Amorphous Elemental Boron
Executive stXiHu (West Lake) Dis.Hu (West Lake) Dis.rd: Q/YTY002-2011
English alias: Boron
CAS RN: 7440-42-8
one. Physical and chemical properties:
1.1 Elementary image: B
one.2 Atomic weight: ten.81(on 1979 intercontinental atomic weight)
1.3 Melting level: 2300 plusmn2 ordmC
1.4 Sublimation temperature: 2550 ordmC
1.five Distinct gravity: 2.34-2.37
one.6 Solubility: Insoluble in h2o, ethanol, ethyl ether and hydrochloric acid, but dissolved in cold concentrated standard 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 Properties:
Boron is between metal sequence with nonmetal sequence on the periodic table of factors. As its sturdy electronegative, modest atomic radius, and centralized nuclear charge, the chemical houses of it are reactive. It is steady in typical 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 high temperature, boron can respond with oxygen, nitrogen, sulfur, halogen or carbon, and many others. It can be blended right with several kinds of metals to sort boride. Moreover, boron can be also reacted with natural and organic compounds to synthesize some compounds, in which boron is straight joined to carbon, or oxygen eXiHu (West Lake) Dis.sts in between boron and carbon.
2. Specialized indexes:
|
Product |
1st grade |
twond quality |
3rd grade |
|
Complete Boron(B) material,% |
ge95. |
ge92 |
ge90 |
|
Water soluble Boron(B) articles % |
le0.60 |
le0.80 |
le1.00 |
|
pH benefit |
six.-eight. |
6.-8. |
six.-eight. |
|
Dampness articles, % |
le1.00 |
le1.00 |
le1.00 |
|
H2Otwo insoluble, % |
le0.70 |
le0.70 |
le1.50 |
|
Look |
Pale brown or brown-black powder |
||
3. Application: Boron has been utilised mostly in metallurgy, electronics, medicine, ceramics, nuke sector and chemical market and so on, and it has been utilized in the type of compound or as a additive in alloys. It can be used in smelting of some EPT alloy steels and as the gasoline scavenger for the melting metal, in the ignitor of igniton in the electrical industry, in the management rod of atomic reactor, and as the substantial-energy fuels for rocket. It has been as an EPTant substance for producing large-purity of halogenated boron and a raw substance for a selection of borides. A good deal of exceptional noble metals can be substituted and saved by it. Boron and its compounds can be also used as the catalyst of some organic chemical reactions, etc.
four. EPT instructions: 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 effectively. Operation have to be mounted with rubber gloves, a respirator and eye protection by sporting protective apparel.
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