Glass-ceramic crystallization device and method

Abstract

The invention belongs to the technical field of glass crystallization and particularly discloses a glass-ceramic crystallization device capable of reducing glass breaking probability in a crystallization process and a glass-ceramic crystallization method adopting the glass-ceramic crystallization device to crystallize glass. The glass-ceramic crystallization device comprises a crystallization furnace and a crystallization bracket arranged in the crystallization furnace, wherein the crystallization bracket comprises a support plate; a placing groove is formed in the support plate, an anti-breaking cushion layer is arranged in the placing groove, and the ratio of the thickness of the anti-breaking cushion layer to the depth of the placing groove is 1:1-2. By arranging the anti-breaking cushion layer in the placing groove and enabling the ratio of the thickness of the anti-breaking cushion layer to the depth of the placing groove to be 1:1-2, the glass can be placed on the anti-breaking cushion layer for crystallization, glass breaking caused by larger rigid stress produced between the glass and the support plate due to volume shrinkage of the glass can be avoided, and the glass breaking probability in a crystallization process is reduced.

Description

technical field [0001] The invention belongs to the technical field of glass crystallization, and in particular relates to a glass-ceramic crystallization device and method. Background technique [0002] At present, glass-ceramic is crystallized by the traditional two-stage crystallization process, that is, heat preservation at the nucleation temperature obtained from the DSC curve, heat preservation at the crystallization temperature obtained from the DSC curve, and finally precision annealing to room temperature. This is no problem when producing small-sized glass-ceramics. However, when producing large-scale glass-ceramics, this process will cause the glass to break due to too much crystallization heat storage; especially for large-diameter zero-expansion glass-ceramics with a diameter of φ500mm or more and a thickness of 70mm or more. In other words, crystallization using traditional techniques in the production process often leads to crystallization bursting. Content...

AI Technical Summary

Problems solved by technology

However, when producing large-sized glass-ceramics, this process will cause the glass to break due to too much crystallization heat storage; especially for large-diameter zero-expansion glass-ceramics with a diameter of 500mm or more and a thickness of 70mm or more. In other words, crystallization using traditional techniques in the production process often leads to crystallization bursting

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