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 homes:
one.1 Elementary image: B
one.2 Atomic weight: ten.81(on 1979 worldwide atomic fat)
1.three Melting level: 2300 plusmn2 ordmC
one.4 Sublimation temperature: 2550 ordmC
1.five Certain gravity: two.34-two.37
one.six Solubility: Insoluble in h2o, ethanol, ethyl ether and hydrochloric acid, but dissolved in chilly concentrated standard resolution and decomposed Htwo at the same time. It can be oXiHu (West Lake) Dis.dized by concentrated sulfuric acid or nitric acid to boric acid.
1.seven Homes:
Boron is amongst metallic sequence with nonmetal sequence on the periodic table of aspects. As its powerful electronegative, modest atomic radius, and centralized nuclear cost, the chemical properties of it are reactive. It is secure in typical temperature, but it is oXiHu (West Lake) Dis.dized when heated to three hundred ordmC and burned if heated to 700 ordmC. It is tasteless and odorless.
Its nonmetal residence is related to silicon. In higher temperature, boron can react with oxygen, nitrogen, sulfur, halogen or carbon, and many others. It can be merged directly with a lot of kinds of metals to type boride. In addition, 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 in between boron and carbon.
two. Complex indexes:
|
Merchandise |
1st quality |
twond quality |
threerd quality |
|
Total Boron(B) articles,% |
ge95. |
ge92 |
ge90 |
|
Drinking water soluble Boron(B) content % |
le0.sixty |
le0.80 |
le1.00 |
|
pH value |
6.-eight. |
six.-eight. |
6.-eight. |
|
Moisture material, % |
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 utilized largely in metallurgy, electronics, medication, ceramics, nuke business and chemical industry and so on, and it has been utilized in the sort of compound or as a additive in alloys. It can be employed in smelting of some EPT alloy steels and as the gasoline scavenger for the melting steel, in the ignitor of igniton in the electric market, in the manage 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 raw materials for a assortment of borides. A good deal of uncommon noble metals can be substituted and saved by it. Boron and its compounds can be also used as the catalyst of some natural chemical reactions, and so on.
four. EPT directions: ToXiHu (West Lake) Dis.c by ingestion and inhalation. The central anxious method is influenced by ingestion, gastrointestinal tract is stimulated by inhalation and boron poisoning. Eyes bear sligEPT stimulation as properly. Operation should be put in with rubber gloves, a respirator and eye protection by wearing protective garments.
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