Tantalum Powder

Formula: Ta

Form: Powder

Material: Tantalum

CAS Number: 7440-25-7

Commodity: Metals

Purity: 99.9%

Hazard Pictogram: GHS02

Tantalum Powder is valued for having properties like a high melting point, excellent corrosion resistance and good ductility. Available in 33 variations, it has applications in electronics as capacitors and resistors, in chemical plants for corrosion resistant equipment, and in medical implants like pacemakers and bone replacements where its biocompatibility is advantageous. With its unique properties, Tantalum Powder has become an important advanced material across many industries.

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Technical Data Sheet Safety Data Sheet Tolerance Properties

Flammable

each

Tolerances

Powder

Mean Particle Size		Nominal
Minimum Particle Size		Nominal
Maximum Particle Size		Nominal
Maximum Particle Size		Nominal
Particle Size D10		Nominal
Particle Size D50		Nominal
Particle Size D90		Nominal

Material Properties for Metals

Atomic Properties

Element	Value
Atomic number	73
Crystal structure	Body centred cubic
Electronic structure	Xe 4f¹⁴ 5d³ 6s²
Valences shown	2,3,4,5
Atomic weight( amu )	180.9479
Thermal neutron absorption cross-section( Barns )	22
Photo-electric work function( eV )	4.1
Natural isotope distribution( Mass No./% )	180/ 0.012
Natural isotope distribution( Mass No./% )	181/ 99.988
Atomic radius - Goldschmidt( nm )	0.147
Ionisation potential( No./eV )	1/ 7.88
Ionisation potential( No./eV )	2/ 16.2

Mechanical Properties

Element	Value
Material condition	Hard
Material condition	Soft
Poisson's ratio	0.342
Poisson's ratio	0.342
Bulk modulus( GPa )	196.3
Bulk modulus( GPa )	196.3
Tensile modulus( GPa )	185.7
Tensile modulus( GPa )	185.7
Hardness - Vickers( kgf mm⁻² )	200
Hardness - Vickers( kgf mm⁻² )	90
Tensile strength( MPa )	760
Tensile strength( MPa )	172-207
Yield strength( MPa )	705
Yield strength( MPa )	310-380

Electrical Properties

Element	Value
Electrical resistivity( µOhmcm )	13.5@20@20°C
Superconductivity critical temperature( K )	4.47
Temperature coefficient( K⁻¹ )	0.0035@0-100°C
Thermal emf against Pt (cold 0C - hot 100C)( mV )	0.33

Physical Properties

Element	Value
Boiling point( C )	5425
Density( gcm⁻³ )	16.6@20°C

Thermal Properties

Element	Value
Melting point( C )	2996
Latent heat of evaporation( J g⁻¹ )	4165
Latent heat of fusion( J g⁻¹ )	174
Specific heat( J K⁻¹ kg⁻¹ )	140@25°C
Thermal conductivity( W m⁻¹ K⁻¹ )	57.5@0-100
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ )	6.5@0-100°C

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Material Properties for Metals