Glass ceramic crystallization method and device

A technology of glass-ceramics and crystallization, which is applied in glass forming, glass rolling, glass furnace equipment, etc., can solve the problems of high damage rate of thin plate processing, deformation of plate surface, and limitation of thin plate production, etc., to achieve uniform heating Effects of radiation, improved crack resistance, and enhanced toughness

Active Publication Date: 2019-07-19
江西鼎盛新材料科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for thinner plates such as 3--6MM microcrystalline plates, the traditional process cannot solve the problem of large surface deformation, especially when producing thin plates in a roller kiln, because there are gaps between the sticks, and the crystallization must Carrying out at high temperature, due to the softening of the plate, will inevitably lead to deformation of the plate surface, and the damage rate of the thin plate processing is high, so the crystallization of the thin plate has become a technical problem, and it also restricts and limits the production of the thin plate

Method used

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  • Glass ceramic crystallization method and device

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Experimental program
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Effect test

Embodiment 1

[0030] Such as figure 1 A crystallization method of glass-ceramics shown, which includes the following steps: Melting: heating the uniformly stirred batch material to 460°C at high temperature, keeping it for 1 hour, then heating to 920°C, keeping it for 1 hour, and finally raising the temperature Melt at 1540°C and keep for 2 hours to obtain molten glass-ceramic liquid. Using a three-step heating method, the temperature rises uniformly, and the heat radiation to the batch material is thorough, which well avoids the appearance of solid impurities in the liquid, and can be obtained Uniform and delicate molten glass greatly improves the quality of the finished glass plate; Calendering: Cool the above glass-ceramic liquid to 1160°C, then send it to the calender for three calendering, and perform one calendering at a temperature of 960°C , second calendering at 860°C, third calendering at 760°C, the glass-ceramic is pressed to a thickness of 4mm, and the three-step calendering met...

Embodiment 2

[0032] Such as figure 1A crystallization method of glass-ceramics shown, which includes the following steps: Melting: heating the uniformly stirred batch material to 480°C at high temperature, keeping it for 1.5 hours, then heating to 950°C, keeping it for 2 hours, and finally raising the temperature Melt at 1590°C and keep for 2 hours to obtain molten glass-ceramic liquid. Using a three-step heating method, the temperature rises evenly, and the heat radiation to the batch material is thorough, which well avoids the appearance of solid impurities in the liquid, and can be obtained Uniform and delicate molten glass will greatly improve the quality of the finished glass plate; Calendering: Cool the above-mentioned glass-ceramic liquid to 1180°C, then send it to the calender for three calendering, and perform one calendering at a temperature of 980°C , second calendering at a temperature of 870°C, and third calendering at a temperature of 770°C. The glass-ceramic is pressed to a ...

Embodiment 3

[0034] Such as figure 1 A crystallization method of glass-ceramics shown, which includes the following steps: Melting: heating the uniformly stirred batch material to 520°C at high temperature, keeping it for 2 hours, then heating to 960°C, keeping it for 1.5 hours, and finally raising the temperature Melt at 1610°C and keep for 3 hours to obtain molten glass-ceramics. Using a three-step heating method, the temperature rises uniformly, and the heat radiation to the batch material is thorough, which well avoids the appearance of solid impurities in the liquid and can be obtained. Uniform and delicate molten glass will greatly improve the quality of the finished glass plate; Calendering: Cool the above glass-ceramic liquid to 1190°C, then send it to the calender for three calendering molding, and perform one calendering at 1040°C , second calendering at 900°C, third calendering at 880°C, the glass-ceramic is pressed to a thickness of 6 mm, and the three-step calendering method m...

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Abstract

The invention discloses a glass ceramic crystallization method and device. The crystallization method comprises melting, calendaring molding, roller-bed coring, tin-pond crystallizing, roller-bed annealing, cutting and batching out, wherein the crystallization device comprises a tin pond brick through beam, a tin pond top cover brick, a heating element, a lifting device, a tin pond, a front transition roller bed and a rear transition roller bed, one end of the lifting device is fixedly mounted at the bottom of a cross beam, the other end of the lifting device is connected with the tin pond topcover brick, the heating element is connected with the bottom of the tin pond top cover brick, a crystallization tin pond is arranged at the lower part of the heating element and comprises a tin pondbottom brick, a tin pond wall brick and a tin pond breast wall, and the front transition roller bed and the rear transition roller bed are respectively arranged on the two sides of the tin pond. Thethree-step heating melting method and the three-step calendaring molding method greatly improve the transparency, the toughness, the compressive strength and the crack resistance of a glass sheet; theroller-bed coring is adopted, then the high-temperature conveying of the glass sheet is facilitated, and the roller-bed coring is favorable for the even heating of the glass sheet; and the tin-pond crystallizing improves the flatness of the surface of the glass ceramic glass sheet.

Description

technical field [0001] The invention belongs to the technical field of glass-ceramics production, and in particular relates to a crystallization method and a device for glass-ceramics. Background technique [0002] At present, the crystallization of glass-ceramics generally uses shuttle kilns, tunnel kilns or roller kilns for nucleation, crystallization and annealing. During the crystallization process, the deformation of the plate is small, which can meet the strength requirements of the plate, and the thick plate is suitable for surface processing, and the damage is small. In addition, it can meet the needs of production. However, for thinner plates such as 3--6MM microcrystalline plates, the traditional process cannot solve the problem of large surface deformation, especially when producing thin plates in a roller kiln, because there are gaps between the sticks, and the crystallization must Under high temperature, due to the softening of the plate, it will inevitably le...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B32/02C03B13/00C03B5/16
CPCC03B5/16C03B13/00C03B32/02
Inventor 张强金孙波王昆
Owner 江西鼎盛新材料科技有限公司
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