A sapphire furnace intermittent temperature measuring device

Abstract

The invention relates to the field of a crystal growth furnace, and aims at providing a sapphire furnace discontinuous temperature testing device, which comprises an infrared temperature tester, an upper plate, a lower plate, a light shielding plate, a rotary shaft, a rotary sealing structure, a swinging air cylinder and observing glass, wherein the upper plate and the lower plate are connected to form a sealed cavity, the light shielding plate is arranged in the sealed cavity, one end of the rotary shaft is connected with the input shaft of the swinging air cylinder, the other end of the rotary shaft sequentially penetrates through the rotary sealing structure and the lower plate and is connected with the light shielding plate, the observing glass is arranged on an observing port under the lower plate, and the infrared temperature tester is arranged under the observing glass. In the drawing process of the sapphire furnace crystal, an operator can monitor the temperature in the furnace through the device to judge the crystal growth condition, then a reliable value basis is provided for the subsequent crystal seeding and crystal growth, and the device together with the control system can form a temperature-power closed loop, so the automatic crystal seeding detection and the crystal growth of the sapphire furnace are realized.

Description

technical field [0001] The invention relates to the field of crystal growth furnaces, in particular to a sapphire furnace intermittent temperature measuring device. Background technique [0002] Due to the good optical performance and stable chemical performance of sapphire, sapphire has become the best choice for making LED substrate materials. However, the sapphire crystal needs to be drawn in a closed furnace through a series of operations of seeding-shouldering-equal diameter-finishing. The entire crystal pulling process needs to adjust the temperature change to affect the growth rate and state of the crystal. [0003] The usual sapphire furnace generally requires manual operation for these processes, and there is no specific value provided by specific instruments and equipment for reference. The crystal pulling process is adjusted entirely based on the actual observation of the crystal growth by the operator. Moreover, since the observation glass of the sapphire furnac...

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Problems solved by technology

Moreover, since the observation glass of the sapphire furnace cannot clearly observe the growth inside the furnace body 12 hours after reaching the highest temperature in the furnace, the practical experience and technical requirements of the operators are particularly strict, and it is of great importance for mass production operations. limitation

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