Wide-spectrum high-absorption-rate black glass and preparation method and application thereof

Abstract

The invention relates to wide-spectrum high-absorption-rate black glass and a preparation method and application thereof. The wide-spectrum high-absorption-rate black glass is prepared from the following raw materials in parts by weight: 40 to 60 parts of iron tailings, 5 to 15 parts of silicon dioxide, 2 to 5 parts of sodium carbonate, 5 to 10 parts of magnesium oxide, 10 to 20 parts of aluminum hydroxide, 0.5 to 1 part of sodium hexametaphosphate, 1 to 2 parts of potassium carbonate, 10 to 20 parts of calcium carbonate and 2 to 3 parts of titanium dioxide. The preparation steps include material proportioning, material mixing, high-temperature fusion, forming and annealing. Test results prove that the prepared black glass has the advantages that the folding resistance strength is great, and reaches 100 to 140 Mpa; a high light absorption rate is realized in the wide spectrum range of 250 nm to 2500 nm, and reaches 90 percent or higher; the black glass can be applied to the preparation of solar energy heat absorption materials, building heat insulation energy-saving materials and the like.

Description

technical field [0001] The invention belongs to the field of glass materials, and relates to a wide-spectrum high-absorption black glass and a preparation method and application thereof. Background technique [0002] Wide-spectrum high-absorption black glass can be used in solar energy, construction, decoration and other industries. It has a high absorption rate in the infrared band and can store and utilize solar heat. Therefore, it is of great significance to develop pure black glass with high absorption coefficient, stable performance, simple process, low cost, and integration of structural materials and heat-absorbing materials. [0003] Some existing black glass production technologies, such as the invention patent application with publication number CN101054263A, use relatively high cost raw materials such as borosilicate glass and colorant cobalt ions, chromium ions and copper ions; the invention patent with publication number CN101857367 application, the black glass...

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Problems solved by technology

[0003] Some existing black glass production technologies, such as the invention patent application with publication number CN101054263A, use relatively high cost raw materials such as borosilicate glass and colorant cobalt ions, chromium ions and copper ions; the invention patent with publication number CN101857367 application, the black glass mentioned is added with relatively expensive cobalt oxide and chromium oxide coloring agents, and the process is cumbersome, and heat treatment is required to crystallize and nucleate. Even if the glass-ceramic prepared in this way has the highest flexural strength, it can only reach 138Mpa , and the patent does not explain the light absorption rate of the glass, and the light absorption is only shown as the absorption of visible light

[0004] In addition, iron tailings are waste after mineral processing. Iron tailings not only pollute the environment, endanger people's lives and property safety, but also occupy a large amount of land and waste resources.

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