Size-adjustable combined crucible thermal field

Abstract

The invention discloses a size-adjustable combined type crucible thermal field, and belongs to the technical field of smelting equipment; aiming at the fact that an existing crucible cannot adapt to the change of the size of a seed crystal, and the thermal field cannot be adjusted, the thermal field is provided. The crucible thermal field comprises a crucible upper cover, a combined crucible cylinder, a side supporting assembly and a crucible bottom, wherein the combined crucible cylinder is a cylinder body with openings at two ends; the bottom of the combined crucible cylinder is arranged onthe crucible bottom; the crucible upper cover covers a top opening of the combined crucible cylinder; a closed cavity is formed in the combined type crucible cylinder after mounting, the side supporting assembly is mounted on the inner wall of the combined type crucible cylinder through threads, the height of the side supporting assembly located on the inner wall of the combined type crucible cylinder is adjustable, a center through hole is formed in the center of the side supporting assembly, and a seed crystal is mounted at the center through hole. The crucible is of a modular structure andcan be combined and adjusted according to actual needs, single crystal growth of seed crystals of different sizes is achieved, the height of the crucible is adjustable, and thermal fields with different length-diameter ratios can be achieved.

Description

Technical field: [0001] The invention belongs to the technical field of smelting equipment, and in particular relates to a size-adjustable combined crucible heat field. Background technique: [0002] The physical vapor transport PVT method is currently one of the most effective methods for growing Sic crystals. When using the PVT method to prepare silicon carbide SiC or aluminum nitride AlN single crystals, the crucible made of high-temperature resistant materials provides a relatively good environment for the reaction and deposition of gas phase components. confined space. During the crystal growth process, the crucible often needs to be heated above 2000°C for more than 100 hours, which may cause a certain loss to the crucible, and the high-purity crucible material is expensive and usually needs to be imported, and the crucible is formed at one time. Its size cannot be adjusted, which leads to the fixed crystal growth thermal field. Therefore, generally, a crucible of one...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the shortcomings of the existing crucible with a single size and the thermal field cannot be adjusted, the present invention provides a size-adjustable combined crucible thermal field. By designing the crucible as a detachable modular structure, different heights can be obtained by combination crucible, so as to meet the needs of single crystal growth of seeds of different sizes

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