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Microcrystalline glass mainly containing spinel and preparation method thereof

A technology of glass-ceramics and spinel, which is applied in the field of glass-ceramics and its preparation, can solve problems such as scratches or wear, affect decorative effects and service life, and achieve extended service life, good chemical stability, and high hardness Effect

Inactive Publication Date: 2020-07-28
CDGM OPTICAL GLASS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The Mohs hardness of wollastonite, anorthite, anorthite and diopside crystals is 6H, while the Mohs hardness of commonly used knives is 5.5-6H, and the Mohs hardness of silicon dioxide contained in gravel or dust is 7H. It can cause scratches or abrasions on the surface of existing architectural glass-ceramics, affecting its decorative effect and service life

Method used

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Effect test

preparation example Construction

[0039] The preparation method of the present invention comprises the following steps:

[0040] (a) Ingredients

[0041] According to the weight composition content of the precursor glass, where MgO, Na 2 O, K 2 O is introduced as carbonate, nitrate or sulfate, and other components are introduced as oxides. According to the weight ratio, weigh the weight of the raw material, pour it into the mixer, and mix it evenly as the precursor glass raw material;

[0042] (b) Melting

[0043] Put the above-mentioned precursor glass raw material into the melting furnace, melt and clarify at high temperature, dissolve the precursor glass raw material into a high-temperature glass stock solution, and remove bubbles and foreign matter in the high-temperature glass stock solution;

[0044] (c) Forming and annealing

[0045] The molten high-temperature glass stock solution is molded by cooling in a hot mold at a certain temperature out of the furnace, or formed by float method or pressing ...

Embodiment 1

[0051] Firstly mix 60% SiO by weight 2 , 20% Al 2 o 3 , 8% MgO, 1% Na 2 O, 1% K 2 O, 2% ZnO, 5% TiO 2 , 2% ZrO 2 , 0.5% P 2 o 5 and 0.5% Sb 2 o 3 Weigh it out, and then put it all into the V-shaped mixer and mix it thoroughly as the precursor glass raw material;

[0052] Then put the prepared precursor glass raw material into the electric furnace, melt it at 1600°C for 8 hours, clarify it at 1650°C for 10 hours, then cool down the molten glass to 1600°C and take it out of the furnace, and shape it through a mold. The mold temperature is 200°C, blowing cooling is carried out during molding, and the prepared glass is roughly annealed in a muffle furnace at 680°C.

[0053] Put the prepared glass into a high-temperature furnace for heat treatment. The heat treatment process includes two stages of crystal nucleus precipitation and crystallite growth. In the stage of crystal nucleus precipitation, the temperature in the muffle furnace is kept at 800°C for 2 hours. Generat...

Embodiment 2

[0055] Firstly mix 60% SiO by weight 2 , 20% Al 2 o 3 , 8% ZnO, 1% Na 2 O, 1% K 2 O, 2% MgO, 5% TiO 2 , 2% ZrO 2 , 0.5% P 2 o 5 and 0.5% Sb 2 o 3 Weigh it out, and then put it all into the mixer and mix it thoroughly as the precursor glass raw material;

[0056] Then put the prepared precursor glass raw material into the electric furnace, melt it at 1600°C for 7 hours, clarify it at 1650°C for 10 hours, then cool down the molten glass to 1600°C and take it out of the furnace, and shape it through a mold. The mold temperature is 300°C, blowing cooling is carried out during molding, and the prepared glass is roughly annealed in a muffle furnace at 680°C.

[0057] Put the prepared glass into a high-temperature furnace for heat treatment. The heat treatment process includes two stages of crystal nucleus precipitation and crystallite growth. In the stage of crystal nucleus precipitation, the temperature in the muffle furnace is kept at 750 ° C for 4 hours. Generate as ma...

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Abstract

The invention provides microcrystalline glass taking spinel as a main component. The microcrystalline glass comprises the following components in percentage by weight: 47.5-70.0% of SiO2, 10.0-20.0% of Al2O3, 0-22.0% of MgO, and 0-12.5% of ZnO; wherein the total content of MgO and ZnO is 6% or above, and the crystallized glass contains microcrystals of spinel crystals. By using a proper precursorglass for heat treatment, microcrystal is separated out from a glass matrix through crystallization, so that the microcrystal glass mainly containing spinel is prepared, the Moh's hardness of the glass is 7.5-8, the glass can have different colors, the scratching problem of building microcrystal glass mainly containing wollastonite is solved, and the service life is prolonged. The microcrystallineglass mainly containing spinel has the characteristics of high mechanical strength, high hardness, favorable wear resistance, favorable electric insulativity and the like, and can be used as architectural decoration materials, chemical and anticorrosive materials, mine wear-resistant materials and the like.

Description

[0001] This application is a divisional application of a Chinese invention patent application with an application date of November 19, 2014, an application number of 201410665147.2, and an invention title of "Spinel-based glass-ceramic and its preparation method". technical field [0002] The invention relates to a spinel-based glass-ceramic and a preparation method thereof, belonging to the technical field of glass ceramics. Background technique [0003] Glass-ceramics is a glass that combines the advantages of glass, ceramics and natural stone. It has excellent thermodynamic properties, high chemical stability, a wide range of adjustable thermal expansion coefficients, excellent insulation, high wear resistance and high softening These characteristics determine that glass-ceramic occupies an important position in the field of materials science, and can be used in the fields of building curtain walls and indoor high-end decoration, chemical and anti-corrosion materials, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/02
Inventor 原保平苏学剑于天来
Owner CDGM OPTICAL GLASS
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