A kind of lead-free ultraviolet-transmitting glass and preparation method thereof

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...

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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

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