Tungsten Square Single Crystal

Tungsten Square Single Crystal is a high-purity, defect-free form of tungsten valued for its exceptional thermal stability, high melting point, and outstanding electron emission properties. The absence of grain boundaries improves creep resistance and enhances strength at elevated temperatures, making it critical in high-vacuum, aerospace, and electronic applications. Industries use tungsten single crystals in electron microscopy components, thermionic emitters, and X-ray generation devices where performance depends on precise electron behavior. Specific applications include field emission cathodes, ion beam sources, and high-power optics. In research, tungsten single crystals are studied for electron transport, dislocation motion, and recrystallization under extreme stress and temperature. Their unique combination of purity, mechanical strength, and electron emission capability ensures indispensable value in advanced scientific instruments and high-performance electronic systems.

Formula: W
Percentage Purity: 99.99%
Thickness: 1mm
Size: 7x7mm
Orientation: -100
Orientation Accuracy: =< 1°
Polish: Unpolished
CAS Number: 7440-33-7
UOM Code: 399-557-11
Legacy Code: W 002032
Distributor Code: GF39955711

SKU: 1000161491

Product Code: W-00-SC-000225

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Tolerances

Single Crystal

Orientation		See Item
Thickness		+2% / -1%
Length		+2% / -1%

Square

Size		+2% / -1%

Tolerances

Single Crystal

Orientation		See Item
Thickness		+2% / -1%
Length		+2% / -1%

Square

Size		+2% / -1%

Technical Data Sheet

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Material Properties for Metals

Atomic Properties

Element	Value
Atomic number	74
Crystal structure	Body centred cubic
Electronic structure	Xe 4f¹⁴ 5d⁴ 6s²
Valences shown	2,3,4,5,6
Atomic weight( amu )	183.85
Thermal neutron absorption cross-section( Barns )	18.5
Photo-electric work function( eV )	4.55
Natural isotope distribution( Mass No./% )	183/ 14.3
Natural isotope distribution( Mass No./% )	182/ 26.3
Natural isotope distribution( Mass No./% )	186/ 28.6
Natural isotope distribution( Mass No./% )	180/ 0.1
Natural isotope distribution( Mass No./% )	184/ 30.7
Atomic radius - Goldschmidt( nm )	0.141
Ionisation potential( No./eV )	1/ 7.98
Ionisation potential( No./eV )	2/ 17.7

Mechanical Properties

Element	Value
Material condition	Soft
Material condition	Hard
Poisson's ratio	0.28
Poisson's ratio	0.28
Bulk modulus( GPa )	311
Bulk modulus( GPa )	311
Tensile modulus( GPa )	411
Tensile modulus( GPa )	411
Hardness - Vickers( kgf mm⁻² )	360
Hardness - Vickers( kgf mm⁻² )	500
Tensile strength( MPa )	550-620
Tensile strength( MPa )	1920
Yield strength( MPa )	550

Electrical Properties

Element	Value
Electrical resistivity( µOhmcm )	5.4@20@20°C
Superconductivity critical temperature( K )	0.0154
Temperature coefficient( K⁻¹ )	0.0048@0-100°C
Thermal emf against Pt (cold 0C - hot 100C)( mV )	1.12

Physical Properties

Element	Value
Boiling point( C )	5660
Density( gcm⁻³ )	19.3@20°C

Thermal Properties

Element	Value
Melting point( C )	3410
Latent heat of evaporation( J g⁻¹ )	4009
Latent heat of fusion( J g⁻¹ )	192
Specific heat( J K⁻¹ kg⁻¹ )	133@25°C
Thermal conductivity( W m⁻¹ K⁻¹ )	173@0-100°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ )	4.5@0-100°C