SILICON, a tetravalent metalloid, is a chemical element with the symbol Si and
atomic number 14.
Elemental silicon also has a large impact on the modern world economy. Although most free silicon is
used in the steel refining, aluminum-casting, and fine chemical industries (often to make fumed
silica), the relatively small portion of very highly purified silicon that is used in semiconductor
electronics (< 10%) is perhaps even more critical. Because of wide use of silicon in integrated
circuits, the basis of most computers, a great deal of modern technology depends on it.
Silicon is a solid at room temperature, with relatively high melting and boiling points of 1414
and 3265 degrees Celsius respectively. It has a greater density in a liquid state than a solid
state.
With a relatively high thermal conductivity of 149 W•m−1•K−1, silicon conducts heat well and as a
result is not often used to insulate hot objects. In its crystalline form, pure silicon has a gray
color and a metallic luster.
Most metallurgical silicon metal is used as an alloying agent in the aluminium industry due to its
ability to increase the strength of aluminium. Demand from the aluminium industry has grown
steadily in recent years due to increased usage of aluminium in structural engineering, aircraft
manufacture and the automotive industry. Aluminium alloys are lighter and more resistant to
corrosion than carbon-steel and can be made by addition of metals such as copper, zinc, magnesium,
manganese as well as silicon.
Elemental silicon not alloyed with significant quantities of other elements, and usually > 95%,
is often referred to loosely as silicon metal. Metallurgical grade silicon is commercially
prepared by the reaction of high-purity silica with wood, charcoal, and coal in an electric arc
furnace using carbon electrodes.
It being the carbo thermic reaction of silica (quartz) in an electric arc furnace using carbon
electrodes where the temperature in the main reaction zone of temperatures exceeds 1800ºC
At temperatures over 1,900 °C (3,450 °F), the carbon in the aforementioned materials and the
silicon undergo the chemical reaction
SiO2 + 2 C → Si + 2 CO.
Liquid silicon collects in the bottom of the furnace, which is then drained and cooled. The
silicon produced this manner is called metallurgical grade silicon and is at least 98% pure.
Using this method, silicon carbide (SiC) may also form from an excess of carbon in one or both of
the following ways:
SiO2 + C → SiO + CO or SiO + 2 C → SiC + CO.
However, provided the concentration of SiO2 is kept high, the silicon carbide can be eliminated by
the chemical reaction
2 SiC + SiO2 → 3 Si + 2 CO
As noted above, metallurgical grade silicon "metal" has its primary use in the aluminum casting
industry to make aluminum-silicon alloy parts. The remainder (about 45%) is used by the chemical
industry, where it is primarily employed to make fumed silica.
APPLICATIONS:
Adding Silicon Metal to aluminium alloys makes them strong and light. As a result they are
increasingly used in the automotive industry to replace heavier cast iron components. This allows
weight reductions, a reduction in fuel consumption, increased efficiencies and subsequent benefits
to the environment by reducing the greenhouse gas emissions and conserving fossil fuels.
There is increasing demand for Silicon Metal from the solar power generating industry where solar
panels are made from silicon, which use the sun’s energy to produce domestic and industrial
electricity. Silicon based polymers are also used as alternatives to hydrocarbon based products.
They can appear in many every day products such as lubricants, greases, resins, skin and hair
products. A more well known use of silicon is silicon chips, produced from semi-conductor grade
silicon they are components in many every day electronic devices.
