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Preparation method of low-hydroxyl solid quartz steelyard weight

A quartz ingot, low hydroxyl technology, used in glass manufacturing equipment, manufacturing tools, glass molding and other directions, can solve the problems of low softening point, poor temperature resistance and high hydroxyl content of quartz products, and achieve low hydroxyl content and softening point. High and good temperature resistance

Active Publication Date: 2013-08-28
久智光电子材料科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of this method are: using a hydrogen-oxygen flame as a heat source, the hydroxyl content in the quartz ingot is high, generally 200ppm-300ppm, the quartz product with high hydroxyl content has a low softening point, poor temperature resistance, and low strength, and is not suitable for semiconductors. Quartz products and core components that require high performance in the fields of solar energy, high-end light sources, etc.

Method used

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  • Preparation method of low-hydroxyl solid quartz steelyard weight
  • Preparation method of low-hydroxyl solid quartz steelyard weight
  • Preparation method of low-hydroxyl solid quartz steelyard weight

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: The flame generated by the plasma device is used as the heat source for melting quartz glass; the plasma device is placed on the top of the furnace, and the melting temperature, that is, the surface temperature of the quartz ingot is 1800°C to 2500°C.

[0027] Spray the quartz powder that enters the flame zone through the feeding tube onto the quartz glass target holder, and under the heating of the plasma flame, it will be continuously melted into a glass state, and the melt will start to accumulate on the target holder;

[0028] After the molten glass leaves the high temperature zone, it gradually cools down to become a columnar solid glass ingot. The top of the quartz glass target holder is located in the high temperature zone of the plasma flame. One side of the target holder rotates at a constant speed of 5 rpm, and the other side descends. The descending speed: 0.2mm / min, the feeding amount: 1.4kg / h, melting for 42 hours, and Ensure that the distance...

Embodiment 2

[0030] Embodiment 2: The flame generated by the plasma device is used as the heat source for melting quartz glass; the plasma device is placed on the top of the furnace, and the melting temperature, that is, the surface temperature of the quartz ingot is 1800°C to 2500°C.

[0031] The quartz powder is fed in from the central airflow of the plasma device, enters the flame zone, is sprayed onto the quartz glass target holder under the heating of the plasma, continuously melts into a glass state, and begins to accumulate melt on the target holder;

[0032] After the molten glass leaves the high temperature zone, it gradually cools down to become a columnar solid glass ingot. The top of the quartz glass target holder is located in the high temperature zone of the plasma flame. One side of the target holder rotates at a constant speed of 8 rpm, and the other side descends. The descending speed is 0.3mm / min, the feeding amount: 2.5kg / h, and is melted for 58 hours. Ensure that the di...

Embodiment 3

[0034] Embodiment 3: The flame generated by the plasma device is used as the heat source for melting quartz glass; the plasma device is placed on the top of the furnace, and the melting temperature, that is, the temperature on the surface of the quartz ingot is 1800°C to 2500°C.

[0035] Spray the quartz powder that enters the flame zone through the feeding tube onto the quartz glass target holder, and under the heating of the plasma flame, it will be continuously melted into a glass state, and the melt will start to accumulate on the target holder;

[0036] After the molten glass leaves the high temperature zone, it gradually cools down to become a columnar solid glass ingot. The top of the quartz glass target holder is located in the high temperature zone of the plasma flame. One side of the target holder rotates at a constant speed of 10 rpm, and the other side descends. The descending speed is 0.3mm / min, the feeding amount: 4.0kg / h, and is melted for 84 hours. Ensure that ...

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Abstract

The invention relates to a preparation method of a low-hydroxyl solid quartz steelyard weight and belongs to the field of quartz glass melting technology. A plasma device, instead of a hydrogen and oxygen flame burner in the traditional gas-refining equipment for fabrication of steelyard weights, is used as a heat source in the invention. Quartz powders are delivered into the plasma device or into a flame area through a tremie pipe and then will be sprayed on a quartz glass target holder. A constant distance between the target surface and the plasma flame front is maintained through an uniform rotation and a descending motion of the quartz target holder. Powders can be placed in the area with the highest temperature all along. Therefore, powders are continuously melted and then will be cooled into a solid glass steelyard weight. The quartz steelyard weight prepared in the invention is characterized by the high purity, the low hydroxyl content, the high softening point, the good heat resistance performance, the high strength or the like in combination with traditional gas-refined steelyard weights. It can be widely applied in high-tech fields with all kinds of requirements for high-performance quartz products.

Description

technical field [0001] The invention relates to a method for preparing quartz products, in particular to a method for preparing a low-hydroxyl solid quartz ingot. Background technique [0002] The prior art for preparing solid quartz ingots is mainly the vertical gas refining ingot method. Regardless of whether continuous gas refining or intermittent gas refining is used to make ingots, the vertical ingot machine is used as the heat source, and the temperature is 1850°C-1950°C to melt the quartz powder into quartz ingots, such as figure 1 As shown, the quartz powder enters the burner from the feeding pipe, and is melted into a quartz ingot by a hydrogen-oxygen flame. The disadvantages of this method are: the hydrogen-oxygen flame is used as the heat source, and the hydroxyl content in the quartz ingot is high, generally 200ppm-300ppm. Quartz products with high hydroxyl content have low softening point, poor temperature resistance, and low strength, so they are not suitable ...

Claims

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Application Information

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IPC IPC(8): C03B20/00
Inventor 张锦王春玲谷巨明秦卫光孙丽丽李文彦刘晓光张春林
Owner 久智光电子材料科技有限公司
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