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, 100nm
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 nano silicon 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 gap energy semiconductors and is also a high-power light source material.
Silicon 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 in the past decades 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 and 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 silicon nanoparticles, the addition of 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 in 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% 50nm, 100nm 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 a number of 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, tear strength, reduce Mooney viscosity, and have a certain reinforcing effect on the compound.
Adding silicon nanoparticles to the coating system can improve the anti-aging, scrub resistance, and anti-staining properties of the coating, and finally extend the service life of the coating.

Packing & Shipping of Silicon Nanoparticles Nano Si Powder:
We have many different kinds of packing which depends on the silicon nanoparticles quantity.
Silicon nanoparticles nano Si powder packing: vacuum packing, 1kg/bag, 25kg/barrel, or as your request.
Silicon nanoparticles nano Si powder shipping: could be shipped out by sea , by air, by express as soon as possible once payment receipt.


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
Calcium Nitride | Nitride Powder | Boride Powder | 3D Printing Powder | Carbide Powder | Oxide Powder | Silicide Powder