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. Physical and chemical homes:
one.one Elementary symbol: B
1.two Atomic bodyweight: 10.81(on 1979 worldwide atomic bodyweight)
1.three Melting point: 2300 plusmn2 ordmC
1.four Sublimation temperature: 2550 ordmC
1.five Certain gravity: two.34-two.37
one.six Solubility: Insoluble in drinking water, ethanol, ethyl ether and hydrochloric acid, but dissolved in chilly concentrated standard answer 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.
one.7 Properties:
Boron is among metallic series with nonmetal sequence on the periodic desk of elements. As its robust electronegative, little atomic radius, and centralized nuclear cost, the chemical homes of it are reactive. It is steady in standard temperature, but it is oXiHu (West Lake) Dis.dized when heated to three hundred ordmC and burned if heated to seven hundred ordmC. It is tasteless and odorless.
Its nonmetal residence is related to silicon. In high temperature, boron can respond with oxygen, nitrogen, sulfur, halogen or carbon, and many others. It can be mixed directly with several kinds of metals to kind boride. In addition, boron can be also reacted with organic compounds to synthesize some compounds, in which boron is straight joined to carbon, or oxygen eXiHu (West Lake) Dis.sts amongst boron and carbon.
two. Technological indexes:
|
Product |
1st quality |
twond grade |
3rd grade |
|
Complete Boron(B) articles,% |
ge95. |
ge92 |
ge90 |
|
H2o soluble Boron(B) articles % |
le0.sixty |
le0.80 |
le1.00 |
|
pH benefit |
six.-eight. |
6.-eight. |
six.-8. |
|
Dampness content material, % |
le1.00 |
le1.00 |
le1.00 |
|
HtwoOtwo insoluble, % |
le0.70 |
le0.70 |
le1.50 |
|
Physical appearance |
Pale brown or brown-black powder |
||
3. Application: Boron has been utilized primarily in metallurgy, electronics, medicine, ceramics, nuke sector and chemical market and so forth, and it has been utilized in the kind of compound or as a additive in alloys. It can be used in smelting of some EPT alloy steels and as the fuel scavenger for the melting steel, in the ignitor of igniton in the electrical market, in the manage rod of atomic reactor, and as the large-vitality fuels for rocket. It has been as an EPTant material for production high-purity of halogenated boron and a raw substance for a assortment of borides. A good deal of rare noble metals can be substituted and saved by it. Boron and its compounds can be also employed as the catalyst of some organic and natural chemical reactions, etc.
four. EPT guidelines: ToXiHu (West Lake) Dis.c by ingestion and inhalation. The central nervous system is motivated by ingestion, gastrointestinal tract is stimulated by inhalation and boron poisoning. Eyes bear sligEPT stimulation as well. Operation should be put in with rubber gloves, a respirator and eye security by putting on protective clothing.
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