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A kind of glass and preparation method thereof

A technology of glass and glass raw materials, applied in the field of glass and its preparation, can solve the problems of glass warping, high production cost, impure components, etc., and achieve the effect of not being easy to warp

Active Publication Date: 2020-09-08
CSG HOLDING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to ensure that the tin liquid is not oxidized, the tin bath will always be filled with H 2 +N 2 Protective gas, but at the inlet and outlet of the tin bath, there is inevitably a space connected to the outside air, or the tin liquid in the tin bath is oxidized due to the impure composition of the protective gas, forming SnO or SnO 2 , at high temperature, the Sn in the tin liquid 2+ or Sn 4+ Ion exchange with the alkali metal ions in the glass network, so that the Sn 2+ or Sn 4+ Migrate into the lower surface of the glass to form a tin penetration layer
When ion exchange is performed on glass with a lot of tin penetration, due to the existence of the tin penetration layer, there is a large difference in the degree of ion exchange between the upper and lower surfaces of the glass, resulting in warping of the glass, which limits the application of the glass
[0003] Most of the existing technologies reduce the amount of tin infiltration on the lower surface of the glass during the float production process by changing the working parameters of the tin bath or from the perspective of protecting the tin liquid from oxidation. This method of reducing the amount of tin infiltration is complicated. , Difficult operation, high production cost
In the existing technology, there is also a way to reduce tin penetration by increasing the iron content, but the increase in iron content will greatly reduce the transmittance of the glass, which will greatly affect the use experience of the cover glass

Method used

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  • A kind of glass and preparation method thereof
  • A kind of glass and preparation method thereof
  • A kind of glass and preparation method thereof

Examples

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preparation example Construction

[0069] According to another aspect of the embodiments of the present invention, a method for preparing glass is provided, including:

[0070] The molten glass raw material is shaped and annealed to obtain the glass; wherein, the glass raw material is adjusted to be a raw material capable of any composition of the low tin permeable ultra-clear float glass of the present invention. The internal stress of the glass can be eliminated by annealing.

[0071] In the process of preparing glass, each component listed in the first aspect of the present invention can be used as raw materials. Those skilled in the art should understand that in the process of preparing glass, some physical and / or chemical changes may occur in the glass components, so that there is a certain difference between the raw material components and the composition of the final glass. Therefore, Those skilled in the art may also use other raw material components, as long as the raw material components can form the...

Embodiment 1-27

[0079] Weigh each raw material component of the glass, fully mix it in a mixer, put it into a platinum crucible, and put it into a silicon-molybdenum rod heating high-temperature furnace at 1650 ° C for 6 hours for clarification and homogenization. The homogenized molten glass is poured into the micro-float forming device, and the molten glass is drawn into a thin plate with a thickness of 1.5 mm to 2 mm by an edge pulling machine at 1100 ° C to 900 ° C, and the width of the plate is about 1000 mm. The formed glass plate Pull it into the annealing furnace, eliminate the internal stress and slowly cool to room temperature to obtain a thin plate-shaped low-permeability tin ultra-clear float glass with good surface smoothness and roughness. Measure the glass melting temperature, degradation temperature, transmittance and the amount of tin penetration on the lower surface of the glass.

[0080] The amount of tin infiltration is measured by XRF measurement (X-ray fluorescence spect...

Embodiment 21

[0101] Fe in Example 21 2 o 3 The content is 0.1%, SnO 2 The content is 0. On the one hand, too high Fe 2 o 3 The transmittance of the glass is reduced. On the other hand, Example 21 does not contain SnO, which can improve the quality of glass clarification. 2 , Therefore, the transmittance of the glass in Example 21 is significantly lower than that of the glass in Examples 1-20. In addition, it can also be seen from the measurement results of Examples 1-20 and Example 21 that the transmittance of the glass containing oxides of rare earth metals is higher. In addition, the glass of this embodiment has less warpage, for example, the warpage of the 5.5-inch cover plate is ≤0.15mm, the warpage of the 7-inch cover plate is ≤0.25mm, and the warpage of the 10-inch cover plate is ≤0.15mm. 0.4mm.

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Abstract

The invention discloses glass and a preparation method of same and relates to the technical field of glass. In one embodiment, the glass, on the basis of oxides, includes, by mass, 57-66% of SiO2, 12-20% of Al2O3, 3-8% of MgO, 10-16% of Na2O, 0.5-6.5% of K2O, 0.1-1.5% of ZrO2, and 0.001-0.01% of Fe2O3. The glass naturally has tin penetration resistance capability with other performances thereof are ensured. The glass can be subjected to ion exchange treatment directly and is not liable to warp after the ion exchange treatment.

Description

technical field [0001] The invention relates to the technical field of glass, in particular to a glass and a preparation method thereof. Background technique [0002] The forming of float glass is carried out on the surface of molten tin, and the environment in the tin bath is relatively complicated, and there is a three-phase system of glass liquid-tin liquid-tin bath protective gas. During the production process of float glass, the glass is formed, polished and cooled on the surface of molten tin. Theoretically, the wetting angle between pure molten tin liquid and glass at a temperature of about 1000°C is 175°, basically no wetting. In order to ensure that the tin liquid is not oxidized, the tin bath will always be filled with H 2 +N 2 Protective gas, but at the inlet and outlet of the tin bath, there is inevitably a space connected to the outside air, or the tin liquid in the tin bath is oxidized due to the impure composition of the protective gas, forming SnO or SnO ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C3/095C03C3/085
CPCC03C3/085C03C3/095
Inventor 肖子凡何浩波刘攀邓臻禄戴斌
Owner CSG HOLDING