|
BERYLLIUM
(Be)
GENERAL
PROPERTIES
|
Symbol:
|
Be
|
|
Atomic
Number:
|
4
|
|
Atomic
Weight:
|
9.01218
|
|
Density:
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1.848
gm/cc
|
|
Melting
Point:
|
1277
oC
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|
Boiling
Point:
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2970
oC
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|
Thermal
Conductivity:
|
2.01
W/cm/oK @ 298.2 oK
|
|
Electrical
Resistivity:
|
4.0
microhm-cm @ 20 oC
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|
Electronegativity:
|
1.5
Paulings
|
|
Specific
Heat:
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0.436
Cal/g/oK @ 25 oC
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|
Heat
of Vaporization:
|
73.9
K-cal/gm atom at 2467 oC
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|
Heat
of Fusion:
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2.8
Cal/gm mole
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MATERIAL
OVERVIEW
Characteristics:
A hard, brittle, gray-white; soluble in acids (except
nitric) and alkalies.
Resistant to oxidation at ordinary
temperatures. High heat capacity and thermal
conductivity. It
is the lightest structural metal known; can be
fabricated by rolling, forging, and machining. Joining
is chiefly by shrink-fitting; brazing and welding are
difficult. Permeable to x-rays.
Derivation:
The ore is converted to the oxide or hydroxide, then
to the chloride or fluoride.
The halide may be (a) reduced in a furnace by
magnesium metal, or (b) reduced by electrolysis.
(c) Liquid-liquid extraction with an
organophosphate chelating agent can be used as a
method of
purification, or as an alternative process on the ore
itself.
Hazard:
Highly toxic, especially by inhalation of dust.
Tolerance, 0.002 mg/m3
of
air. A known carcinogen (OSHA).
TYPICAL
ANALYSES
Impurities
in ppm
|
Material
/ Purity:
|
2N8
|
3N
|
|
BeO
|
300
|
170
|
|
Fe
|
200
|
125
|
|
Al
|
100
|
35
|
|
Mg
|
20
|
7
|
|
Si
|
100
|
67
|
|
Cr
|
25
|
10
|
|
Co
|
20
|
4
|
|
Cu
|
40
|
12
|
|
Th
|
50
|
1
|
|
Mn
|
50
|
17
|
|
Mo
|
30
|
9
|
|
Ni
|
90
|
47
|
|
Ca
|
40
|
17
|
|
Zn
|
50
|
24
|
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Ag
|
20
|
3
|
|
Ti
|
15
|
7
|
|
Pb
|
20
|
5
|
|
Zr
|
32
|
10
|
FOIL
|
Material
|
Purity
|
|
Beryllium
Foil .001”
|
2N8,
3N
|
|
Beryllium
Foil .002”
|
2N8,
3N
|
|
Beryllium
Foil .003”
|
2N8,
3N
|
|
Beryllium
Foil .004”
|
2N8, 3N
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|
Beryllium
Foil .005”
|
2N8, 3N
|
|
Beryllium
Foil .006”
|
2N8, 3N
|
|
Beryllium
Foil .007”
|
2N8, 3N
|
|
Beryllium
Foil .008”
|
2N8, 3N
|
|
Beryllium
Foil .009”
|
2N8, 3N
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Foil
is cut to order and sold by the square inch.
SHEET
|
Material
|
Purity
|
|
Beryllium
Sheet .010” to .050”
|
2N8,
3N
|
Sheet
thicknesses are available in increments of .001”.
Sheet is cut to order and sold by the square inch or square foot.
POWDER, SHOT, PELLETS, & INGOT
|
Material
|
Purity
|
|
Beryllium
Shot .125"
|
2N8,
3N
|
|
Beryllium
Pieces 1” by Down
|
2N8,
3N
|
|
Beryllium
Pellets .250"D
X .125"L
|
2N8,
3N
|
|
Beryllium
Pellets .250"D X .250"L
|
2N8,
3N
|
|
Beryllium
Ingot
|
2N8,
3N
|
|
Beryllium
Powder-100 Mesh
|
2N8,
3N
|
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Beryllium
Powder-325 Mesh
|
2N8,
3N
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Powder,
shot, pellets, and ingots are packaged to order and
sold by the gram or kilogram.
COMPOUNDS
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Material
|
Purity
|
|
Beryllium
Boride Be4B,
-80 Mesh
|
1N8
|
|
Beryllium
Boride Be2B,
-80 Mesh
|
1N8
|
|
Beryllium
Boride BeB2,
-80 Mesh
|
1N8
|
|
Beryllium
Boride BeB6,
-80 Mesh
|
1N8
|
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Beryllium
Oxide BeO, -200 Mesh
|
2N5
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Compounds
are packaged to order and sold by the gram or
kilogram.
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