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Molybdenum Top Hat Single Crystal

Available Configurations

Properties common to all products in this list

Composition: Mo Form: Single Crystal Material: Molybdenum CAS Number: 7439-98-7 Commodity: Metals Purity: 99.999% Top Section Thickness: 1mm Bottom Section Thickness: 1mm Inside Diameter: 8mm Outside Diameter: 10mm
Molybdenum Top Hat Single Crystal provides exceptional thermal conductivity, high melting point, and structural integrity in a precision-machined geometry with controlled crystallographic orientation. The single-crystal nature eliminates grain boundaries, enhancing uniform electron transport and resistance to creep under high stress. Industries such as semiconductors, optics, and nuclear systems employ these components in X-ray targets, epitaxial film substrates, and high-precision thermal management assemblies. Specific applications include electron microscopy calibration standards, vacuum device components, and thin-film growth requiring defect-free surfaces. Research uses extend to studies of anisotropic thermal expansion, defect-free crystal growth, and performance under extreme irradiation environments. The top-hat geometry enables reliable mechanical mounting while ensuring uniform distribution of thermal and electrical loads, reinforcing its role as a specialized material for high-precision scientific instruments and demanding industrial applications.
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Material Properties

Atomic Properties
Element Value
Atomic number 42
Crystal structure Body centred cubic
Electronic structure Kr 4d⁵ 5s¹
Valences shown 2, 3, 4, 5, 6
Atomic weight( amu ) 95.94
Thermal neutron absorption cross-section( Barns ) 2.65
Photo-electric work function( eV ) 4.2
Natural isotope distribution( Mass No./% ) 95/ 15.9
Natural isotope distribution( Mass No./% ) 96/ 16.7
Natural isotope distribution( Mass No./% ) 98/ 24.1
Natural isotope distribution( Mass No./% ) 97/ 9.6
Natural isotope distribution( Mass No./% ) 92/ 14.8
Natural isotope distribution( Mass No./% ) 94/ 9.3
Natural isotope distribution( Mass No./% ) 100/ 9.6
Atomic radius - Goldschmidt( nm ) 0.14
Ionisation potential( No./eV ) 2/ 16.15
Ionisation potential( No./eV ) 5/ 61.2
Ionisation potential( No./eV ) 68
Ionisation potential( No./eV ) 1/ 7.10
Ionisation potential( No./eV ) 3/ 27.2
Ionisation potential( No./eV ) 4/ 46.4
Mechanical Properties
Element Value
Material condition Hard
Material condition Soft
Poisson's ratio 0.293
Poisson's ratio 0.293
Bulk modulus( GPa ) 261.2
Bulk modulus( GPa ) 261.2
Tensile modulus( GPa ) 324.8
Tensile modulus( GPa ) 324.8
Hardness - Vickers( kgf mm⁻² ) 250
Hardness - Vickers( kgf mm⁻² ) 200
Tensile strength( MPa ) 485-550
Tensile strength( MPa ) 620-690
Yield strength( MPa ) 550
Yield strength( MPa ) 415-450
Electrical Properties
Element Value
Electrical resistivity( µOhmcm ) 5.7@20°C
Superconductivity critical temperature( K ) 0.915
Temperature coefficient( K⁻¹ ) 0.00435@0-100°C
Thermal emf against Pt (cold 0C - hot 100C)( mV ) 1.45
Physical Properties
Element Value
Boiling point( C ) 4612
Density( gcm⁻³ ) 10.22@20°C
Thermal Properties
Element Value
Melting point( C ) 2617
Latent heat of evaporation( J g⁻¹ ) 6153
Latent heat of fusion( J g⁻¹ ) 290
Specific heat( J K⁻¹ kg⁻¹ ) 251@25°C
Thermal conductivity( W m⁻¹ K⁻¹ ) 138@0-100°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 5.1@0-100°C
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Available Configurations

Properties common to all products in this list

Composition: Mo Form: Single Crystal Material: Molybdenum CAS Number: 7439-98-7 Commodity: Metals Purity: 99.999% Top Section Thickness: 1mm Bottom Section Thickness: 1mm Inside Diameter: 8mm Outside Diameter: 10mm

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Tolerances

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

Tolerances

Top Hat
Inside Diameter +2% / -1%
Outside Diameter +2% / -1%
Bottom Section Thickness +2% / -1%
Top Section Thickness +2% / -1%