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Lead-free uviol glass and preparation method thereof

A technology of ultraviolet light and glass, which is applied in the field of lead-free ultraviolet transparent glass and its preparation, can solve the problems of low transmittance, failure to meet the use requirements, and high requirements for visible light transmittance, and achieve low melting point, high yield, The effect of simple preparation process

Active Publication Date: 2017-05-24
上海罗金光电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the commonly used UV-transmitting glass is mainly quartz glass. This glass can not only pass through long-wave ultraviolet rays, but also pass through visible light, which does not meet its use requirements.
[0004] In 2002, the patent application No. 02137047.8 stated that the 3650nm ultraviolet rays were transmitted, and the transmittance was low, and there was no expression for visible light, while the black ultraviolet-transmitting quartz tube with the patent application No. 200910232270.4 had a transmittance of only 63%. , the product with patent application No. 200810225058.0 is mainly used for displays, which require high transmittance of visible light

Method used

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  • Lead-free uviol glass and preparation method thereof
  • Lead-free uviol glass and preparation method thereof
  • Lead-free uviol glass and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] formula:

[0032]

[0033] The glass batch prepared according to the above formula was melted at 1480°C for 10 hours in an electric-assisted melting furnace or an all-electric furnace, and a lead-free UV-transparent glass tube was prepared by using the horizontal tube drawing technology. The glass tube has 365nm UV-transmission The rate reaches 82.1%, the visible light transmittance is lower than 0.8%, and the lead content is lower than 450ppm. The expansion coefficient of the glass tube is 91*10 -6 / °C, the softening point temperature is 635°C.

Embodiment 2

[0035] formula:

[0036]

[0037] The glass batch prepared according to the above formula was melted at 1440°C for 6 hours by using an electric-assisted melting furnace or an all-electric melting furnace, and a lead-free UV-transparent glass tube was prepared by using a vertical tube drawing technology. The glass The tube has a 365nm ultraviolet transmittance of 80.2%, a visible light transmittance of less than 1%, and a lead content of less than 500ppm. The expansion coefficient of the glass tube is 98*10 -6 / °C, the softening point temperature is 610°C.

Embodiment 3

[0039] formula:

[0040]

[0041] The glass batch prepared according to the above formula was melted at 1460°C for 6 hours by using an electric-assisted melting furnace or an all-electric melting furnace, and a lead-free UV-transparent glass tube was prepared by using a vertical tube drawing technology. The glass The tube has a 365nm ultraviolet transmittance of 85.0%, a visible light transmittance of less than 0.8%, and a lead content of less than 400ppm. The expansion coefficient of the glass tube is 95*10 -6 / °C, the softening point temperature is 618°C.

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Abstract

The invention relates to lead-free uviol glass and a preparation method thereof. The lead-free uviol glass is prepared from the following raw material components in percentage by mass: 65 to 71% of SiO2, 0 to 3% of Al2O3, 5 to 10% of Na2O, 0 to 5% of K2O, 0 to 3% of Li2O, 7 to 20% of alkaline earth metal oxide, 0 to 3% of B2O3, 0.1 to 3% of NiO, 0.1 to 1% of CoO and 0.1 to 0.2% of Fe2O3. The preparation method comprises the following steps of mixing the raw materials; melting for 6 to 10h at the temperature of 1400 to 1480 DEG C, and utilizing a vertical or horizontal tube drawing method, so as to obtain the lead-free uviol glass. The lead-free uviol glass has the advantages that ultraviolet-a with wavelength of 320 to 400nm can penetrate through the lead-free uviol glass, and the penetration of visible light can be cut off; compared with the conventional uviol glass, the penetration rate of ultraviolet rays is high, and the lead content is low; the preparation technology is simple, the finished rate is high, the chemical stability is good, the service life is long, and the like.

Description

technical field [0001] The invention belongs to the field of ultraviolet-transmitting glass and its preparation, and in particular relates to a lead-free ultraviolet-transmitting glass and a preparation method thereof. Background technique [0002] Under normal circumstances, ultraviolet rays are harmful to the human body. But in certain situations, it can be very useful. For example, the long-wave ultraviolet light with a wavelength of 365nm conforms to the phototaxis response curve of insects, so when making insect trap lamps, glass with a high transmittance of this wavelength needs to be used as the lamp tube. Ultraviolet light is needed in ore identification, stage decoration, currency inspection and other places. It can be seen that these occasions not only need to pass through ultraviolet light, but also need to completely cut off visible light, so that insects will not be affected by visible light when making insect trap lamps, and it will not affect human observati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/091C03C4/00
CPCC03C3/091C03C4/0085
Inventor 林加喜汪庆卫童荔霞宁伟
Owner 上海罗金光电科技有限公司
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