Silicon Evaporation Material - Si

Purity---
99.999％

Shape---
Irregular pieces, pellet, solid substance,Black granulars or lumps.

Dimension---
3-8mm irregular pieces (or custom-made)

Property---
Solubility---Insoluble in water and soluble in mixture of HF and HNO3.
Melting point ---1410 ℃, Density--- 2.33 g/cm3
Boiling point ---2480 ℃, Vapour pressure at 1343 ℃ 1 Pa,at 1585℃ 10 Pa
Expand coefficient--- 2.33× 10-6
Specific heat capacity--- 0.181 Cal/gK
Thermal conductitivity---0.373 Cal/K.cm.S
Hardness--- acc. to Knoop 1150±110 Kg/mm2,acc.to Mohs 7
Properties of thin film
        Transmission range ～ 1100～20000nm
        Refractive index at 1500nm 3.48,at 2000nm 3.46,at 5000nm 3.42,at10000nm 3.42
Hints on evaporation---
        Evaporation in ZrO2 or C crucible with electron beam gun.
        Evaporation temperature～ 1500 ℃
        Substrate temperature～ 300 ℃

Application---
Anti-reflection coatings, interference filters, jewel, solar cell etc

Silicon is the most abundant electropositive element in The Earth’s crust. It’s a metalloid with a marked metallic luster and very brittle. It is usually tetravalent in its compounds, although sometimes its bivalent, and it’s purely electropositive in its chemical behaviour. Moreover, pentacoordinated and hexacoordinated silicon compounds are also known.It’s almost as electropositive as tin and much more positive than germanium or lead. According to this metallic character, it forms tetrapositive ions and various covalent compounds; it appears as a negative ion only in a few silicides and as a positive constituent of oxyacids or complex anions. It forms various series of hydrides, various halides (many of which contain silicon-silicon bounds) and many series of compounds which contain oxygen, which can have ionic or covalent properties.

Basic Infomation

Name: Silicon

Symbol: Si

Atomic Number: 14

Atomic Mass: 28.0855 amu

Melting Point: 1410.0 °C (1683.15 °K, 2570.0 °F)

Boiling Point: 2355.0 °C (2628.15 °K, 4271.0 °F)

Number of Protons/Electrons: 14

Number of Neutrons: 14

Classification: Metalloid

Crystal Structure: Cubic

Density @ 293 K: 2.329 g/cm3

Color: grey