|
![]() |
#1351 |
..........
Join Date: Dec 2006
Casino cash: $4167901
|
The name beryllium comes from the Greek beryllos, beryl, from Prakrit veruliya, from Pāli veuriya; possibly from or simply akin to a Dravidian source represented by Tamil veiruor, viar, "to whiten, become pale."[1] At one time beryllium was referred to as glucinium (from Greek glykys, sweet), due to the sweet taste of its salts. This element was discovered by Louis Vauquelin in 1798 as the oxide in beryl and in emeralds. Friedrich Wöhler and A. A. Bussy independently isolated the metal in 1828 by reacting potassium and beryllium chloride.
|
Posts: 28,392
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
![]() |
![]() |
#1352 |
..........
Join Date: Dec 2006
Casino cash: $4167901
|
Beryllium is an essential constituent of about 100 out of about 4000 known minerals, the most important of which are bertrandite (Be4Si2O7(OH)2), beryl (Al2Be3Si6O18), chrysoberyl (Al2BeO4), and phenakite (Be2SiO4). Precious forms of beryl are aquamarine and emerald.
|
Posts: 28,392
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
![]() |
![]() |
#1353 |
..........
Join Date: Dec 2006
Casino cash: $4167901
|
The most important commercial sources of beryllium and its compounds are beryl and bertrandite. Beryllium metal did not become readily available until 1957. Currently, most production of this metal is accomplished by reducing beryllium fluoride with magnesium metal. The price on the US market for vacuum-cast beryllium ingots was 338 US$ per pound ($745/kg) in 2001.[2]BeF2 + Mg → MgF2 + Be
|
Posts: 28,392
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
![]() |
![]() |
#1354 |
..........
Join Date: Dec 2006
Casino cash: $4167901
|
Beryllium is used as an alloying agent in the production of beryllium-copper, containing up to 2.5% beryllium. Beryllium-copper alloys are used in a wide variety of applications because of their combination of high electrical and thermal conductivity, high strength and hardness, nonmagnetic properties, along with good corrosion and fatigue resistance. These applications include the making of spot-welding electrodes, springs, non-sparking tools and electrical contacts.
|
Posts: 28,392
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
![]() |
![]() |
#1355 |
..........
Join Date: Dec 2006
Casino cash: $4167901
|
Beryllium metal is, due to its stiffness, light weight, and dimensional stability over a wide temperature range, used in the defense and aerospace industries as light-weight structural materials in high-speed aircraft, missiles, space vehicles and communication satellites.
|
Posts: 28,392
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
![]() |
![]() |
#1357 |
..........
Join Date: Dec 2006
Casino cash: $4167901
|
Beryllium is an effective p-type dopant in III-V compound semiconductors. It is widely used in materials such as GaAs, AlGaAs, InGaAs, and InAlAs grown by molecular beam epitaxy (MBE).
|
Posts: 28,392
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
![]() |
![]() |
#1358 |
..........
Join Date: Dec 2006
Casino cash: $4167901
|
In the field of X-ray lithography beryllium is used for the reproduction of microscopic integrated circuits
|
Posts: 28,392
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
![]() |
![]() |
#1359 |
..........
Join Date: Dec 2006
Casino cash: $4167901
|
In the telecommunications industry, Beryllium is made into tools that are used to tune the highly magnetic klystrons used for high power microwave transmissions for safety.
|
Posts: 28,392
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
![]() |
![]() |
#1360 |
..........
Join Date: Dec 2006
Casino cash: $4167901
|
Because it has a low thermal neutron absorption cross section, the nuclear power industry uses this metal in nuclear reactors as a neutron reflector and moderator.
|
Posts: 28,392
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
![]() |
![]() |
#1361 |
..........
Join Date: Dec 2006
Casino cash: $4167901
|
Beryllium is used in nuclear weapons for similar reasons. For example, the critical mass of a plutonium sphere is significantly reduced if the plutonium is surrounded by a beryllium shell.
|
Posts: 28,392
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
![]() |
![]() |
#1363 |
..........
Join Date: Dec 2006
Casino cash: $4167901
|
Beryllium is also used in the making of gyroscopes, various computer equipment, watch springs and instruments where light-weight, rigidity and dimensional stability are needed.
|
Posts: 28,392
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
![]() |
![]() |
#1364 |
..........
Join Date: Dec 2006
Casino cash: $4167901
|
Beryllium oxide is useful for many applications that require an excellent heat conductor, with high strength and hardness, with a very high melting point, and that acts as an electrical insulator.
|
Posts: 28,392
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
![]() |
![]() |
#1365 |
..........
Join Date: Dec 2006
Casino cash: $4167901
|
Beryllium compounds were once used in fluorescent lighting tubes, but this use was discontinued because of berylliosis in the workers manufacturing the tubes.
|
Posts: 28,392
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
![]() |
![]() ![]() |
|
|