DX Silicon Metal Industry Co.,Ltd

Xiamen DX Silicon Metal Industry Co.,Ltd was founded in 1996. manufacture and export of silicon metal, high purity Silicon metal -- Polycrystalline silicon, silicon carbide powders, Silicon carbide Crystal, Silicon Grain, Aluminum silicon alloys, Silicon wafer – Quality silicon metal use in electronics, aeronautic, metallurgy and chemical industry.

Silica (chemical name for the mineral quartz and a synonym for silicon dioxide) : Used in manufacture of special steels and cast iron, aluminum alloys, glass and refractory materials, ceramics, abrasives, water filtration, component of hydraulic cements, filler in cosmetics, pharmaceuticals, paper, insecticides, rubber reinforcing agent - especially for high adhesion to textiles, anti-caking agent in foods, flatting agent in paints, thermal insulator. Fused silica is used as an ablative material in rocket engines, spacecraft, silica fibers used in reinforced plastics.

Silicon metal of the electronics industry applications

Silicon metal is important to the electronic industry, as it is the base material used in the manufacture of high purity polycrystalline silicon. These products are used in the manufacture of semiconductors, microchips for computers and solar cells used to capture electrical energy from the sun.

We have established valuable long-term relationships with the producers of polysilicon. More than 90% of all electronic components are based on silicon.

Pure silicon is used to produce ultra-pure silicon wafers used in the semiconductor industry, in electronics and in photovoltaic applications. Ultra-pure silicon can be doped with other elements to adjust its electrical response by controlling the number and charge (positive or negative) of current carriers. Such control is necessary for transistors, solar cells, integrated circuits, microprocessors, semiconductor detectors and other semiconductor devices which are used in electronics and other high-tech applications. In Photonics, silicon can be used as a continuous wave Raman laser medium to produce coherent light, though it is ineffective as a light source. Hydrogenated amorphous silicon is used in the production of low-cost, large-area electronics in applications such as LCDs, and of large-area, low-cost thin-film solar cells.Pure silicon is used to produce ultra-pure silicon wafers used in the semiconductor industry, in electronics and in photovoltaic applications. Ultra-pure silicon can be doped with other elements to adjust its electrical response by controlling the number and charge (positive or negative) of current carriers. Such control is necessary for transistors, solar cells, integrated circuits, microprocessors, semiconductor detectors and other semiconductor devices which are used in electronics and other high-tech applications. In Photonics, silicon can be used as a continuous wave Raman laser medium to produce coherent light, though it is ineffective as a light source. Hydrogenated amorphous silicon is used in the production of low-cost, large-area electronics in applications such as LCDs, and of large-area, low-cost thin-film solar cells.

Silicon metal of the aluminium alloy applications
Alloying agent (hardener) in iron and aluminum, the production of silicones, an addition to ceramics, welding rods, powder metallurgy, pyrotechnics, ammunition, ordnance, refractories, electronic substrates, cement, vapor deposition, plasma spray, chemical formulations, and grinding wheels

DX works with the aluminium industry to implement more effective alloying practices. We combine a continuously improved product range with new technology, aiming at fast solubility and high silicon recovery. In aluminium alloys, silicon increases quality, toughness and casting properties.

Silicon metal of the silicone producers applications

The silicone industry is a major part of DX sales of silicon. We have cooperated closely with our European and American customers through several years to develop optimal products and the best logistics. we offer our customers a product with a stable quality and controlled amount of impurities. Our silicon is mainly sold on long-term contracts.

In the chemical industry, silicon is the basic raw material for producing silicone, a synthetic polymer (a string of long molecular chains) with special and varying properties. Silicones have stable thermal properties, are resistant to decomposition and chemicals, and are biologically adaptable.

Silicones are used in a variety of applications such as lubricants, sealing compounds, cosmetics, textiles, paint, cosmetics, electrical insulation materials for medical equipment, chips for use in electronic equipment, computers and car parts.

In the chemical segment, silicon metal is also used for the production of fumed silica. Final products include plastic articles, such as rubber and tyres, and segments based on silicones.

Silicon metal of the chemical structure

silicon is purified by converting it to a silicon compound that can be more easily purified than in its original state, and then converting that silicon element back into pure silicon. Trichlorosilane is the silicon compound most commonly used as the intermediate, although silicon tetrachloride and silane are also used. When these gases are blown over silicon at high temperature, they decompose to high-purity silicon.

At one time, DuPont produced ultra-pure silicon by reacting silicon tetrachloride with high-purity zinc vapors at 950 °C , producing silicon according to the chemical equation

SiCl4 + 2 Zn ---> Si + 2 ZnCl2.

However, this technique was plagued with practical problems (such as the zinc chloride byproduct solidifying and clogging lines) and was eventually abandoned in favor of the Siemens process.

A polycrystalline silicon rod made by the Siemens processIn the Siemens process, high-purity silicon rods are exposed to trichlorosilane at 1150 °C . The trichlorosilane gas decomposes and deposits additional silicon onto the rods, enlarging them according to chemical reactions like

2 HSiCl3 ---> Si + 2 HCl + SiCl4.

Silicon produced from this and similar processes is called polycrystalline silicon. Polycrystalline silicon typically has impurity levels of less than 10-9.

In 2006 REC announced construction of a plant based on fluidized bed technology using silane.

3SiCl4 + Si + 2H2 ---> 4HSiCl3

4HSiCl3 ---> 3SiCl4 + SiH4