Glass with high transmissivity of ultraviolet A and preparation method for same

Abstract

The invention relates to glass with high transmissivity of ultraviolet A and a preparation method for the same. The constituents of the glass comprise, by mass fraction, 62-68% of SiO2, 2-4% of Al2O3, 6-12% of Na2O, 2-6% of K2O, 5-10% of alkaline-earth metal oxide, 7-11% of PbO, 0.1-3% of NiO, 0.1-1% of CoO and 0.1-0.2% of FeO3. The preparation method comprises the following steps of: by mass fraction, preparing glass batch according to the ratios; melting for 6-10 hours at 1400-1480 DEG C; and preparing the glass with high transmissivity of ultraviolet A by vertical or horizontal tube-drawing process. The glass disclosed by the invention can transmit ultraviolet A with a wavelength of 320-400 nm and stop the transmission of visible light; and compared with conventional ultraviolet-transmitting quartz glass, the glass disclosed by the invention is low in melting point, simple in preparation process and high in yield.

Description

Technical field [0001] The invention belongs to the field of ultraviolet transparent glass and its preparation, and particularly relates to a high-transmitting long-wave ultraviolet glass and a preparation method thereof. Background technique [0002] Glass is characterized by crystal clearness, so it has a very good transmittance for visible light with a wavelength of 400nm to 700nm. It has a very good blocking effect on ultraviolet rays with a wavelength of 100nm ~ 400nm. The main reason is that glass contains metal elements such as iron, which have a better absorption effect on ultraviolet rays. Therefore, ordinary glass cannot transmit ultraviolet rays, including long-wave ultraviolet rays with a wavelength of 320nm to 400nm. [0003] Normal ultraviolet rays are harmful to the human body. But under certain circumstances, it has a very good effect. For example, the long-wave ultraviolet light with a wavelength of 365nm conforms to the phototaxis response curve of insects. Th...

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Problems solved by technology

[0004] 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.

[0005] 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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