Tungsten Disk Single Crystal

Tungsten Disk Single Crystal offers unmatched thermal stability, high melting point, and exceptional electron emission properties due to its defect-free crystal structure. Single-crystal tungsten provides superior mechanical strength at elevated temperatures, with reduced grain boundary effects that enhance durability under extreme service conditions. Industries including electronics, aerospace, and microscopy rely on tungsten single-crystal disks for thermionic emitters, high-temperature electrodes, and electron microscopy components. Specific applications include field emission cathodes, X-ray tube filaments, and precision optics. In research, tungsten single crystals are studied for electron transport mechanisms, recrystallization behavior, and performance in extreme temperature environments. Their unique combination of purity, mechanical resilience, and electron emission efficiency ensures critical importance in advanced electronic and high-vacuum technologies.

Formula: W
Percentage Purity: 99.99%
Thickness: 3mm
Diameter: 5mm
Orientation: -100
Orientation Accuracy: =< 0.4°
Polish: Polished
Surface Finish: =< 0.03µm Ra
CAS Number: 7440-33-7
UOM Code: 165-240-19
Legacy Code: W 0020AX
Distributor Code: GF16524019

SKU: 1000059683

Product Code: W-00-SC-000287

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Tolerances

Single Crystal

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

Disk

Diameter		+2% / -1%

Tolerances

Single Crystal

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

Disk

Diameter		+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