Conditioner for producing glass-ceramics and method for producing glass-ceramics

A technology of glass-ceramics and regulators, which is applied in glass manufacturing equipment, glass molding, manufacturing tools, etc., can solve the problems affecting the physical and chemical properties of glass-ceramics, weakening of sintering driving force, and weakening of fusion between particles, etc., to achieve Physical and chemical properties, eliminate interfacial stress, and promote the effect of the overall crystallization process

Active Publication Date: 2021-04-30
BEIJING MINING & METALLURGICAL TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the actual production of sintered glass-ceramics, in a semi-molten state, if it is necessary to discharge the gas inside the glass-ceramics and eliminate internal pores, it is necessary to increase the sintering temperature and prolong the sintering time. Under the continuous strengthening of the external temperature, Although the interior of the glass-ceramics is relatively dense, it also provides more energy for the grain boundaries of the basic glass particles, which weakens the driving force for sintering. During nucleation and crystallization, the fusion between particles is weakened. It is difficult to nucleate and crystallize, especially at the position where the internal gas is discharged, which will cause a large number of uncrystallized areas, and there will be a lot of glass phase stripes on the surface of the glass-ceramic sintered plate, and the appearance of these stripes will seriously affect the crystallite. Physical and chemical properties of glass, causing serious quality problems

Method used

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  • Conditioner for producing glass-ceramics and method for producing glass-ceramics
  • Conditioner for producing glass-ceramics and method for producing glass-ceramics
  • Conditioner for producing glass-ceramics and method for producing glass-ceramics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] The temperature of the glass melting furnace is 1450°C. The molten glass flows into the water quenching pool through the outlet of the melting furnace, and the water quenching glass pellets are taken out and transported to the storage yard. The material is sent to the molding workshop. The cloth state of the glass pellets is as follows figure 1 shown.

[0059] Use the high-temperature boron plate as the bottom of the forming mold, and the boron slats as the frame to form a cuboid mold. The width of the boron plate ribs used is 25mm. A layer of ceramic fiber paper is laid on the bottom and surrounding of the boron plate mold to make the mold flat and without inclination.

[0060] Weigh 100kg of glass pellets, 0.5kg of CaF 2 Powder, 0.8kg of TiO 2 powder, 0.48kg of ZnO powder and 0.22kg of BaO powder, first spread the glass pellets in the mold, control the thickness of the material layer to be 18-20mm, and then put the CaF 2 Powder, TiO 2 The powder, ZnO powder and B...

Embodiment 2

[0064] The temperature of the glass melting furnace is 1450°C. The molten glass flows into the water quenching pool through the outlet of the melting furnace, and the water quenching glass pellets are taken out and transported to the storage yard. The material is sent to the molding workshop.

[0065] Use the high-temperature boron plate as the bottom of the forming mold, and the boron slats as the frame to form a cuboid mold. The width of the boron plate ribs used is 25mm. A layer of ceramic fiber paper is laid on the bottom and surrounding of the boron plate mold to make the mold flat and without inclination.

[0066] Weigh 100kg of glass pellets, 0.5kg of CaF 2 Powder, 0.7kg of TiO 2 powder, 0.46kg of ZnO powder, 0.24kg of BaO powder, 0.06kg of Cr 2 o 3 powder and 0.04kg of Fe 2 o 3 Powder, first spread the glass pellets in the mold, control the thickness of the material layer to 18-20mm, and then put CaF 2 Powder, TiO 2 powder, ZnO powder, BaO powder, Cr 2 o 3 Pow...

Embodiment 3

[0068] The temperature of the glass melting furnace is 1450°C. The molten glass flows into the water quenching tank through the outlet of the melting furnace, and the water quenching glass pellets are taken out and transported to the storage yard. The material is sent to the molding workshop.

[0069] Use the high-temperature boron plate as the bottom of the forming mold, and the boron slats as the frame to form a cuboid mold. The width of the boron plate ribs used is 25mm. A layer of ceramic fiber paper is laid on the bottom and surrounding of the boron plate mold to make the mold flat and without inclination.

[0070] Weigh 100kg of glass pellets, 1.05kg of CaF 2 Powder, 0.66kg of TiO 2 powder, 0.54kg of ZnO powder, 0.30kg of BaO powder, 0.15kg of P 2 o 5 powder and 0.3kg of ZrO 2 Powder, first spread the glass pellets in the mold, control the thickness of the material layer to 18-20mm, and then put CaF 2 Powder, TiO 2 powder, ZnO powder, BaO powder, P 2 o 5 Powder a...

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Abstract

The invention provides a regulator for preparing glass-ceramics and a preparation method for glass-ceramics. Regulators for the preparation of glass-ceramics, including CaF 2 、TiO 2 , ZnO and BaO. The preparation method of the glass-ceramic comprises: setting a layer of regulator for preparing the glass-ceramic on the surface of the glass grain, and then sintering to obtain the glass-ceramic. The regulator for preparing glass-ceramics provided by the application can improve the interfacial bonding state between the particles of the basic glass granules in a semi-molten state, eliminate interfacial stress, become a preferential nucleation and crystallization center, and promote the overall analysis of glass-ceramics. In the crystallization process, the regulator, as a new nucleation precursor, can eliminate the glass phase on the surface of the sintered glass-ceramics. The preparation method of the glass-ceramic provided by the application can completely solve the product quality problem caused by the surface glass phase existing in the preparation of the glass-ceramic by the sintering method, and has great economic benefits.

Description

technical field [0001] The invention relates to the field of glass-ceramics, in particular to a regulator for preparing glass-ceramics and a preparation method for glass-ceramics. Background technique [0002] The preparation methods of glass-ceramics mainly include melting method, sintering method, sol-gel method, in addition to Petrurgic method, crack glass crystallization method and so on. The sintering method is one of the two most important preparation methods for the production of glass-ceramics. The sintering method refers to raising the temperature to a certain temperature, and the glass particles are in a semi-molten state. It is dense and recrystallized, and at the same time obtains excellent physical and chemical properties. [0003] The sintering between basic glass particles belongs to liquid phase sintering. The driving force of sintering is that the surface energy of the basic glass particles is greater than the grain boundary energy of the polycrystalline si...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C1/00C03C10/00C03B19/06
CPCC03B19/06C03C1/00C03C10/00
Inventor 赵庆朝李伟光杨航朱阳戈
Owner BEIJING MINING & METALLURGICAL TECH GRP CO LTD
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