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Silicon Nanoparticles Nano Si Powder CAS 7440-21-3

Item No.: Tr-Si nanoparticles
Silicon nanoparticles are with large surface area, high surface activity and low bulk density. It is a new generation of optoelectronic semiconductor materials, with a wide gap energy semiconductor.
Purity: 99%
Particle Size: 50nm, 80nm
Silicon Nanoparticles Properties

About Silicon Nanoparticles Nano Si Powder:

Silicon nanoparticles (SiNPs) are biologically compatible, metal-free quantum dots that exhibit size and surface tailorable photoluminescence. Silicon nanoparticles are composed of pure amorphous nanosilicon dioxide. The particle diameter is less than 5 nanometers, and the particle range is narrow. Nano silicon powder is a new generation of optoelectronic semiconductor materials with wide-gapen energy semiconductors and a high-power light source material.


Si nanoparticles are known for being absorbent and abrasive, whereas mesoporous silicon nanoparticles have important applications in drug delivery and nanomedicine. Silicon nanoparticles have attracted great attention recently because of their intriguing physical properties, active surface state, distinctive photoluminescence, and biocompatibility.


How is Silicon Nanoparticles Nano Si Powder produced?

Some methods used to synthesize silicon nanoparticles are reverse microemulsion, flame synthesis, and widely used sol-gel. In a reverse microemulsion, surfactant molecules dissolved in an organic solvent form spherical micelles. In the presence of water, the polar head groups organize themselves to form water-containing microcavities, usually called reverse micelles.


When synthesizing si nanoparticles, adding silicon alkoxide and catalyst to the medium containing reverse micelles can be carefully controlled to make the nanoparticles grow in the microcavity. The main disadvantages of the reverse micro emulsification method are the high cost and difficulty of removing the surfactant in the final product.


Besides, by reacting 1 kg of sulphuric acid 3M with 190 g of Olivine at 90°C in a stirred reactor, 65 g of nano-silicon is produced. The features of the silicon produced are a specific surface area of 100-500 m²/g, a mean particle size of 5-20 nm, and a specific surface area in micropores of 20- 200 m²/g.

Technical Parameter of Silicon Nanoparticles Nano Si Powder:
Product Name MF Purity Particle Size Crystal Form SSA Color
Silicon Nanoparticles Si 99% 30nm,50nm, 80nm,200nm Polycrystalline 22m2/g Ochre

Application of Silicon Nanoparticles Nano Si Powder:

1. Lithium battery anode material

Silicon nanoparticles made of nano Si powder is used in the anode material of rechargeable lithium battery, or the surface of nano silicon powder is coated with graphite as the anode material of rechargeable lithium battery, which improves the electric capacity of a rechargeable lithium battery by more than 10 Capacity and several charge and discharge cycles.

2. Nano-silicon semiconductor light-emitting materials

Silicon/silicon oxide nanostructures designed on a silicon substrate, which can achieve photoluminescence and forward or reverse bias in all major wavelength bands (including 1.54 and 1.62µm) from near-ultraviolet to near-infrared Low threshold voltage electroluminescence.

3. Aluminum castable

Adding Si powder can significantly reduce the creep rate of high-aluminum casting castings in high-temperature furnaces, prevent cracks and spalling of the furnace lining due to shrinkage and creep, and improve service life. 

4. Tire cord fabric compound

Adding silicon nanoparticles to the tire cord fabric compound can increase the 300% constant tensile stress of vulcanizate, tensile properties, and tear strength, reduce Mooney viscosity, and reinforce the compound.

5. Coatings

Adding silicon nanoparticles to the coating system can improve the coating's anti-aging, scrub resistance, and anti-staining properties and extend the service life of the coating.


Packing & Shipping of Silicon Nanoparticles Nano Si Powder:

We have many different kinds of packing, which depend on the silicon nanoparticles quantity.

Silicon nanoparticles packing: vacuum packing, 1kg/bag, 25kg/barrel, or as requested.

Silicon nanoparticles shipping: could be shipped out by sea, by air, or by express as soon as possible once payment is received.

Luoyang Tongrun Nano Technology Co. Ltd. (TRUNNANO) 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.
If you are looking for high-quality nano Si powder, please feel free to contact us and send an inquiry. 

Silicon Nanoparticles Properties

Other Names Silicon Nanopowder, silicon nanocrystals, silicon nano-particles,
nanosilicon, silicon nano-powder, nano-silicon
CAS No. 7440-21-3
Compound Formula Si
Molecular Weight 28.08
Appearance Yellow Brown Powder
Melting Point 2900 °C
Boiling Point N/A
Bulk Density 1414 g/cm3
Trun Density 2330 g/cm3
Solubility in H2O N/A
Poisson's Ratio 0.064-0.28
Vickers Hardness N/A
Thermal Expansion (25 °C) 2.6 µm·m-1·K-1
Young's Modulus 51-80 GPa

Silicon Nanoparticles Health & Safety Information

Signal Word Warning
Hazard Statements H228
Flash Point Not applicable
Hazard Codes F
Risk Codes 11
Safety Statements 16-33-36
RTECS Number VW0400000
Transport Information UN 1346 4.1/PG 3
WGK Germany 2
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