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Features
CAS Number: | 7440-03-1 |
Purity: | 99.9%, 99.95%, 99.99%, 99.995% |
Standard: | ASTM B392 |
Surface: | Polished |
Size: | Rod: 10mm-295mm Dia.×1500 mm Length Sheet: 1mm-5mm Thickness, 1000mm Max Width |
Residual Resistance Ration (RRR): | ≥300 |
Material Grade: | R04200-Type 1 -Reactor grade unalloyed niobium |
Superconducting Niobium Rod and Sheet Description
The superconducting Radio Frequency (RF) cavities used in the free electron lasers are made from high purity niobium with high Residual Resistivity Ratio (RRR). Niobium superconducting Residual Resistivity Ratio (RRR) is defined as the ratio of niobium superconducting resistivity and low temperature superconducting niobium resistivity under room temperature. With the increase of material's purity and decrease of interior stress, RRR value is reduced. RRR value can be used to measure purity of the metal. SSC can produce niobium products based on the RRR value customer required. RRR niobium is usually manufactured in shape of rod and sheet. Products in ingot and tube are also available by request.
In addition, niobium titanium alloys are used as a type II superconductor materials for superconducting magnets. Applications of these superconducting magnets include magnetic resonance imaging and nuclear magnetic resonance instruments, and in particle accelerators. The alloys are generally available with 47%, 50%, and 55% titanium. Please contact us for more details.
Chemical Composition
RRR Superconducting Grade Pure Niobium R04220 | Chemical Compositions Max Weight % | |||||||||||
C | N | O | H | Zr | Ta | Fe | Si | W | Ni | Ti | Nb | |
0.003 | 0.003 | 0.004 | 0.0005 | 0.01 | 0.1 | 0.005 | 0.005 | 0.007 | 0.003 | 0.005 | Balance | |
Superconducting Niobium Rod and Sheet Specification
Impurity (ppm)
Residual Resistivity Ratio (RRR) | Ta | W | Ti | Fe | Mo | Ni | H | N | O | C |
> 300 | ≤ 500, ppm | ≤ 70 | ≤ 50 | ≤ 30 | ≤ 50 | ≤ 30 | ≤ 2 | ≤ 10 | ≤ 10 | ≤ 10 |
Applications and Related Industries for Superconducting Niobium Rod and Sheet
● RF superconducting cavities
Chemical Identifiers
Linear Formula | Nb |
MDL Number | MFCD00011126 |
EC No. | 231-113-5 |
Beilstein/Reaxys No. | N/A |
Pubchem CID | 23936 |
SMILES | [Nb] |
InchI Identifier | InChI=1S/Nb |
InchI Key | GUCVJGMIXFAOAE-UHFFFAOYSA-N |
Niobium Rod and Sheet Properties (Theoretical)
Molecular Weight | 92.9 |
Appearance | Silvery |
Melting Point | 2468 °C |
Boiling Point | 4742 °C |
Density | 8.57 g/cm3 |
Solubility in H2O | N/A |
Electrical Resistivity | 12.5 microhm-cm @ 0 °C |
Electronegativity | 1.6 Paulings |
Heat of Vaporization | N/A |
Poisson's Ratio | 0.4 |
Specific Heat | 0.064 Cal/g/K @ 25 °C |
Tensile Strength | N/A |
Thermal Conductivity | 0.537 W/cm/K @ 298.2 K |
Thermal Expansion | 7.3 µm/(m·K) |
Vickers Hardness | 1320 MPa |
Young's Modulus | 105 GPa |
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