Silicon Powder
Silicon Powder (CAS 7440-21-3), 99% to 99.999%, micron and nano sizes, supplied wholesale by Zyntex. For lithium-ion anodes, silicone production, aluminum alloys, ceramics and electronic materials. CoA and SDS with every lot.
Description
Silicon Powder Product Overview
Silicon (Si) is a gray, metallic-looking semiconductor that melts at 1414°C. As a powder, it is available in metallurgical purity (about 99%) up to high-purity grades of 99.999%, and in particle sizes from tens of micrometers down to nanometers.
Battery developers add silicon or silicon oxide to graphite anodes because silicon can store about ten times more lithium per gram than graphite. Nano-sized and carbon-coated powders help manage the large volume change during charging. In the chemical industry, silicon powder reacts with methyl chloride in the direct process to make the methylchlorosilanes from which silicones are produced.
Metallurgical-grade powder serves as an alloying element for aluminum and as a raw material for refractories and ceramics such as Silicon nitride and Silicon Carbide. High-purity grades go into sputtering targets and electronic materials, often alongside Germanium Metal.
Key Applications of Silicon Powder
Main application areas:
🔋 Battery Anodes
High-capacity additive for lithium-ion anodes.
🧪 Silicones
Raw material for methylchlorosilanes in silicone production.
⚙️ Alloys
Alloying element for aluminum and other metals.
🏺 Ceramics
Raw material for silicon nitride and silicon carbide.
Silicon Powder Technical Specifications
| Parameter | Standard Value |
|---|---|
| Product Name | Silicon Powder |
| CAS Number | 7440-21-3 |
| EC Number | 231-130-8 |
| Atomic Weight | 28.09 g/mol |
| Purity Levels | 99% – 99.999% |
| Melting Point | 1,414 °C |
| Documents | CoA and SDS with every lot |
⚠️ Safety & Handling: Fine silicon powder is a flammable solid and can form explosive dust clouds; contact with strong alkalis releases flammable hydrogen. Avoid dust formation and ignition sources, ground equipment, and wear dust protection and eye protection. Store in tightly closed containers in a dry place, away from water, acids and alkalis. Always consult the Safety Data Sheet (SDS) for full classification and handling instructions.
Frequently Asked Questions
Which particle sizes do you supply?
Micron-sized powders and nano-silicon for battery research are available. Please specify particle size and purity when requesting a quote.
Why is silicon used in battery anodes?
Silicon stores far more lithium per gram than graphite, which raises cell energy density. It is usually blended with graphite to limit volume expansion.
How can I get a price and documents?
Prices depend on quantity, packaging and destination. Contact us with your required volume to receive a quotation together with the CoA and SDS.
