Preparation method of toughened glass

A technology for tempering glass and glass, applied in glass manufacturing equipment, glass furnace equipment, glass tempering and other directions to achieve the effect of reducing the content of bubbles

Active Publication Date: 2017-02-15
浙江九龙山实业股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But they are non-environmentally friendly sub

Method used

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Embodiment Construction

[0014] The present invention will be further described in detail below, so that those skilled in the art can implement it with reference to the description.

[0015] The invention provides a preparation method of tempered glass, comprising:

[0016] Step (1) Mixing 87-97 parts by weight of raw materials with 3-6 parts of glass fining agent to obtain a mixture, heating the mixture to 1755-1765 ℃ and melting, and then cooling to 1520 Clarify at ~1530℃, clarify for 20 ~ 25min, then heat up to 1620 ~ 1630℃, and then cool down to 1520 ~ 1530℃ to obtain glass liquid. The mass fraction of each component in the glass clarifying agent is: nitrate 3 ~ 4 part, 0.4-0.6 part of tin oxide, 0.3-0.5 part of calcium carbonate, 0.1-0.2 part of magnesium carbonate, wherein, nitrate is composed of the following components by weight percentage: 5-8% of sodium nitrate, 5-8% of potassium nitrate %, magnesium nitrate 5-8%, aluminum nitrate 5-8% and ammonium nitrate 68-80%. In the present invention,...

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Abstract

The invention discloses a preparation method of toughened glass. The preparation method comprises the following steps: (1) mixing 87 to 97 parts of raw materials with 3 to 6 parts of a glass clarifier to obtain a mixture, heating the mixture to the temperature of 1755 to 1765 DEG C to be molten, later lowering to the temperature of 1520 to 1530 DEG C to be clarified for 20 to 25min, then heating to the temperature of 1620 to 1630 DEG C, and lowering the temperature to 1520 to 1530 DEG C to obtain a glass melt, and (2) forming the glass melt; the glass clarifier comprises 3 to 4 parts of nitrate, 0.4 to 0.6 part of tin oxide, 0.3 to 0.5 part of calcium carbonate and 0.1 to 0.2 part of magnesium carbonate, wherein the nitrate comprises the following components in percentage by weight: 5 to 8% of sodium nitrate, 5 to 8% of potassium nitrate, 5 to 8% of magnesium nitrate, 5 to 8% of aluminum nitrate and 68 to 80% of ammonium nitrate. By adopting the preparation method of the toughened glass disclosed by the invention, the content of bubbles in the glass can be effectively reduced.

Description

technical field [0001] The invention relates to a preparation method of tempered glass. Background technique [0002] A large amount of gas is generated during the melting stage of glass production. Therefore, bubbles are one of the most common glass defects, which can affect the appearance, transparency, mechanical strength, optical uniformity, etc. of glass products, and the loss caused by this is more than hundreds of millions of dollars every year in the world. With the increasingly severe market competition, the quality requirements of customers are also getting higher and higher, so all glass manufacturers do their best to take measures to reduce bubble defects. The most common measures to eliminate bubbles are to increase the melting temperature and fining temperature. When the aluminosilicate glass (Al2O3>12%) produced by the float process has the disadvantages of difficulty in melting, clarification and homogenization, heavy glass ribs, and many bubble defects, ...

Claims

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Application Information

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IPC IPC(8): C03C1/00C03B5/225C03C6/04C03B27/03
CPCY02P40/57C03C1/004C03B5/225C03B27/03C03C1/00
Inventor 黄福萍
Owner 浙江九龙山实业股份有限公司
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