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Tantalum (metal) Single Crystal
Tantalum (Ta) is a dark blue-gray metal that is very heavy, ductile and hard and has high corrosion resistance. Tantalum is especially resistant to chemicals at temperatures below 150 °C and can only be dissolved with hydrofluoric acid. It has the fourth highest melting point of all metals and is able to form extremely thin and protective oxide layers for high-quality capacitors, making it an excellent material for single crystal.
Applications:
• Used in the fabrication of semiconductors.
• Used for lasers and nonlinear optics.
Crystal Properties:
State: single crystal
Production method: Floating zone
Crystal Phase / Structure: α: body-centered cubic (bcc) / β: tetragonal
Standard size: diameter 6-12mm
Thickness: 1-2mm
Orientation: (100), (110) and (111)
Orientation accuracy: <2°, <1°, <0.5° or <0.1°
Polishing: as cut, one or two sides polished
Roughness of surface: <0.03µm
Purity: 99.99%
Typical Analysis:
Al < 1 ppm N 90 ppm
C 80 O 120
Co < 3 S < 10
Cu < 1 Si 25
Fe 5 Ta balance
H < 10
Metal Specifications:
Molecular Weight 180.94
Appearance Silvery-gray solid
Melting Point 3017 °C
Boiling Point 5458 °C
Density 16.69 g/cm3 (20 °C)
Electrical Resistivity 131 nΩ·m (20 °C)
Electronegativity 1.5 Paulings
Heat of Fusion 36.57 kJ/mol
Heat of Vaporization 753 kJ/mol
Poisson's Ratio 0.34
Specific Heat 140 J/kg·K
Thermal Conductivity 57.5 W/m·K
Thermal Expansion 6.3 µm/m·K
Vickers Hardness 870–1200 MPa
Young's Modulus 186 GPa