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Bismuth Disk

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Composition: Bi Form: Disk Material: Bismuth CAS Number: 7440-69-9 Commodity: Metals Coating: Uncoated Surface Finish: Standard
Bismuth Disk offers a unique combination of high density, low thermal conductivity, and exceptional diamagnetic properties, making it a valuable material in metallurgy, electronics, and precision measurement systems. Its non-toxic nature compared to lead broadens its use in environmentally safer alloys and shielding applications. Industries employ bismuth disks in low-melting-point fusible alloys, X-ray and gamma radiation shielding components, and thermoelectric devices. Specific technologies benefiting include Peltier coolers for thermal management, lead-free soldering systems, and calibration standards for Hall effect measurements. In research, Bismuth Disk is instrumental in studying semimetallic electronic structures, magnetoresistance phenomena, and the development of eco-friendly functional materials. Its distinctive combination of physical and chemical properties ensures continued demand in advanced scientific and industrial applications where precision, safety, and performance are priorities.
Starting at $427.00 each
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Material Properties

Atomic Properties
Element Value
Atomic number 83
Crystal structure Rhombohedral
Electronic structure Xe 4f¹⁴ 5d¹⁰ 6s² 6p³
Valences shown 3, 5
Atomic weight( amu ) 208.9804
Thermal neutron absorption cross-section( Barns ) 0.034
Photo-electric work function( eV ) 4.4
Atomic radius - Goldschmidt( nm ) 0.182
Ionisation potential( No./eV ) 5/ 56.0
Ionisation potential( No./eV ) 1/ 7.29
Ionisation potential( No./eV ) 3/ 25.6
Ionisation potential( No./eV ) 4/ 45.3
Ionisation potential( No./eV ) 6/ 88.3
Ionisation potential( No./eV ) 2/ 16.7
Mechanical Properties
Element Value
Material condition Polycrystalline
Poisson's ratio 0.33
Bulk modulus( GPa ) 31.3
Tensile modulus( GPa ) 34
Hardness - Vickers( kgf mm⁻² ) 16-19
Electrical Properties
Element Value
Electrical resistivity( µOhmcm ) 117@20°C
Temperature coefficient( K⁻¹ ) 0.0046@0-100°C
Thermal emf against Pt (cold 0C - hot 100C)( mV ) -7.34
Physical Properties
Element Value
Boiling point( C ) 1560
Density( gcm⁻³ ) 9.8@20°C
Thermal Properties
Element Value
Melting point( C ) 271.3
Latent heat of evaporation( J g⁻¹ ) 857
Latent heat of fusion( J g⁻¹ ) 52
Specific heat( J K⁻¹ kg⁻¹ ) 124@25°C
Thermal conductivity( W m⁻¹ K⁻¹ ) 7.9@0-100°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 13.4@0-100°C
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Available Configurations

Properties common to all products in this list

Composition: Bi Form: Disc Material: Bismuth CAS Number: 7440-69-9 Commodity: Metals Coating: Uncoated Surface Finish: Standard

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Tolerances

Disc
Thickness >0.05mm ±10%
Thickness <0.01mm ±25%
Thickness 0.01mm - 0.05mm ±15%