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Silicon Metal for Steelmaking/Refractory/Power Metallurgy Industry
Product Description
| Grade | Si | Fe | Al | Ca |
| 553 | 0.985 | 0.005 | 0.005 | 0.003 |
| 441 | 0.99 | 0.004 | 0.004 | 0.001 |
| 4502 | 0.99 | 0.004 | 0.005 | 0.0002 |
| 421 | 0.99 | 0.004 | 0.002 | 0.001 |
| 411 | 0.99 | 0.004 | 0.001 | 0.001 |
| 3303 | 0.99 | 0.003 | 0.003 | 0.0003 |
| 2202 | 0.99 | 0.002 | 0.002 | 0.0002 |
| 2202 | 0.99 | 0.002 | 0.002 | 0.0002 |
| 1101 | 0.99 | 0.001 | 0.001 | 0.0001 |
Silicon metal is a grey and shiny semiconductor metal, also known as crystalline silicon or industrial silicon, and is mainly used as an additive for non-ferrous alloys. Silicon metal is produced from quartz and coke in an electric furnace, and the content of the silicon element is about 98% (in recent years, with a content of 99.99%, Si is also called silicon metal), and the other impurities are mainly iron, aluminium, calcium, and so on. The classification of metallic silicon is according to the content of iron, aluminium, and calcium; silicon metal can be divided into different grades such as 553, 441, 411, 3303, 2202, and 1101.
Silicon metal is silver gray or dark gray powder with metallic luster, which be of high melting point, good heat resistance, high resistivity and superior oxidation resistance, it's called "industrial glutamate", which is an essential basic raw material in hi-tech industry.
There are two types of silicon metal: through oxygen and without oxygen.
First, the difference between surface oxidation.
Silicon metal is a chemical element, usually in the form of polysilicon. Its appearance is mainly gray, silver-white, smooth surface. When the metal silicon is exposed in the air for a long time, the surface will appear different degrees of oxidation, resulting in a layer of gray and black oxide, and its thickness and density increase with the extension of exposure time. Therefore, the appearance difference between metal silicon through oxygen and oxygen is mainly due to whether the surface oxidation is obvious.
Second, the difference in color change.
The color change of metallic silicon through oxygen and through oxygen is also an important sign to distinguish them. In the case of no oxygen, the surface of metal silicon is gray and silver white, and there is no color change. In the case of oxygen, as the surface begins to produce oxidation, the color of metal silicon will gradually darken, becoming dark gray or black. This is caused by the continuous thickening of the oxide layer on the surface, and it also has a certain corrosion resistance.
Three, the difference between the use of occasions.
The difference between metal silicon through oxygen and oxygen is also reflected in their use. In general, metal silicon through oxygen is more suitable for the production of electronic components, semiconductor devices, solar cells, solar photovoltaic cells and thermocouples and other materials requiring high purity. Silicon metal without oxygen is more suitable for metal pigments, ceramics, glass and other production processes, can effectively improve the weight ratio and mechanical strength.
Application
Metallurgical silicon is used as an alloying agent in aluminum casting and resultant aluminum-silicon (Al-Si) is used to make light in wight and strong car components that are better than components cast from pure aluminum. Chemical industry uses metallurgical silicon in making fumed silica, silanes and silicone.
Polysilicon of photovoltaic grade is used in polysilicon solar cells production. Monocrystal silicon on the other hand is used as a semiconductor material in modern electronics. It is used along with other material to produce LEDs, integrated circuits and FETs.
Company Profile
Tianjin Eastmate Carbon Co.,Ltd is located in Tianjin City, which is specialized in exporting varieties of cokes in China , including Graphite Electrode , petroleum coke, calcined coke, graphite petroleum coke,graphite electrode,artificial graphite anode material，silicon metal and so on. We stick to the "quality first" to guarantee the goods with the competitive price in different specifications, at the same time. We can also ensure the quantity you required because of our huge coke plants. Surely,we have our own specialized logistics team to reduce the cost at the maximum. With the strong technological team, we can always provide the reliable service to make your purchasing be much more easier. We can provide solutions to any industry where energy is of essence and cost optimization is possible.
Our company has five major production bases, including Lanzhou in Gansu, Linyi in Shandong, Binhai in Tianjin, Ulanqab in Inner Mongolia, and Binzhou in Shandong. The annual output is 200,000 tons of calcined coke, 150,000 tons of graphitized carburizer, 20,000 tons of silicon carbide,80,000 of artificial graphite anode material, 80,000 carbon & graphite electrode, 100,000 of silicon metal, and other carbon products including carbon electrode paste,graphite crucible, etc.
FAQ
1. Your specification is not very suitable for us.
Please offer us specific indicators by TM or email. we will give you feedback as soon as possible.
2.When can i get the price?
We usually quote within 24 hours after getting your detailed requirements, like size, quantity etc.
If it is an urgent order, you can call us directly.
3. Do you provide samples?
Yes, samples are available for you to check our quality.
Samples delivery time will be about 3-10 days.
4. What about the lead time for mass product?
The lead time is based on the quantity,about 7-15 days. For graphite product, apply dual-use items license need about 15-20 working days.