Amorphous Elemental Boron
Government stXiHu (West Lake) Dis.Hu (West Lake) Dis.rd: Q/YTY002-2011
English alias: Boron
CAS RN: 7440-forty two-8
1. Physical and chemical properties:
1.one Elementary image: B
1.two Atomic weight: ten.81(on 1979 global atomic bodyweight)
one.3 Melting point: 2300 plusmn2 ordmC
one.four Sublimation temperature: 2550 ordmC
1.5 Certain gravity: 2.34-two.37
1.six Solubility: Insoluble in drinking water, ethanol, ethyl ether and hydrochloric acid, but dissolved in chilly concentrated basic answer and decomposed H2 at the identical time. It can be oXiHu (West Lake) Dis.dized by concentrated sulfuric acid or nitric acid to boric acid.
1.seven Homes:
Boron is between metallic sequence with nonmetal series on the periodic desk of factors. As its sturdy electronegative, small atomic radius, and centralized nuclear cost, the chemical houses of it are reactive. It is secure in standard 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 property is equivalent to silicon. In substantial temperature, boron can react with oxygen, nitrogen, sulfur, halogen or carbon, and so forth. It can be mixed immediately with numerous sorts of metals to sort 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 between boron and carbon.
two. Specialized indexes:
|
Item |
onest grade |
twond quality |
3rd quality |
|
Whole Boron(B) content material,% |
ge95. |
ge92 |
ge90 |
|
Water soluble Boron(B) content % |
le0.60 |
le0.eighty |
le1.00 |
|
pH value |
6.-eight. |
six.-eight. |
six.-8. |
|
Moisture content, % |
le1.00 |
le1.00 |
le1.00 |
|
H2Otwo insoluble, % |
le0.70 |
le0.70 |
le1.50 |
|
Appearance |
Pale brown or brown-black powder |
||
3. Application: Boron has been utilised primarily in metallurgy, electronics, drugs, ceramics, nuke market and chemical industry and many others, and it has been employed in the type of compound or as a additive in alloys. It can be employed in smelting of some EPT alloy steels and as the gas scavenger for the melting metal, in the ignitor of igniton in the electrical market, in the control rod of atomic reactor, and as the higher-vitality fuels for rocket. It has been as an EPTant substance for producing substantial-purity of halogenated boron and a raw substance 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 utilized as the catalyst of some organic and natural chemical reactions, and many others.
four. EPT instructions: ToXiHu (West Lake) Dis.c by ingestion and inhalation. The central nervous method is affected by ingestion, gastrointestinal tract is stimulated by inhalation and boron poisoning. Eyes bear sligEPT stimulation as properly. Procedure need to be set up with rubber gloves, a respirator and eye safety by donning protective clothes.
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