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9712HK Si Nanopowder/ Si Nanoparticles, 99%, 100nm

9714HK Si, Monocrystalline, 99%, ~1um

9715DX Si Nanoparticles/ Si Nanopowder, 99.9%, 500nm

9717HK Si Nanoparticles/ Si Nanopowder, 99%, 30nm

9717DX Si Nanopowder/ Si Nanoparticles, 99%, 50nm

9718DX Si Powder, 99.999%, -325mesh

9719DX Si Powder, 99.9+%, -200/+325 mesh

9720DG Si, Polycrystalline, 99.99995%, lumps

6807NM SiO2 nanopowder / nanopowder, 99.5%, 15-20nm, porous

6808NM SiO2 nanopowder / nanopowder 99.5%, 20nm, non-porous

6810DL SiO2 nanopowder / nanopowder 99.9%, 20-60nm 

6811DL SiO2 nanoparticle/ nanopowder (SiO2, 99%, 10-30nm, treated with Silane Coupling Agents)

6816DX SiO2 nanopowder /nanoparticles, 99.9%, 500nm

6851HN SiO2, Nanopowder / nanoparticles, 10-20nm, modified with amino group, dispersible

6852HN SiO2 nanopowder / nanoparticles, 10-20nm, modified with epoxy group, dispersible

6853HN SiO2 nanopowder/ nanoparticles, 10-20nm, modified with double bond, dispersible

6861HN SiO2 nanopowder/ nanoparticles 10-20nm, surface modified with double layer, dispersible

6862HN SiO2 nanopowder/ nanoparticles 10-20nm, surface modified, super-hydrophobic & oleophilic, dispersible

6863HN SiO2, nanopowder/ nanoparticles 99.8%, 5-15nm, surface modified, hydrophobic & oleophilic,  dispersible

6864HN SiO2 nanopowder/ nanoparticles, 99.8%, 10-25nm, surface modified, super-hydrophobic, dispersible

6820HK SiC nanopowder/ nanoparticles, beta, 99%, 40nm

6880XH SiC nanopowder/ nanoparticles, beta, whisker, 99+%

6830HK Si3N4 nanopowder/ nanoparticles, amorphous, 99%, 20nm

6835HM Si3N4 alpha nanopowder/ nanoparticles 99.5%, 0.5-1.0um

6835HK Si3N4 alpha, 97.5-99%, fiber, 100nmX800nm



Si - Silicon

Si - Silicon

Atomic Number: 14              Period Number: 3                  Group Number: 14

Silicon is a gray and hard semi-metal with very high melting and boiling points. It is the second abundant element in the crust. Most of silicon is always found in silicate minerals and some of them found as silicon oxide. There are three isotopes of silicon in nature: 28Si, 29Si, 30Si and the most abundant one is 28Si, which occupies 92%.



Two allotropes of silicon exist at room temperature: amorphous and crystalline. Amorphous appears as a brown powder while crystalline silicon has a metallic luster and a grayish color. Single crystals of crystalline silicon can be grown with a process known as the Czochralski process. They are used to manufacture of solid-state electronic devices, such as transistors, solar cells, rectifiers and microchips.



Silicon represents one of those elements that has a half full set of electron orbitals for its electrons. This makes its bonding choices in chemical compounds diverse and means that those products are also as diverse. As a dioxide it is called sand. When used as the basis of a semiconductor and infused with another element, it can show opposite electrical properties. It forms compounds with excellent lubrications properties and is sold as such as well.



There are other useful silicon compounds. Silicon carbide (SiC) is nearly as hard as diamond and is used as an abrasive. Sodium silicate (Na2SiO3), also known as water glass, is used in the production of soaps, adhesives and as an egg preservative. Silicon tetrachloride (SiCl4) is used to create smoke screens.



Physical and Chemical properties:

Atomic Weight: 28.0855

Melting Point: 1687 K

Boiling Point: 3538 K

Density: 2.3296 g/cm3

Phase at Room Temperature: Solid

Ionization Energy: 8.152 eV

Oxidation States: +4, +2, -4




See also:

Wikipedia - Basics on Silicon

WebElements - The basic elements of Silicon

Jefferson Lab - Learning about Silicon



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