Amorphous Elemental Boron
Govt stXiHu (West Lake) Dis.Hu (West Lake) Dis.rd: Q/YTY002-2011
English alias: Boron
CAS RN: 7440-42-8
1. Physical and chemical houses:
one.one Elementary symbol: B
one.two Atomic fat: 10.81(on 1979 international atomic weight)
one.3 Melting point: 2300 plusmn2 ordmC
one.4 Sublimation temperature: 2550 ordmC
1.five Specific gravity: 2.34-2.37
1.six Solubility: Insoluble in h2o, ethanol, ethyl ether and hydrochloric acid, but dissolved in chilly concentrated standard remedy and decomposed H2 at the very same time. It can be oXiHu (West Lake) Dis.dized by concentrated sulfuric acid or nitric acid to boric acid.
1.seven Houses:
Boron is among metallic series with nonmetal collection on the periodic table of aspects. As its robust electronegative, little atomic radius, and centralized nuclear charge, the chemical houses of it are reactive. It is steady in normal 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 house is equivalent to silicon. In higher temperature, boron can react with oxygen, nitrogen, sulfur, halogen or carbon, and so on. It can be merged straight with a lot of types 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.
2. Complex indexes:
|
Item |
1st quality |
twond quality |
3rd quality |
|
Total Boron(B) content,% |
ge95. |
ge92 |
ge90 |
|
H2o soluble Boron(B) content material % |
le0.60 |
le0.eighty |
le1.00 |
|
pH worth |
6.-8. |
six.-eight. |
six.-eight. |
|
Moisture content, % |
le1.00 |
le1.00 |
le1.00 |
|
H2O2 insoluble, % |
le0.70 |
le0.70 |
le1.fifty |
|
Physical appearance |
Pale brown or brown-black powder |
||
3. Application: Boron has been utilised primarily in metallurgy, electronics, medication, ceramics, nuke market and chemical sector and many others, and it has been utilised in the type of compound or as a additive in alloys. It can be utilised in smelting of some EPT alloy steels and as the gasoline scavenger for the melting metal, in the ignitor of igniton in the electric market, in the control rod of atomic reactor, and as the substantial-power fuels for rocket. It has been as an EPTant materials for manufacturing substantial-purity of halogenated boron and a raw substance for a variety 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 chemical reactions, and many others.
four. EPT guidelines: ToXiHu (West Lake) Dis.c by ingestion and inhalation. The central anxious system is motivated by ingestion, gastrointestinal tract is stimulated by inhalation and boron poisoning. Eyes bear sligEPT stimulation as properly. Procedure have to be set up with rubber gloves, a respirator and eye safety by wearing protective clothes.
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