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Additive capable of prolonging service life of chemically strengthened fused salt

A technology of chemical tempering and additives, which is applied in the tempering of glass, glass manufacturing equipment, glass production, etc., can solve the problems of mass production of unfavorable products, increase the production capacity of molten salt per unit, reduce production costs, and improve ion exchange activity. Effect

Active Publication Date: 2013-03-27
LENS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the wide application of glass lenses, some products put forward higher requirements on the chemical strengthening performance indicators of glass lenses, and some even require that the surface stress of the lens after chemical toughening needs to reach 800MPa or more (general products only need to reach 400MPa It can fully meet the requirements of use), which requires us to use molten salt with a relatively high purity for tempering, but the molten salt used in chemical tempering itself is a consumable, with the increase in the number of tempered products, its molten salt The purity will also decrease accordingly. When the purity of the molten salt decreases to a certain level, all the molten salt must be replaced to achieve the corresponding tempering performance index.
In other words, if you want to achieve a higher chemical toughening performance index, you must take frequent replacement of molten salt to achieve it, which is not conducive to mass production of products

Method used

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  • Additive capable of prolonging service life of chemically strengthened fused salt
  • Additive capable of prolonging service life of chemically strengthened fused salt
  • Additive capable of prolonging service life of chemically strengthened fused salt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Potassium carbonate: potassium bicarbonate: potassium nitrate: potassium nitrite: potassium chloride + diatomaceous earth + antimony trioxide=5:2:63:25:3.5+1+0.5.

[0026] For the corresponding relationship curve between the concentration of molten salt after chemical tempering and the surface stress of the tempered product, see figure 2 .

[0027] molten salt concentration

Embodiment 2

[0029] Potassium carbonate: Potassium bicarbonate: Potassium nitrate: Potassium nitrite: Potassium chloride + diatomaceous earth + antimony trioxide = 5:3:62:25:3.5+1+0.5.

[0030] For the corresponding relationship curve between the concentration of molten salt after chemical tempering and the surface stress of the tempered product, see image 3 .

[0031] molten salt concentration

Embodiment 3

[0033] Potassium carbonate: Potassium bicarbonate: Potassium nitrate: Potassium nitrite: Potassium chloride + diatomaceous earth + antimony trioxide=5:4:61:25:3.5+1+0.5.

[0034] For the corresponding relationship curve between the concentration of molten salt after chemical tempering and the surface stress of the tempered product, see Figure 4 .

[0035] molten salt concentration

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Abstract

The invention discloses an additive capable of prolonging the service life of chemically strengthened fused salt, which comprises the following major constituents: several kinds of carbonates, bicarbonates, nitrates, nitrites and other active constituents, wherein the ratio of carbonates to bicarbonates to nitrates to nitrites to others is 5:2-5:60-63:25:5. The invention has the characteristics of low cost, rapid effect taking and the like. The additive can effectively prolong the service life of fused salt, increase the yield of fused salt per unit and play the function of reducing production cost.

Description

technical field [0001] The invention relates to an additive, in particular to an additive capable of prolonging the service life of chemical tempering molten salt. Background technique [0002] In the lens processing industry, in order to improve the surface hardness and impact resistance of the product, it is required to chemically toughen the lens to achieve a certain strength to meet the use requirements. However, with the wide application of glass lenses, some products put forward higher requirements on the chemical strengthening performance indicators of glass lenses, and some even require that the surface stress of the lens after chemical toughening needs to reach 800MPa or more (general products only need to reach 400MPa It can fully meet the requirements of use), which requires us to use molten salt with a relatively high purity for tempering, but the molten salt used in chemical tempering itself is a consumable, with the increase in the number of tempered products, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03B27/03
CPCY02P40/57
Inventor 周群飞
Owner LENS TECH