Silicon Si powder CAS 7440-21-3

Overview of Silicon Powder

Silicon Si Powder, also known as micro silicon powder or silica fume. It is a powdery material formed by collecting and processing the smoke and dust that escapes with the exhaust gas during the high-temperature melting of industrial silicon and ferrosilicon in an industrial electric furnace through a special capture device. The SiO ₂ content in this type of smoke and dust accounts for about 90% of the total smoke and dust, and its particle size is very small, with an average particle size of almost nanometer level.

Silicon powder is a kind of new environment-friendly inorganic non-metallic functional powder material, which is selected from natural fused crystalline quartz or fused silica as raw material after rough grinding, purification, wet/dry ball milling or airflow milling and further processing according to the liquid or aerodynamic fine classification process.

(Silicon Si powder CAS 7440-21-3)

Features of Silicon Powder 

Silicon Si Powder, also known as micro silicon powder or silica fume. It is a powdery material formed by collecting and processing the smoke and dust that escapes with the exhaust gas during the high-temperature melting of industrial silicon and ferrosilicon in an industrial electric furnace through a unique capture device. The SiO ₂ content in this type of smoke and dust accounts for about 90% of the total smoke and dust, and its particle size is tiny, with an average particle size of almost nanometer level.
Silicon powder is a new environmentally friendly inorganic non-metallic functional powder material. It is selected from natural fused crystalline quartz or fused silica as a raw material after rough grinding, purification, wet/dry ball milling or airflow milling and further processed according to the liquid or aerodynamic fine classification process.

Parameter table of Silicon Powder

Silicon Si powder Properties
Other Names	Silicon Si powder, Si, Si powder, nano silicon powder
CAS No.	7440-21-3
Compound Formula	Si
Molecular Weight	28.08 g/mol
Appearance	brown, or silvery
Melting Point	1414°C
Boiling Point	2900°C
Density	2330kg/cm3
Purity	>99.95%
Electrical Resistivity	3-4 microhm-cm @ 0 °C
Poisson’s Ratio	0.064 – 0.28
Specific Heat	0.168 Cal/g/K @ 25 °C
Thermal Conductivity	1.49 W/cm/K @ 298.2 K
Thermal Expansion	(25 °C) 2.6 µm·m-1·K-1
Young’s Modulus	51-80 GPa
Exact Mass	N/A
Monoisotopic Mass	N/A
Silicon Si powder Health & Safety Information
Safety Warning	Warning
Hazard Statements	H315-H319-H335
Hazard Codes	H228
Risk Codes	11
Safety Statements	16-33-36
RTECS Number	VW0400000
Transport Information	UN 1346 4.1/PG 3
WGK Germany	2

Applications of Silicon Powder

 Steel and Metallurgical Industry: Silicon powder is used as a deoxidizer and alloy additive in the steel and metallurgical industry. It can improve steel’s hardenability and mechanical properties. In addition, silicon powder is used to manufacture silicon steel sheets, which are essential materials for electrical equipment such as motors and transformers.

 Ceramic and refractory materials industry: Silicon powder can manufacture ceramics and refractory materials, such as silicon bricks and siliceous refractory mud. These materials have high-temperature stability, oxidation, and corrosion resistance. They are widely used in high-temperature equipment such as kilns and blast furnaces.

 Chemical industry: Silicon powder can be used as a raw material for organic silicon compounds, producing silicone oil, silicone rubber, silicone resin, etc. These organosilicon compounds are widely used in coatings, adhesives, sealants, surfactants, etc.

Applications Silicon Si Powder

 

Electronics industry: Silicon powder can manufacture semiconductor materials like single-crystal and polycrystalline silicon. These materials are the foundation of the electronic industry and are used in manufacturing integrated circuits, solar cells, and so on.

Construction industry: Silicon powder can be used as a concrete admixture to improve its strength and durability. It can also be used to manufacture building materials such as silicone waterproofing agents and sealants.

Other fields: Silicon powder can also be applied in casting, ceramics, coatings, paints, rubber, plastics, sealing materials, friction materials, medicine, food, environmental protection, aerospace, and other fields.

 Production Method of Silicon Powder

1. Basic Material Prep Work:Begin with high-purity metallurgical-grade silicon (MG-Si) or quartz sand (SiO₂) .
2. Decrease Refine:Lower quartz sand in an ** electrical arc heating system making use of carbon (e.g., coke or charcoal) to create metallurgical-grade silicon: SiO₂ + 2C → Si + 2CO.
3. Filtration:Fine-tune metallurgical-grade silicon to electronic-grade silicon (EG-Si) making use of procedures like chemical vapor deposition (CVD) or area refining .
4. Grinding and Milling:Crush and grind the silicon right into great bits utilizing round milling, jet milling, or mechanical grinding .
5. Category:Filter or categorize the powder to accomplish the wanted bit dimension circulation.
6. Surface Area Therapy (Optional):Layer or functionalize the silicon powder for certain applications (e.g., anti-oxidation layers ).
7. Product packaging:Shop the powder in closed containers to stop contamination and oxidation.

Company Profile

RBOSCHCO is a trusted global chemical material supplier & manufacturer with over 12-year-experience in providing super high-quality chemicals and nanomaterials, including boride powder, nitride powder, graphite powder, sulfide powder, 3D printing powder, etc.The company has a professional technical department and Quality Supervision Department, a well-equipped laboratory, and equipped with advanced testing equipment and after-sales customer service center.If you are looking for high-quality Silicon Si Powder, please feel free to contact us or click on the needed products to send an inquiry. 

Storage Condition of Silicon Powder

1) Store in a dry environment at room temperature.

2) Avoid damp and high temperature.

3) Use immediately after opening the inner packing bag.

Payment of Silicon Powder

L/C, T/T, Western Union, Paypal, Credit Card etc.

Package and shipment of Silicon Powder

By sea, by air, by express, as customers request.

 

5 FAQs of  Silicon Powder

Q1

What are the main uses of silicon powder?

Answer: The main uses of silicon powder include as a deoxidizer and alloy additive in the steel and metallurgical industries, raw materials for ceramics and refractory materials, organic silicon compound raw materials in the chemical industry, semiconductor materials in the electronic industry, and concrete admixtures in the construction industry.

Q2

In what fields can silicon powder be used as a semiconductor material?

Answer: Silicon powder can be used as a semiconductor material in the electronics industry, especially in manufacturing integrated circuits and solar cells. Pure monocrystalline silicon is the key material for manufacturing these devices.

Q3

Is silicon powder harmful to human health?

Answer: Silicon powder is not directly toxic to the human body, but it is important to avoid prolonged inhalation or contact when handling silicon powder. Long-term exposure to a silica dust environment may lead to silicosis, an occupational disease similar to pneumoconiosis. Therefore, appropriate protective measures should be taken when handling silicon powder.

Q4

Is silicon powder flammable and explosive?

Answer: Silicon powder may have flammable and explosive properties under certain conditions. Especially when silicon powder mixes with air to form a certain dust cloud concentration, it may cause an explosion when encountering a fire source or high temperature. Therefore, when handling silicon powder, it should be ensured to operate in a well-ventilated environment and away from ignition sources and static sparks.

Q5

How to store silicon powder to ensure its quality?

Answer: To ensure the quality of silicon powder, it should be stored in a dry and ventilated place, away from ignition sources and flammable materials. The storage container should be well sealed to prevent the reaction between silicon powder and moisture in the air. In addition, prolonged exposure to high temperatures or humid environments should be avoided to avoid affecting its performance.