coil, so that the contact probability of the upper end of a raw material rod and the high-frequency coil is greatly reduced, and the service life of the high-frequency coil is also prolonged effectively; and the hot melting-resistant structure keeps the guide steel wire away from the high-frequency coil with extremely high temperature, and effectively overcomes the disadvantage that the guide steel wire is easy to melt in the prior art.

Description

【Technical Field】 [0001] The invention relates to the technical field of artificial crystals, in particular to a heat-melting prevention structure of a silicon core furnace guide steel wire. 【Background technique】 [0002] At present, the amount of silicon core used in the country is very large; in the existing production process of silicon core, monocrystalline silicon and other material crystal zone melting methods, most of them use a monocular high-frequency coil, and its working principle is: During operation, the high-frequency current is supplied to the high-frequency coil, and the high-frequency coil generates current to inductively heat the raw material rod. The upper end of the heated raw material rod forms a melting zone, and then the crystal is inserted into the upper end of the raw material rod after passing through the drawing hole Then slowly raise the crystals, the raw material after melting will follow the crystals to rise, forming a new columnar crystal, this new...

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Problems solved by technology

[0002] At present, the amount of silicon cores used in China is very large; in the existing process of producing silicon cores, single crystal silicon and other material crystal zone melting methods, most of them use a monocular high-frequency coil, and its working principle is: When working, pass high-frequency current to the high-frequency coil, so that the high-frequency coil generates current to inductively heat the raw material rod, and the upper end of the heated raw material rod forms a melting zone, and then inserts the seed crystal into the upper end of the raw material rod through the drawing hole Then slowly lift the seed crystal, the molten raw material will rise with the seed crystal to form a new columnar crystal, and this new columnar crystal is the finished product of silicon core or other material crystals; In the aforementioned process, an observation window is provided at the corresponding high-frequency coil of the furnace body, and the workers need to observe all the time when drawing the cylindrical crystal. In the prior art, the Chinese patent CN101892519A discloses that the heat insulation effect of the ceramic sleeve is used to protect the guide wire , so that the guide steel wire is close to the high-frequency coil and will not be melted. However, while the ceramic sleeve protects the guide wire, it also affects the observation of the workers, which makes the high-frequency coil damaged by improper operation.

[0003] Since the high-frequency coil is a consumable product, the service life of the high-frequency coil is relatively short. The main reason is that the columnar crystal rising up with the seed crystal is easy to contact with the drawing hole of the high-frequency coil. The entire high-frequency coil is scrapped, and once the high-frequency coil is scrapped, it needs to be stopped for replacement

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