Type: 2202, 3303, 3205, 411, 521, 441, 553
1)2202
Si: 99.5%min, Fe: 0.2%max, Al: 0.2%max, Ca: 0.02%max, P: 0.004%max |
2) 3303
Si: 99.3%min, Fe: 0.3%max, Al: 0.3%max, Ca: 0.03%max, P: 0.005%max |
3) 411
Si: 99.2%min, Fe: 0.4%max, Al: 0.1%max, Ca: 0.1%max, P: 0.005%max |
4) 441
Si: 99.2%min, Fe: 0.4%max, Al: 0.4%max, Ca: 0.1%max, P: 0.005%max |
5) 521
Si: 99.2%min, Fe: 0.5%max, Al: 0.2%max, Ca: 0.1%max, P: 0.005%max |
6) 553
Si: 98.5%min, Fe: 0.5%max, Al: 0.5%max, Ca: 0.3%max, P: 0.005%max |
Size: 10-100 mm
Chemical Element
|
Mn
|
C
|
S
|
P
|
Si
|
Fe
|
99.9 Min
|
99.90%
|
0.01
|
0.02
|
0.001
|
0.002
|
0.001
|
99.7 Min
|
99.70%
|
0.04
|
0.05
|
0.005
|
0.01
|
0.03
|
97 Min
|
97%
|
0.05
|
0.02
|
0.03
|
0.4
|
2
|
96 Min
|
96%
|
0.1
|
0.05
|
0.05
|
0.5
|
2.3
|
95 Min
|
95%
|
0.15
|
0.06
|
0.06
|
0.8
|
2.8
|
94-96 Min
|
94-96%
|
0.02
|
0.03
|
0.002
|
0.002
|
0.001
|
92-94 Min
|
92-94%
|
0.02
|
0.03
|
0.002
|
0.002
|
0.001
|
We are the super-stockist & the largest suppliers of
Magnesium Metal.
MAGNESIUM is a chemical element, designated by the symbol Mg. It has the atomic
number 12.
Magnesium is the fourth-most-common element in the Earth as a whole (behind iron,
oxygen and silicon), making up 13% of the planet's mass and a large fraction of the planet's
mantle. Due to magnesium ion's high solubility in water, it is the third-most-abundant element
dissolved in seawater. Magnesium is produced in stars larger than 3 solar masses by fusing helium
and neon in the alpha process at temperatures above 600 Mega Kelvin.
Magnesium is generally obtained mainly by electrolysis of magnesium salts obtained from brine. In
commerce, the chief use for the metal is as an alloying agent to make aluminium-magnesium alloys,
sometimes called magnesium. Since magnesium is less dense than aluminium, these alloys are prized
for their relative lightness and strength.
APPLICATION:
The main applications of magnesium are, in order: component of aluminium alloys, in die-casting
(alloyed with zinc) to remove sulphur in the production of iron and steel, the production of
titanium in the Kroll process.
Magnesium, in its purest form, can be compared with aluminium, and is strong and light, so it is
used in several high-volume part manufacturing applications, including automotive and truck
components. Specialty, high-grade car wheels of magnesium alloy are called "mag
wheels", although the term is often more broadly misapplied to include aluminium
wheels.
The high magnesium content used for the crankcase of the late-World War II Wright Duplex Cyclone
eighteen-cylinder radial aviation engine was a serious problem for the earliest examples of the
Boeing B-29 heavy bomber, as engine fires in flight could ignite the engine crankcases, literally
"torching" the wing spar apart in under a minute, causing wing failure.
PRODUCTS MADE OF MAGNESIUM:
Fire starter and shavings, sharpener, magnesium ribbon.
The second application field of magnesium is electronic devices. Because of low weight, and good
mechanical and electrical properties, magnesium is widely used for manufacturing of mobile phones,
laptop and tablet computers, cameras, and other electronic components.
TECHNICAL SPECIFICATION:
We have in our collection a qualitative range of Magnesium Metals. Our personnel conduct stringent
market survey and procure these metals from reputed manufacturers in the industry. These are in
accordance with the set industry standards and offered at competitive prices. Our range finds
usage in various industry applications.
CHEMISTRY
Mg
|
Al
|
Mn
|
Si
|
Fe
|
Cl
|
Cu
|
Ni
|
99.98
|
0.004
|
0.002
|
0.003
|
0.002
|
0.002
|
0.001
|
0.001
|
99.95
|
0.01
|
0.01
|
0.01
|
0.003
|
0.003
|
0.002
|
0.001
|
99.9
|
0.02
|
0.03
|
0.02
|
0.04
|
0.005
|
0.004
|
0.001
|
99.8
|
0.05
|
0.05
|
0.03
|
0.05
|
0.005
|
0.02
|
0.002
|