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Borosilicate glass with high transmittance at far ultraviolet band and preparation method thereof

A borosilicate glass, high transmittance technology, applied in the field of glass manufacturing, can solve problems such as difficulty in meeting the requirements of airtight sealing, poor chemical stability against water, mismatched expansion coefficients, etc., and achieve excellent chemical resistance against water. , The effect of improving transmittance and low production cost

Inactive Publication Date: 2015-05-06
CHINA BUILDING MATERIALS ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 2) The expansion coefficient fluctuates greatly, and the expansion coefficient does not match the high-temperature sealing of metals such as valveable alloys, making it difficult to meet the requirements of hermetic sealing
[0008] 3) The glass composition contains halides or P 2 o 5 , not friendly to the environment, poor chemical stability against water

Method used

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  • Borosilicate glass with high transmittance at far ultraviolet band and preparation method thereof
  • Borosilicate glass with high transmittance at far ultraviolet band and preparation method thereof
  • Borosilicate glass with high transmittance at far ultraviolet band and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Weighing step: weighing and mixing each raw material component according to the ratio set in Table 1 to form a mixture; wherein, the raw material of silica is prepared from quartz sand soaked in hydrochloric acid solution; specifically, Soak the quartz sand in hydrochloric acid solution for 4 hours, the iron content of the obtained quartz sand is less than 5ppm, then wash it with deionized water, and then transfer it to an oven at 120°C for 8 hours, which is the component used in this example. silica.

[0037] The raw material of the boron oxide is analytically pure H 3 BO 3 ; The raw material of alumina is analytically pure Al 2 o 3 ; The raw material of sodium oxide is analytically pure Na 2 CO 3 ; The raw material of potassium oxide is analytically pure K 2 CO 3 ; The raw material of lithium oxide is analytically pure Li 2 CO 3 .

[0038] During specific implementation, according to in table 1, the mass percentage composition of boron oxide, sodium oxide, a...

Embodiment 2

[0049] The procedure of Example 1 was repeated at the levels of components specified in Table 1 below. The test results are listed in Table 1.

Embodiment 3

[0051] The procedure of Example 1 was repeated at the levels of components specified in Table 1 below. The test results are listed in Table 1.

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Abstract

The invention relates to the field of glass manufacturing and particularly relates to borosilicate glass with high transmittance at a far ultraviolet band and a preparation method thereof. The borosilicate glass is composed of the following components in percentage by mass: 65-70% of silica, 20-25% of boron oxide, 1-5% of sodium oxide, 0.5-5% of alumina, 0.2-2% of potassium oxide and 0.2-2% of lithium oxide. The preparation method comprises the following steps: weighing materials: weighing the raw material components according to a set proportion and mixing to form a mixture; calcining: calcining the mixture; smelting: smelting the calcined mixture into molten glass under a high temperature condition; molding: carrying out casting molding on the molten glass to obtain a glass block, and annealing the glass block. The borosilicate glass has good chemical stability, small thermal expansion coefficient band, good matching property with a kovar alloy and high transmittance at the far ultraviolet band, the preparation method is simple, and the production cost is low.

Description

technical field [0001] The invention relates to the field of glass manufacturing, in particular to a borosilicate glass and a preparation method thereof. Background technique [0002] Ultraviolet light is the electromagnetic radiation spectrum from the purple end (wavelength of about 400nm) with shorter wavelength of visible light to X-ray (wavelength of 10nm). Most colorless optical glasses have high transmittance in the visible light band, but have varying degrees of absorption in the ultraviolet band. This is because under the irradiation of high-energy ultraviolet rays, the electrons inside the colorless optical glass are excited and transition at the energy level of about 3eV, thereby absorbing ultraviolet rays. [0003] Therefore, only a few glasses with special components have good UV transmission properties, such as quartz glass, B 2 o 3 Glass and P 2 o 5 The UV cut-off wavelengths of glass are 160nm, 170nm and 145nm respectively, all of which have high UV trans...

Claims

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Application Information

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IPC IPC(8): C03C3/091
CPCC03C3/091C03C4/0085
Inventor 何坤祖成奎王衍行韩滨陈江赵慧峰刘永华殷先印张瑞
Owner CHINA BUILDING MATERIALS ACAD
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