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Method for preparing calcium aluminosilicate nanometer microcrystal glass by utilizing natrium silica calcium glass waste slag

A glass-ceramic and nano-silicon technology, which is applied in the field of preparing calcium-aluminum-silicon nano-ceramic glass by using nano-silica-calcium glass waste residues, can solve the problems of poor compactness, shallow densification depth of the surface layer, and high requirements for refractory molds, and achieve mechanical properties. The effect of improving and improving the tendency of crystallization

Inactive Publication Date: 2011-02-16
NANCHANG HANGKONG UNIVERSITY
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Problems solved by technology

However, the preparation of architectural glass-ceramic by sintering molding method has the disadvantages of shallow densification depth of the surface layer (about 2 mm); the pores between glass particles are difficult to get rid of, and the compactness is poor; the product is prone to deformation and has high requirements for refractory molds.
The proportion of the crystallite phase in glass-ceramics prepared by melting method depends on the overall crystallization ability of the base glass. Due to the limitation of the composition of ordinary soda-lime-silica glass, the crystallization ability of the base glass is poor. The technology of building glass-ceramics with glass waste as the main material is still rarely reported

Method used

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  • Method for preparing calcium aluminosilicate nanometer microcrystal glass by utilizing natrium silica calcium glass waste slag
  • Method for preparing calcium aluminosilicate nanometer microcrystal glass by utilizing natrium silica calcium glass waste slag

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Embodiment 1

[0020] The specific implementation process is as follows:

[0021] (1) Collection of glass waste slag: sort the sodium silicate calcium glass waste slag, grind it for 4 hours, and then sieve it to obtain 80-200

[0022] purpose glass powder;

[0023] (2) Ingredients: ingredients by weight: soda-silicate-calcium glass powder 50%; silicon dioxide 22%; calcium carbonate 18%; alumina 4.5%; boric acid 1.5%; Conventional crystal nucleating agent: 2% titanium dioxide + 2% zirconium dioxide ;

[0024] (3) Melting: Put the above-mentioned prepared materials into a high-temperature furnace for melting, the melting temperature is 1450°C, and the holding time is 4 hours;

[0025] (4) Forming: Pour the molten glass into the mold to form;

[0026] (5) Crystallization and nucleation: put the shaped glass into a horse-brew furnace, nucleate at 720°C for 90 minutes, heat up to 1000°C for 120 minutes, and then cool to room temperature with the furnace;

[0027] (6) Grinding and polishing. ...

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Abstract

The invention provides a method for preparing calcium aluminosilicate nanometer microcrystal glass by utilizing natrium silica calcium glass waste slag. The method comprises the following steps: 1) classifying, grinding and screening natrium silica calcium glass waste slag to prepare glass powder; 2) adding silicon dioxide, calcium oxide, aluminum oxide, boron oxide, TiO2 / P2O5 composite nucleating agent and rare-earth oxide to ensure that component requirement of the calcium aluminosilicate (CAS) microcrystal glass can be fulfilled; 3) filling the uniformly mixed glass materials into a high-alumina crucible, and pouring into a die to press and mold; and 4) putting the pressed glass plate in a muffle furnace for heat treatment, cooling to room temperature with the furnace after heat treatment to obtain the CAS nanometer microcrystal glass. The method has the advantages that: (1) the mechanical performance of the microcrystal glass is greatly improved; and (2) the additive dosage is adjusted according to the component composition of the glass residues to ensure that the glass achieves the regulated formula proportion. The method is suitable for the conventional various civil natrium silica calcium glass waste slag.

Description

technical field [0001] The invention relates to a method for nano-glass ceramics, in particular to a method for preparing calcium-aluminum-silicon nano-glass-ceramics by utilizing waste slag of nano-silicon-calcium glass. Background technique [0002] Glass-ceramics, also known as glass-ceramics, is a polycrystalline solid material containing a large number of microcrystalline phases obtained by heat-treating certain basic glasses of specific composition. Calcium-aluminum-silicate (CAS) glass-ceramics can use mine tailings, metallurgical slag, fly ash, etc. as the main raw materials, and the production process is non-polluting, and the product is non-radioactive, so it is also called environmental protection material or green material. The performance, decorability and service life of CAS glass-ceramics are superior to those of natural stone, artificial stone and floor tiles. They have been used in high-end buildings such as hotels, stations, airports, office buildings, sub...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/14C03C6/10
Inventor 卢金山彭长浩董伟江洪流
Owner NANCHANG HANGKONG UNIVERSITY
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