Amorphous Elemental Boron
Executive stXiHu (West Lake) Dis.Hu (West Lake) Dis.rd: Q/YTY002-2011
English alias: Boron
CAS RN: 7440-forty two-eight
one. Physical and chemical houses:
one.one Elementary image: B
1.2 Atomic excess weight: ten.81(on 1979 worldwide atomic weight)
1.three Melting stage: 2300 plusmn2 ordmC
1.4 Sublimation temperature: 2550 ordmC
1.5 Certain gravity: 2.34-two.37
1.6 Solubility: Insoluble in water, ethanol, ethyl ether and hydrochloric acid, but dissolved in chilly concentrated simple resolution 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.
1.7 Homes:
Boron is amongst metal series with nonmetal series on the periodic desk of elements. As its strong electronegative, small atomic radius, and centralized nuclear cost, the chemical houses of it are reactive. It is secure 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 equivalent to silicon. In substantial temperature, boron can react with oxygen, nitrogen, sulfur, halogen or carbon, and so forth. It can be blended straight with several types of metals to form boride. Moreover, 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. Technological indexes:
|
Merchandise |
1st quality |
2nd quality |
threerd quality |
|
Whole Boron(B) content,% |
ge95. |
ge92 |
ge90 |
|
Drinking water soluble Boron(B) material % |
le0.sixty |
le0.80 |
le1.00 |
|
pH price |
six.-8. |
6.-8. |
6.-eight. |
|
Humidity material, % |
le1.00 |
le1.00 |
le1.00 |
|
HtwoOtwo insoluble, % |
le0.70 |
le0.70 |
le1.50 |
|
Look |
Pale brown or brown-black powder |
||
3. Application: Boron has been utilized primarily in metallurgy, electronics, medicine, ceramics, nuke market and chemical market and many others, and it has been utilised in the sort 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 metal, in the ignitor of igniton in the electric sector, in the manage rod of atomic reactor, and as the high-energy fuels for rocket. It has been as an EPTant material for producing large-purity of halogenated boron and a uncooked material for a selection of borides. A lot of rare noble metals can be substituted and saved by it. Boron and its compounds can be also employed as the catalyst of some natural and organic chemical reactions, and so on.
4. EPT recommendations: ToXiHu (West Lake) Dis.c by ingestion and inhalation. The central anxious system is affected by ingestion, gastrointestinal tract is stimulated by inhalation and boron poisoning. Eyes bear sligEPT stimulation as effectively. Procedure need to be mounted with rubber gloves, a respirator and eye defense by wearing protective clothing.
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