Bismuth Disk

Formula: Bi

Form: Disk

Material: Bismuth

CAS Number: 7440-69-9

Commodity: Metals

Goodfellow's bismuth disks, available with a maximum purity of 99.999% (5N), offer unique properties that make them valuable in various applications. Bismuth is known for its low melting point, slight radioactivity, and tendency to expand upon solidification. These characteristics make it useful in the production of alloys, pharmaceuticals, and cosmetics. In the electronics industry, bismuth is increasingly used as a lead replacement in solders due to its non-toxic nature. Its thermoelectric properties make it valuable in cooling devices and sensors. In research, high-purity bismuth is crucial for studying superconductivity at low temperatures and in the development of novel materials. The growing importance of bismuth in green technologies and medical applications underscores its significance in both scientific research and industrial innovation.

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Technical Data Sheet Safety Data Sheet Tolerance Properties

each

Tolerances

Disk

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

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Bismuth Disk

Tolerances

Material Properties for Metals