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A production process of quartz glass ingot

A technology of quartz glass and production process, which is applied in glass forming, glass manufacturing equipment, manufacturing tools, etc. It can solve the problems affecting the density of products and the difficulty of effectively removing air bubbles in quartz glass ingots, so as to optimize the density and eliminate air bubbles Effect

Active Publication Date: 2018-09-21
ADVANCED FOR MATERIALS & EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the actual operation process, due to the particularity of the quartz glass raw material itself, coupled with the limitations of the existing quartz glass ingot production process, it is difficult to effectively remove the air bubbles inside the quartz glass ingot during the production process of the quartz glass ingot, which is extremely difficult. Greatly affects the density of the product

Method used

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  • A production process of quartz glass ingot

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] 1. Place 100Kg of fine quartz sand in the ingot furnace, and vacuum the inside of the ingot furnace until the internal pressure of the ingot furnace is 10Pa;

[0049] 2. Heat up the fine quartz sand. When the internal temperature of the ingot furnace rises to 980℃, let in argon gas until the internal pressure of the ingot furnace reaches 26.4Pa; continue to heat the fine quartz sand to increase the temperature. When the temperature reaches 1820℃, keep it for 2h, raise the internal temperature of the ingot furnace again until 1840℃, keep it for 19h; continue to heat the fine quartz sand, when the internal temperature of the ingot furnace rises to 1850℃, keep it for 27.5h;

[0050] 3. Increase the internal argon pressure of the ingot furnace until the internal pressure of the ingot furnace reaches 1.034MPa and maintain the pressure for 2.5h;

[0051] 4. Cool down the melt formed after the fine quartz sand is melted, and reduce the internal pressure of the ingot furnace at the sa...

Embodiment 2

[0058] 1. Place 150Kg of fine quartz sand in the ingot furnace, and vacuum the inside of the ingot furnace until the internal pressure of the ingot furnace is 11Pa;

[0059] 2. Heat up the fine quartz sand. When the internal temperature of the ingot furnace rises to 981℃, let in argon gas until the internal pressure of the ingot furnace reaches 26.5 Pa; continue to heat the fine quartz sand to increase the temperature. When the temperature reaches 1822℃, keep it for 2.2h, and raise the internal temperature of the ingot furnace again until it is maintained at 1842℃ for 19.5h; continue to heat the fine quartz sand, when the internal temperature of the ingot furnace rises to 1852℃, keep it for 27.8h ;

[0060] 3. Increase the internal argon pressure of the ingot furnace until the internal pressure of the ingot furnace reaches 1.035MPa and maintains the pressure for 2.6 hours;

[0061] 4. Cool down the melt formed after the fine quartz sand is melted, and reduce the internal pressure of...

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Abstract

The invention discloses a quartz glass ingot production technology based on an ingot furnace capable of being vacuated. The quartz glass ingot production technology includes the steps that firstly, a quartz glass material is placed in the ingot furnace, and the ingot furnace is vacuated; secondly, the quartz glass material is heated and melted, and inert gas is introduced into the ingot furnace to gain partial pressure; thirdly, the pressure of the inert gas in the ingot furnace is increased till the gas pressure in the ingot furnace is higher than atmospheric pressure; fourthly, melt formed after the quartz glass material is melted is cooled, and meanwhile the gas pressure in the ingot furnace is decreased; fifthly, when the temperature in the ingot furnace is decreased to a first preset temperature, a quartz glass ingot formed in the ingot furnace is taken out and naturally cooled. The quartz glass ingot production technology can effectively avoid bubbles and meet the requirement for product compactness.

Description

Technical field [0001] The invention relates to the field of glass manufacturing, and more specifically, to a production process of quartz glass ingots. Background technique [0002] Quartz glass is a special industrial technical glass with a single component of silicon dioxide. It is mainly made of crystal, silica, and silicide as raw materials through high-temperature melting or chemical vapor deposition. Quartz glass has very good light transmittance, and has extremely high transmittance to the full range of ultraviolet, visible and infrared; quartz glass has good high temperature resistance and is a transparent refractory material. The use temperature is as high as 1100 ℃, which is better than ordinary Glass is 700°C high; in addition, the expansion coefficient of quartz glass is extremely low, equivalent to one-twentieth of ordinary glass, and its thermal stability is particularly good. Therefore, quartz glass has been widely used in high-tech fields such as new electric li...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03B20/00
CPCC03B20/00
Inventor 戴煜张志辉
Owner ADVANCED FOR MATERIALS & EQUIP