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. Physical and chemical homes:
one.one Elementary symbol: B
one.2 Atomic fat: 10.eighty one(on 1979 worldwide atomic fat)
one.three Melting point: 2300 plusmn2 ordmC
one.4 Sublimation temperature: 2550 ordmC
one.five Distinct gravity: 2.34-two.37
1.6 Solubility: Insoluble in h2o, ethanol, ethyl ether and hydrochloric acid, but dissolved in cold concentrated simple solution and decomposed Htwo at the very same time. It can be oXiHu (West Lake) Dis.dized by concentrated sulfuric acid or nitric acid to boric acid.
one.seven Qualities:
Boron is among metal series with nonmetal collection on the periodic table of aspects. As its powerful electronegative, small atomic radius, and centralized nuclear charge, 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 home is related to silicon. In substantial temperature, boron can react with oxygen, nitrogen, sulfur, halogen or carbon, etc. It can be blended immediately with several sorts of metals to kind boride. Moreover, boron can be also reacted with organic and natural compounds to synthesize some compounds, in which boron is right joined to carbon, or oxygen eXiHu (West Lake) Dis.sts among boron and carbon.
2. Specialized indexes:
|
Merchandise |
1st grade |
twond grade |
3rd grade |
|
Total Boron(B) content,% |
ge95. |
ge92 |
ge90 |
|
Water soluble Boron(B) articles % |
le0.60 |
le0.eighty |
le1.00 |
|
pH benefit |
six.-8. |
6.-8. |
six.-8. |
|
Humidity articles, % |
le1.00 |
le1.00 |
le1.00 |
|
HtwoOtwo insoluble, % |
le0.70 |
le0.70 |
le1.fifty |
|
Physical appearance |
Pale brown or brown-black powder |
||
three. Application: Boron has been employed mostly in metallurgy, electronics, drugs, ceramics, nuke sector and chemical business etc, and it has been utilised 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 electric industry, in the control rod of atomic reactor, and as the substantial-strength fuels for rocket. It has been as an EPTant content for manufacturing high-purity of halogenated boron and a uncooked substance for a range of borides. A good deal of rare noble metals can be substituted and saved by it. Boron and its compounds can be also utilised as the catalyst of some organic and natural chemical reactions, and many others.
4. EPT guidelines: ToXiHu (West Lake) Dis.c by ingestion and inhalation. The central anxious system is influenced by ingestion, gastrointestinal tract is stimulated by inhalation and boron poisoning. Eyes bear sligEPT stimulation as well. Procedure have to be mounted with rubber gloves, a respirator and eye defense by wearing protecting clothing.
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