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Crucible for electronic industry and method for purifying high-purity quartz sand as lining material

A technology of high-purity quartz sand and electronics industry, which is applied in the field of purification of high-purity quartz, can solve problems that restrict the development of high-tech industries and technological upgrading, and achieve remarkable purification effects, increase industrial value, and simple processes

Active Publication Date: 2012-09-05
JIANGSU SHENGDA QUARTZ PROD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, domestic high-purity quartz crucibles and lining materials have not yet been mass-produced. If they cannot catch up with the world's advanced level, it will inevitably restrict the further development and technological upgrading of my country's high-tech industries.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0024] Embodiment: purify quartz stone according to the following specific steps:

[0025] ⑴ Mineral dressing: choose quartz stone with a content of aluminum, iron, calcium, magnesium, titanium, nickel, manganese, copper, sodium, potassium, cobalt and boron not higher than 50ppm and a silica content of about 99.95% as raw material ; Generally, at the mine site where quartz is mined, it is first observed directly with the naked eye, and then brought back for testing, testing, and testing again, and finally determines whether it can meet the requirements for use. At 3-5 cm, and graded, select high-quality quartz blocks;

[0026] (2) Water quenching: that is, roasting. Put the selected high-quality quartz block into a 950°C resistance furnace, roast for 4 hours, and then put it in a stainless steel water tank with cooling water. The impurities in the quartz stone are fully exposed and broken; the inclusions and other impurities in the quartz block overflow at the same time as th...

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PUM

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Abstract

The invention discloses a crucible for the electronic industry and a method for purifying high-purity quartz as a lining material. The method for purifying the high-purity quartz sand comprises the following steps of: oredressing, water quenching, flotation, scouring, magnetic separation, high-temperature vacuum treatment, chlorination, superconductive purification, electric separation, ultrasonic treatment, rectification and purification and electric screening. The purification method provided by the invention has the advantages of simple process and remarkable purification effect; and the obtained high-purity quartz is used for a high-purity quartz crucible and the lining material in the electronic industry and improves the industrial value of quartzite.

Description

technical field [0001] The invention relates to a purification method, in particular to a purification method of a crucible used in the electronic industry and a high-purity quartz lining material. Background technique [0002] High-purity quartz crucibles for semiconductor and electronics industries are important vessel materials in high-tech fields such as semiconductor technology, optical fiber communications, special light sources, aerospace and national defense, especially low-aluminum, low-boron, and low-alkali quartz crucibles. Production Monocrystalline silicon must use high-purity low-alumina quartz crucibles, which are irreplaceable. They support an industry worth trillions of dollars. Raw materials are the key to producing high-quality high-purity quartz crucibles. Internationally, it can be seen from the IOTA series ultra-pure quartz sand quality index table of the U.S. Unimin Company that the IOTA-standard aluminum content is 16.2ppm, the IOTA-6 aluminum content...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/12
Inventor 段其九段玉伟谢大春
Owner JIANGSU SHENGDA QUARTZ PROD CO LTD