Black glass capable of highly absorbing earth surface sunlight and preparation method thereof

Abstract

The invention discloses a black glass for highly absorbing earth surface sunshine and preparation method thereof. The black glass is prepared with borosilicate glass and colouring agent, the colouring agent comprises cobalt oxide or cobaltous oxide, chrome oxide and copper oxide, in every 100 moles borosilicate glass, cobalt ions are 0.1-3 moles, chromium ions are 0.1-3 moles, copper ions are 0.5-4 moles. First, mixing borosilicate glass with the colouring agent uniformly in proportion, melting at 1300-1500 DEG C 1-6 hours; molding in moulds then processing annealing treatment in a annealing furnace at 450-600 DEG C 1-3 hours, then natural cooling to room temperature. The invention produces black glass compound colored by cobalt, chromium and copper ions, the black glass has good absorbing effect of sunshine of the entire sunshine wave band range (200nm-2500nm) reaching on earths surface.

Description

technical field [0001] The invention belongs to the glass production technology, and in particular relates to a black glass with high absorption of surface sunlight and a preparation method thereof. Background technique [0002] At present, there are many ways to make black glass, and the specific manufacturing process and materials used are very different. However, the black glass produced at present is only black in color, that is to say, it is only opaque to the visible band. Yes, while the wavelength of sunlight reaching the surface of the earth extends from 200nm to 2500nm, and the wavelength of the visible band is only in the range of 400nm-780nm. Surface sunlight also has a certain energy distribution in the ultraviolet and infrared bands outside the visible light , for these two bands, traditional black glass cannot guarantee its impermeability. For example, the patent application No. 03153789.8 "A Production Method for Crystal Black Glass" mentions the use of Fe 2...

AI Technical Summary

Problems solved by technology

[0002] At present, there are many ways to make black glass, and the specific manufacturing process and materials used are very different. However, the black glass produced at present is only black in color, that is to say, it is only opaque to the visible band. Yes, while the wavelength of sunlight reaching the surface of the earth extends from 200nm to 2500nm, and the wavelength of the visible band is only in the range of 400nm-780nm. Surface sunlight also has a certain energy distribution in the ultraviolet and infrared bands outside the visible light , for these two bands, traditional black glass cannot guarantee its impermeability

For example, the patent application No. 03153789.8 "A Production Method for Crystal Black Glass" mentions the use of Fe 2 o 3 , CoO, and NiO can be used as colorants to produce black glass in conventional glass systems, but the black he said is only for visible light