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High-borosilicate glass, and preparation method and application thereof

A high borosilicate glass and glass liquid technology, applied in the field of glass manufacturing, can solve the problems of inappropriate small batches, high optical quality high borosilicate glass, etc., and achieve the effects of improving melting quality, high optical uniformity and simple operation

Active Publication Date: 2014-03-12
CHINA BUILDING MATERIALS ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these continuous preparation methods are not suitable for the preparation of small batches of high optical quality borosilicate glass

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Weigh high borosilicate glass raw materials according to the following weight: (Kg)

[0022] SiO 2 68.B 2 o 3 19.5, Al 2 o 3 3. Na 2 O4.5, K 2 O5, ZnO0.6 and Sb 2 o 3 0.2. Preparation of borosilicate glass:

[0023] Mix the above-mentioned raw materials evenly, and melt them at 1450°C in a Pt crucible. After the raw materials are completely melted, raise the melting temperature to 1560°C to obtain a low-viscosity molten glass. Pass high-purity O2 into the bottom of the glass liquid for bubbling, and the bubbling time is 20 minutes. After standing still for 2 hours, the molten glass was mechanically stirred with a frame-type Pt stirrer at a speed of 50 rpm for 3 hours. After the temperature is lowered, it is formed by leaking material. After the glass is shaped, it is moved into a muffle furnace that has been heated to 550°C in advance for annealing. High borosilicate glass is obtained after physical polishing.

Embodiment 2

[0025] Weigh high borosilicate glass raw materials according to the following weight: (Kg)

[0026] SiO 2 68.B 2 o 3 19.5, Al 2 o 3 3. Na 2 O4.5, K 2 O5, ZnO0.6 and Sb 2 o 3 0.2. Preparation of borosilicate glass:

[0027] Mix the above-mentioned raw materials evenly, and melt them at 1480°C in a Pt crucible. After the raw materials are completely melted, raise the melting temperature to 1580°C to obtain a low-viscosity molten glass. The bottom of the glass liquid is passed into high-purity O 2 Carry out bubbling, the bubbling time is 10min. After standing still for 1.5 h, the molten glass was mechanically stirred with a frame-type Pt stirrer at a speed of 80 rpm for 2 h. After the temperature is lowered, it is formed by leaking material. After the glass is shaped, it is moved into a muffle furnace that has been heated to 550°C in advance for annealing. High borosilicate glass is obtained after physical polishing.

Embodiment 3

[0029] Weigh high borosilicate glass raw materials according to the following weight: (Kg)

[0030] SiO 2 64.8, B 2 o 3 25. Al 2 o 3 3. Na 2 O2.5, K 2 O4, ZnO0.5 and Sb 2 o 3 0.2. Preparation of borosilicate glass:

[0031] Mix the above-mentioned raw materials evenly, and melt them at 1400°C in a Pt crucible. After the raw materials are completely melted, raise the melting temperature to 1550°C to obtain molten glass with a lower viscosity. The bottom of the glass liquid is passed into high-purity O 2 Carry out bubbling, and the bubbling time is 60min. After standing still for 2 hours, the molten glass was mechanically stirred with a frame-type Pt stirrer at a speed of 100 rpm for 3 hours. After the temperature is lowered, it is formed by leaking material. After the glass is shaped, it is moved into a muffle furnace that has been heated to 500°C for annealing. High borosilicate glass is obtained after physical polishing.

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Abstract

The invention relates to a high-borosilicate glass, and a preparation method and application thereof, belonging to the field of glass making. The preparation method comprises the following steps: weighing high-borosilicate glass raw materials, and uniformly mixing the raw materials; melting the uniformly mixed raw materials into a glass liquid with a platinum crucible, and introducing oxygen gas or liquid oxygen to the bottom of the glass liquid with a platinum tube at the flow rate of 0.5-3 L / minute for 10-60 minutes; and standing for 1-2 hours, stirring the glass liquid with a frame platinum stirrer at the rotation speed of 20-100 rpm for 2-5 hours, cooling, forming, annealing and physically polishing to obtain the high-borosilicate glass. The high-borosilicate glass provided by the invention has higher optical uniformity and no visible bubble, stripe or flash point; the preparation method obviously enhances the melting quality of the high-borosilicate glass and widens the application range of the high-borosilicate glass; and the high-borosilicate glass is especially suitable to be used as a window material in the field of manufacturing of photoelectric detectors, vacuum instruments, integrated circuits and the like.

Description

technical field [0001] The invention relates to a method for preparing high borosilicate glass, high borosilicate glass and applications thereof, and belongs to the field of glass manufacturing, in particular to a method for preparing high borosilicate glass suitable for small batch production and the glass prepared by the method . Background technique [0002] High borosilicate glass refers to B 2 o 3 Silicate system glass with a content exceeding 10% by weight. This type of glass has the characteristics of excellent visible light transmittance (≥90%), low expansion coefficient, good chemical stability and heat resistance, and is widely used in aviation, instruments, lighting, fire prevention and tableware and other fields. [0003] SiO in borosilicate glass 2 and B 2 o 3 The content is relatively high, reaching 65-85% and 15-25% respectively, the content of alkali metal is low, about 6-11%, and it contains 2-6% Al 2 o 3 To ensure that the glass has good physical an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/091
Inventor 王衍行祖成奎何坤韩滨
Owner CHINA BUILDING MATERIALS ACAD
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