Silicon Metal

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Introduction to silicon metal

Silicon metal, also known as crystalline silicon or industrial silicon, is mainly used as an additive for non-iron-based alloys. Silicon metal is a product smelted from quartz and coke in an electric furnace. The main component silicon content is about 98% (in recent years, 99.99% Si content is also included in Silicon metal), and the remaining impurities are iron and aluminum. , calcium, etc.

Additional products of Silicon metal include silicon powder, edge silicon, black silicon, Silicon metal slag, etc. Among them, silica powder, also known as silica fume, microsilica fume or silica fume, is widely used in the refractory and concrete industries.

Classification of Silicon metal

The classification of Silicon metal is usually based on the content of the three main impurities of iron, aluminum, and calcium contained in the Silicon metal component. According to the content of iron, aluminum, and calcium in Silicon metal, Silicon metal can be divided into different grades such as 553, 441, 411, 421, 3303, 3305, 2202, 2502, 1501, and 1101.

Industrially, Silicon metal is usually produced by reducing silica with carbon in an electric furnace. Chemical reaction equation: SiO2 + 2C → Si + 2CO The purity of the silicon produced in this way is 97~98%, which is called Silicon metal. It is then melted and recrystallized, and impurities are removed with acid to obtain Silicon metal with a purity of 99.7~99.8%.

Uses of silicon metal

1、Preparation of high-purity semiconductor materials

Silicon metal is used for: producing high-purity semiconductor materials and silicon metal with a purity of 99.999 (5N). It is industrially purified elemental silicon. It is mainly used to produce organic silicon and is used in the 3C industry to produce high-purity semiconductor materials. In addition, it can also be used in various applications such as manufacturing alloys with special uses. Among them, those with lower grades are used in metal alloy ingredients—aluminum-silicon alloys, silicon brass alloys, silicon bronze alloys, etc.

2、Prepared alloy

Formulated alloys: Silicon-aluminum alloys are the most commonly used silicon alloys. Silicon-aluminum alloy is a strong composite deoxidizer. Replacing pure aluminum in the steelmaking process can improve the utilization rate of deoxidizer, purify molten steel, and improve steel quality.

3、Optical fiber communication materials

Optical fiber communication material Pure silica can be drawn into highly transparent glass fiber, which is an important material for optical fiber communication. This communication method replaces bulky cables, has high communication capacity, is not subject to electrical and magnetic interference, and is not afraid of Eavesdropping, with high confidentiality. Optical fiber communications have revolutionized human life.

4、High temperature resistant materials

High-temperature-resistant materials Silicon can be used to make cermet composite materials. This material inherits the respective advantages of metals and ceramics, while also making up for their shortcomings. It has the advantages of high-temperature resistance, toughness, and cutability.

5、Electronic industry

Electronics Industry Silicon metal is widely used in the electronics industry. First of all, silicon metal is an important raw material for manufacturing semiconductor materials, which can produce various transistors, integrated circuits and other electronic components.

6、Construction Industry

Construction Industry Silicon metal also has applications in the construction industry. First of all, silicon metal can be used as a raw material for manufacturing glass and ceramics, which can improve product quality and performance. Secondly, silicon metal is also needed in building materials, such as cement, concrete, etc.

How to distinguish the quality of silicon metal

Appearance

First of all, we can distinguish the quality of silicon metal from its appearance. Good silicon metal should have a smooth appearance, no cracks, bubbles, peeling and other defects, and a uniform color. Inferior silicon metal often has a poor appearance, may have many defects, and is uneven in color.

Impurities

Impurities are also an important indicator for judging the quality of silicon metal. High-quality silicon metal should have a small amount of impurities, and its impurity content should be lower than a certain standard, and the corresponding downstream processes should be able to meet the usage requirements. Inferior metal silicon will contain a large number of impurities, and the impurity content is higher than the standard, which can easily affect the quality and use effect of the product.

Purity

The purity of silicon metal is one of the important indicators to measure its quality. Good silicon metal should have high purity, low impurity content, and various indicators should meet relevant standards. Inferior metal silicon may have low purity. Low purity will reduce the physical and chemical properties of the product, thus affecting the use effect.

Processing technology

The processing technology of silicon metal is also an indicator of its quality. Good processing technology should be carried out in strict accordance with relevant standards, and excessive defects and contamination should be avoided during the processing process. Inferior metal silicon often has poor processing technology, lack of standards, lack of monitoring, and may even have process loopholes and defects.

Other indicators

In addition to the above aspects, there are other indicators to judge the quality of silicon metal, such as mechanical properties, electrical conductivity, thermal conductivity, etc. The difference in these indicators determines the scope, purpose and value of silicon metal. Therefore, when choosing metal silicon, you need to comprehensively consider all aspects of indicators based on specific needs and usage requirements to make the right choice.

Things to note when purchasing silicon metal

1. Supplier selection The first step in purchasing silicon metal is to select a suitable supplier. When selecting suppliers, companies should consider the following aspects:

①. Supplier’s strength and reputation: Choosing suppliers with stable strength and good reputation can reduce procurement risks and ensure transaction security.

②. Product quality and technical support: Enterprises should choose suppliers with stable supply capabilities, strict quality control and perfect after-sales service.

③. Price and delivery time: Price and delivery time are important factors that companies need to consider when choosing suppliers. A company's procurement costs and production plans will be affected by price and delivery time.

2. Quality inspection In the process of purchasing silicon metal, quality inspection is very important. It can be detected from the following aspects:

①. Appearance inspection: Smooth appearance, no bubbles, no damage, no obvious color differences, etc.

②. Chemical composition analysis: Carry out composition analysis according to product specifications and production standards.

③. Physical property measurement: including density, hardness, tensile strength, elongation, etc.

As one of the leading silicon metal manufacturers and suppliers in China, we warmly welcome you to buy high-grade silicon metal in stock here from our factory. All metal materials are with high quality and low price.

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