A method for improving fracture toughness and strength of aluminosilicate glass

An aluminosilicate glass and fracture toughness technology, applied in the field of glass strengthening, can solve problems such as low glass strength and inability to meet glass strength requirements, and achieve the effect of small strength dispersion, high fracture toughness and strength, and improved fracture toughness

Active Publication Date: 2019-06-04
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the strength of engineering stress distribution glass is low, which cannot meet the strength requirements of windshields such as modern aircraft and high-speed trains.

Method used

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  • A method for improving fracture toughness and strength of aluminosilicate glass
  • A method for improving fracture toughness and strength of aluminosilicate glass
  • A method for improving fracture toughness and strength of aluminosilicate glass

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A method for improving the fracture toughness and strength of aluminosilicate glass, the steps of the method are:

[0016] (1) Cutting, edging, cleaning and drying the aluminosilicate glass.

[0017] (2) Put the washed and dried aluminosilicate glass into a high-temperature furnace for annealing treatment, the annealing temperature is 500°C, and the annealing time is 6h.

[0018] (3) Put the annealed aluminosilicate glass into a nitriding furnace for nitriding treatment. The specific nitriding parameters are: increase the temperature at 2°C / min to 520°C, hold for 3 hours, and the ammonia decomposition rate is 15%, then increase the temperature at 5°C / min to 550°C, hold for 5 hours, and the ammonia decomposition rate is 40%. , and then cool the furnace to room temperature.

[0019] (4) Put the nitrided aluminosilicate glass into a chemical strengthening furnace for chemical strengthening, the chemical strengthening temperature is 430° C., and the chemical strengthening...

Embodiment 2

[0024] A method for improving the fracture toughness and strength of aluminosilicate glass, the steps of the method are:

[0025] (1) Cutting, edging, cleaning and drying the aluminosilicate glass.

[0026] (2) Put the cleaned and dried aluminosilicate glass into a high-temperature furnace for annealing treatment, the annealing temperature is 550° C., and the annealing time is 8 hours.

[0027] (3) Put the annealed aluminosilicate glass into a nitriding furnace for nitriding treatment. The specific nitriding parameters are: increase the temperature at 4°C / min to 540°C, hold for 4 hours, and the ammonia decomposition rate is 25%, then increase the temperature at 7°C / min to 570°C, hold for 6 hours, and the ammonia decomposition rate is 60%. , and then cool the furnace to room temperature.

[0028] (4) Put the nitrided aluminosilicate glass into a chemical strengthening furnace for chemical strengthening, the chemical strengthening temperature is 435° C., and the chemical stren...

Embodiment 3

[0033] A method for improving the fracture toughness and strength of aluminosilicate glass, the steps of the method are:

[0034] (1) Cutting, edging, cleaning and drying the aluminosilicate glass.

[0035] (2) Put the cleaned and dried aluminosilicate glass into a high-temperature furnace for annealing treatment, the annealing temperature is 530°C, and the annealing time is 7h.

[0036] (3) Put the annealed aluminosilicate glass into a nitriding furnace for nitriding treatment. The specific nitriding parameters are: increase the temperature at 3°C / min to 530°C, hold for 4 hours, and the ammonia decomposition rate is 20%, then increase the temperature at 6°C / min to 560°C, hold for 5 hours, and the ammonia decomposition rate is 50%. , and then cool the furnace to room temperature.

[0037] (4) Put the nitrided aluminosilicate glass into a chemical strengthening furnace for chemical strengthening, the chemical strengthening temperature is 430° C., and the chemical strengthenin...

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Abstract

The invention relates to the technical field of glass strengthening, and particularly relates to a method for improving breaking tenacity and strength of aluminum silicate glass. The method includes steps: (1), cutting, edge-grinding, washing, and drying the aluminum silicate glass; (2), putting the aluminum silicate glass after being washed and dried in a high-temperature furnace for annealing treatment; (3), putting the aluminum silicate glass after being annealed in a nitrogen doping furnace for nitrogen doping treatment; (4), putting the aluminum silicate glass after being doped with nitrogen in a chemical strengthening furnace for chemical strengthening; (5), after chemical strengthening is completed, taking the glass out, washing and drying the glass. Nitrogen doping technology is applied in the field of glass surface treatment, so that breaking tenacity of the glass is improved; chemical strengthening technology is combined, so that strength of the glass is improved. The glass prepared by adopting the method is high in breaking tenacity and strength and little in dispersion. The method is simple in process and suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of glass strengthening, in particular to a method for improving the fracture toughness and strength of aluminosilicate glass. Background technique [0002] Glass is an amorphous and brittle material. Generally speaking, the fracture toughness of glass is small (<1.0). In addition, due to the existence of a large number of microcracks on the glass surface, its actual strength is far less than the theoretical strength. For this reason, scientific and technological workers have invented several methods to improve the strength of glass over the past few decades, including physical tempering, chemical strengthening, acid corrosion strengthening, and coating strengthening. Although these strengthening methods can significantly increase the strength of the glass, they are far from the theoretical strength (the three-point bending strength is generally below 700MPa), and the above-mentioned strengthening method...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C21/00
CPCC03C21/00C03C21/001
Inventor 姜良宝颜悦李晓宇郭新涛厉蕾
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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