Bismuth Disk

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.

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Tolerance

Properties

Reference & Citations

each

Tolerances

Disc

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

Material Properties for Metals

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@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