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 qualities:
1.1 Elementary image: B
one.two Atomic weight: ten.eighty one(on 1979 worldwide atomic excess weight)
1.3 Melting level: 2300 plusmn2 ordmC
1.4 Sublimation temperature: 2550 ordmC
1.five Distinct gravity: 2.34-two.37
1.six Solubility: Insoluble in h2o, ethanol, ethyl ether and hydrochloric acid, but dissolved in chilly concentrated simple remedy and decomposed Htwo at the exact 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 metallic series with nonmetal sequence on the periodic table of factors. As its strong electronegative, small atomic radius, and centralized nuclear cost, the chemical homes of it are reactive. It is stable in normal 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 high temperature, boron can respond with oxygen, nitrogen, sulfur, halogen or carbon, and so forth. It can be blended directly with a lot of kinds of metals to kind boride. In addition, boron can be also reacted with natural and organic compounds to synthesize some compounds, in which boron is right joined to carbon, or oxygen eXiHu (West Lake) Dis.sts amongst boron and carbon.
two. Complex indexes:
|
Product |
1st grade |
2nd grade |
3rd quality |
|
Complete Boron(B) content,% |
ge95. |
ge92 |
ge90 |
|
Drinking water soluble Boron(B) content material % |
le0.60 |
le0.eighty |
le1.00 |
|
pH price |
six.-8. |
six.-eight. |
6.-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. Software: Boron has been employed largely in metallurgy, electronics, drugs, ceramics, nuke market and chemical industry and many others, and it has been utilised in the form of compound or as a additive in alloys. It can be employed in smelting of some EPT alloy steels and as the fuel scavenger for the melting metal, in the ignitor of igniton in the electrical business, in the control rod of atomic reactor, and as the high-power fuels for rocket. It has been as an EPTant substance for manufacturing large-purity of halogenated boron and a raw content for a range of borides. A good deal of exceptional noble metals can be substituted and saved by it. Boron and its compounds can be also utilized as the catalyst of some natural chemical reactions, and so forth.
4. EPT recommendations: ToXiHu (West Lake) Dis.c by ingestion and inhalation. The central nervous program is influenced by ingestion, gastrointestinal tract is stimulated by inhalation and boron poisoning. Eyes bear sligEPT stimulation as well. Operation have to be mounted with rubber gloves, a respirator and eye security by wearing protective clothing.
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