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DIAMOND

DIAMOND Struktur
CAS-Nr.
Englisch Name:
DIAMOND
Synonyma:
DIAMOND;Diamond powder, Natural;Diamond powder, Synthetic;Diamond powder, synthetic, <1 micron, 99.9% (metals basis);Diamond powder, natural, 40-60 micron, 99.9% (metals basis);Diamond powder, synthetic, 40-60 micron, 99.9% (metals basis)
CBNumber:
CB8686455
Summenformel:
Molgewicht:
0
MOL-Datei:
Mol file

DIAMOND Eigenschaften

Dichte
3.5 g/mL at 25 °C(lit.)
Aggregatzustand
synthetic polycrystalline powder
Farbe
Clear, Impurities (i.e. Nitrogen) and irradiation can change color to yellow, green, blue, pink, or brown.
Crystal Structure
Cubic, Diamond - Space Group Fd3m
Merck 
14,2987
Dielectric constant
5.5(Ambient)
Modulus of Elasticity
800 - 925 GPa
Poissons Ratio
0.20
Knoop Microhardness
54 - 84, in GPa
Shear Modulus
333 - 385 GPa, Calculated
Vickers Microhardness
88 - 108, GPa; Type 1b
95 - 131
108 - 145, GPa; Type 11a

Sicherheit

WGK Germany  -
RTECS-Nr. HL4158550

DIAMOND Chemische Eigenschaften,Einsatz,Produktion Methoden

Physikalische Eigenschaften

The space lattice of a diamond belongs to the cubic system, and its diamond structure has a lattice constant of a=0.3560 nm and a cleavage plane of 111.
Diamond is classified optically as Type I and Type II. Type I shows the absorption bands at 8 and 20.8 mm by the impurities other than the 5 mm absorption band. On the other hand, Type II shows the 5 mm absorption band only. The transmittance of Type II is T=60% for wavelengths longer than 6 mm. There is no other material that shows such an optical property.

Definition

An allotrope of CARBON. It is the hardest naturally occurring substance and is used for jewelry and, industrially, for cutting and drilling equipment. Each carbon atom is surrounded by four equally spaced carbon atoms arranged tetrahedrally. The carbon atoms form a three-dimensional network with each carbon–carbon bond equal to 0.154 nm and at an angle of 109.5° with its neighbors. In diamonds millions of atoms are covalently bonded to form a giant molecular structure, the great strength of which results from the strong covalent bonds. Diamonds can be formed synthetically from graphite in the presence of a catalyst and under extreme temperature and pressure; although small, such diamonds are of adequate size for many industrial uses.

Industrielle Verwendung

Diamond is the cubic crystalline form of carbon.When pure, diamond is water clear, butimpurities add shades of opaqueness including black. It is the hardest natural material with ahardness on the Knoop scale ranging from 5500to 7000. It will scratch and be scratched by thehardest anthropogenic material Borozon. It hasa specific gravity of 3.5. Diamond has a meltingpoint of around 3871°C, at which point it willgraphitize and then vaporize. Diamonds aregenerally electrical insulators and nonmagnetic.Synthetic diamonds are produced from graphiteat extremely high pressures (5444 to 12,359.9MPa) and temperatures from 1204 to 2427°C.They are up to 0.01 carat in size and are comparableto the quality of industrial diamonds.In powder form they are used in cutting wheels.Of all diamonds mined, about 80% by weightare used in industry. Roughly 45% of the totalindustrial use is in grinding wheels. Tests haveshown that under many conditions syntheticdiamonds are better than mined diamonds inthis application.

DIAMOND Upstream-Materialien And Downstream Produkte

Upstream-Materialien

Downstream Produkte


DIAMOND Anbieter Lieferant Produzent Hersteller Vertrieb H?ndler.

Global( 6)Lieferanten
Firmenname Telefon E-Mail Land Produktkatalog Edge Rate
Alfa Aesar 400-6106006
saleschina@alfa-asia.com China 30123 84

()Verwandte Suche:


  • DIAMOND
  • Diamond powder, synthetic, 40-60 micron, 99.9% (metals basis)
  • Diamond powder, natural, 40-60 micron, 99.9% (metals basis)
  • Diamond powder, synthetic, <1 micron, 99.9% (metals basis)
  • Diamond powder, Natural
  • Diamond powder, Synthetic
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