What are the uses of high-purity quartz sand (silica sand)?

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What is high purity quartz sand?

The main substance of quartz sand is silica (SiO2), and high-purity quartz sand has a silica content higher than 99.9%. It is white powder, has no abnormal color, and has very low impurity content.

(quartz sand ore sample)

The main uses of high-purity quartz sand< /h3>

Quartz glass is an industrial technical glass made by melting a single component of silicon dioxide. It has high temperature resistance, low expansion coefficient, thermal shock resistance, excellent chemical stability, and excellent electrical insulation. With the advancement of science and technology, high-purity quartz is widely used in high-tech industries such as optical fiber communications, solar photovoltaics, aerospace, electronics and semiconductors.

1. High-purity quartz sand is used for optical fiber communication

Optical fiber is a light transmission tool. Light transmission is carried out through both ends of the fiber. It is widely used in the optical fiber communication industry. Optical fiber Communication has high anti-interference, fast speed and large transmission capacity, and has become an important pillar of modern communication. Plastic optical fiber and silica optical fiber are the two main types of optical fiber. Compared with plastic optical fibers, quartz optical fibers developed earlier, have mature technology, and are widely used due to their excellent performance characteristics.

In the optical fiber industry, artificial quartz is the main raw material for waveguides. Fiber optic technology is widely used in industries such as navigation, medical and military. Among them, sensors are an important application of optical fibers. The cladding, coating layer, and core are components of the optical fiber. When the coating layers are different, the optical fiber will change accordingly according to changes in the external environment, expanding the application scope of the optical fiber. For example, fiber optic temperature sensors can be made by coating optical fibers with a layer of lead metal, and sensors that detect hydrogen gas can be made by coating optical fibers with a layer of palladium metal.

2. High-purity quartz sand is used in the semiconductor industry

Semiconductors are materials between conductors and insulators at room temperature. Semiconductor components are widely used in communications, 3C, computers and other fields. The processing of ultra-clean studio wafers and quartz crucibles are applications of high-purity quartz products in the semiconductor industry. The semiconductor industry requires the use of quartz sand with high purity.

Quartz crucibles are used to grow single crystal silicon. The molten quartz has high thermal stability and purity, and is the raw material for quartz products used in the semiconductor industry. Usually during the rapid heat treatment of wafers, in order to effectively prevent secondary contamination of the wafer, the purity of quartz is required to be high.

3. High-purity quartz sand is used in the photovoltaic industry

Quartz is one of the key raw materials in the photovoltaic industry. Its main application forms include quartz crucibles, quartz tubes and various quartz equipment. Monocrystalline silicon and polycrystalline silicon in the photovoltaic industry are both high-purity materials, which requires that the supporting quartz materials be high-purity. It is generally required that the silica content of quartz sand for photovoltaic use should be greater than or equal to 99.99%, and the total content of impurity elements should be less than or equal to 25ug/g.

4. High-purity quartz sand is used in the optical industry

Optical glass has stable optical properties and high optical uniformity, and is widely used in the fields of optical transmission, optical storage and optoelectronic display. Glass materials that can be used to manufacture lenses, prisms, mirrors, windows, etc. for microscopic optical instruments or mechanical systems.

High-purity quartz sand plays a key role as the main raw material in glass batch materials, accounting for 60%-80% of glass batch materials. The quality of glass batch materials is not only related to the quality of optical glass products, but also affects the service life of glass melting furnaces. The use environment of optical glass products has high requirements on impurity content, refractive index, light transmittance, microscopic defects, etc. , all these factors have strict quality requirements for the main raw material quartz sand. High-purity quartz sand is an excellent raw material for high-precision and high-resolution optical glass.

The above is the application range of high-purity quartz sand. In order to obtain high-purity quartz sand, it needs to be purified through technology to reach a purity suitable for industrial application. Xinhai Mine is installed in quartz sand silica sand In terms of mineral processing and purification, with more than 20 years of experience, we can not only provide quartz sand mineral processing and purification process solutions, but also provide complete sets of quartz sand purification equipment.

Content is excerpted from: PDF document information on the preparation and application research progress of high-purity quartz sand