Amorphous Elemental Boron
Government stXiHu (West Lake) Dis.Hu (West Lake) Dis.rd: Q/YTY002-2011
English alias: Boron
CAS RN: 7440-42-eight
1. Actual physical and chemical properties:
1.1 Elementary image: B
one.two Atomic weight: ten.eighty one(on 1979 intercontinental atomic excess weight)
one.3 Melting level: 2300 plusmn2 ordmC
one.4 Sublimation temperature: 2550 ordmC
one.five Particular gravity: 2.34-2.37
1.6 Solubility: Insoluble in drinking water, ethanol, ethyl ether and hydrochloric acid, but dissolved in chilly concentrated standard remedy and decomposed Htwo at the same time. It can be oXiHu (West Lake) Dis.dized by concentrated sulfuric acid or nitric acid to boric acid.
one.7 Properties:
Boron is amongst steel sequence with nonmetal collection on the periodic desk of factors. As its sturdy electronegative, small atomic radius, and centralized nuclear charge, the chemical qualities of it are reactive. It is steady in typical temperature, but it is oXiHu (West Lake) Dis.dized when heated to 300 ordmC and burned if heated to seven hundred ordmC. It is tasteless and odorless.
Its nonmetal house is similar to silicon. In large temperature, boron can react with oxygen, nitrogen, sulfur, halogen or carbon, etc. It can be mixed directly with numerous sorts of metals to form boride. Moreover, boron can be also reacted with organic and natural compounds to synthesize some compounds, in which boron is immediately joined to carbon, or oxygen eXiHu (West Lake) Dis.sts among boron and carbon.
two. Specialized indexes:
|
Item |
onest quality |
twond quality |
3rd quality |
|
Overall Boron(B) content material,% |
ge95. |
ge92 |
ge90 |
|
Drinking water soluble Boron(B) content material % |
le0.60 |
le0.80 |
le1.00 |
|
pH value |
6.-8. |
six.-eight. |
6.-eight. |
|
Humidity content material, % |
le1.00 |
le1.00 |
le1.00 |
|
H2Otwo insoluble, % |
le0.70 |
le0.70 |
le1.50 |
|
Look |
Pale brown or brown-black powder |
||
three. Software: Boron has been utilized primarily in metallurgy, electronics, medicine, ceramics, nuke business and chemical business etc, and it has been utilized in the kind of compound or as a additive in alloys. It can be utilized in smelting of some EPT alloy steels and as the gas scavenger for the melting steel, in the ignitor of igniton in the electric market, in the manage rod of atomic reactor, and as the high-energy fuels for rocket. It has been as an EPTant material for production substantial-purity of halogenated boron and a uncooked materials for a range of borides. A great deal of rare noble metals can be substituted and saved by it. Boron and its compounds can be also utilized as the catalyst of some organic chemical reactions, and many others.
4. EPT instructions: ToXiHu (West Lake) Dis.c by ingestion and inhalation. The central nervous system is affected by ingestion, gastrointestinal tract is stimulated by inhalation and boron poisoning. Eyes bear sligEPT stimulation as well. Operation need to be mounted with rubber gloves, a respirator and eye defense by donning protective garments.
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