Amorphous Elemental Boron
Govt 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 houses:
1.one Elementary symbol: B
1.two Atomic excess weight: ten.eighty one(on 1979 international atomic fat)
1.3 Melting point: 2300 plusmn2 ordmC
1.four Sublimation temperature: 2550 ordmC
1.5 Distinct gravity: two.34-2.37
one.6 Solubility: Insoluble in water, ethanol, ethyl ether and hydrochloric acid, but dissolved in chilly concentrated fundamental resolution and decomposed H2 at the very same time. It can be oXiHu (West Lake) Dis.dized by concentrated sulfuric acid or nitric acid to boric acid.
1.seven Homes:
Boron is in between metal series with nonmetal collection on the periodic desk of components. As its robust electronegative, little atomic radius, and centralized nuclear charge, the chemical houses of it are reactive. It is stable in regular temperature, but it is oXiHu (West Lake) Dis.dized when heated to 300 ordmC and burned if heated to 700 ordmC. It is tasteless and odorless.
Its nonmetal home is similar to silicon. In high temperature, boron can respond with oxygen, nitrogen, sulfur, halogen or carbon, and so on. It can be merged immediately with many kinds of metals to form boride. Furthermore, boron can be also reacted with natural and organic compounds to synthesize some compounds, in which boron is straight joined to carbon, or oxygen eXiHu (West Lake) Dis.sts between boron and carbon.
two. Technological indexes:
|
Item |
onest quality |
twond quality |
threerd quality |
|
Complete Boron(B) material,% |
ge95. |
ge92 |
ge90 |
|
H2o soluble Boron(B) material % |
le0.sixty |
le0.80 |
le1.00 |
|
pH value |
six.-8. |
six.-8. |
6.-eight. |
|
Moisture content material, % |
le1.00 |
le1.00 |
le1.00 |
|
H2O2 insoluble, % |
le0.70 |
le0.70 |
le1.50 |
|
Physical appearance |
Pale brown or brown-black powder |
||
three. Software: Boron has been employed primarily in metallurgy, electronics, drugs, ceramics, nuke sector and chemical industry and so on, and it has been employed in the type of compound or as a additive in alloys. It can be used in smelting of some EPT alloy steels and as the gas scavenger for the melting steel, in the ignitor of igniton in the electric powered market, in the manage rod of atomic reactor, and as the large-energy fuels for rocket. It has been as an EPTant substance for producing higher-purity of halogenated boron and a uncooked content for a assortment of borides. A great deal of unusual noble metals can be substituted and saved by it. Boron and its compounds can be also utilised as the catalyst of some natural and organic chemical reactions, etc.
4. EPT guidelines: ToXiHu (West Lake) Dis.c by ingestion and inhalation. The central anxious program is influenced by ingestion, gastrointestinal tract is stimulated by inhalation and boron poisoning. Eyes bear sligEPT stimulation as effectively. Procedure should be set up with rubber gloves, a respirator and eye security by putting on protecting clothes.
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