Niobium Crucible
Item: Niobium Crucible
Size: Cylinder Cone and Boat
Material: R04200 R04210
Purity: 99.95%
Density: 8.57 g/cm3
Surface: Polished
Product Introduction
About this item:
Niobium Crucibles are exceptional for their outstanding thermal stability and resistance to high temperatures and corrosion, making them ideal for use in high-temperature superalloy production and crystal growth processes. Niobium inertness ensures that it does not react with most acids and molten metals, thus providing consistent performance in harsh environments. These properties make niobium crucibles indispensable in scientific research and industrial applications where material purity and durability are critical. Niobium crucible is mainly used in the metallurgical industry, chemical industry, machinery processing, glass, and ceramic industries.
Properties
Niobium Crucibles are stable in the air at room temperature and are not completely oxidized oxygen. It is directly combined with sulfur, nitrogen, and carbon at high temperatures, and can form alloys with titanium, zirconium, hafnium, and tungsten. Niobium does not interact with inorganic acids or bases, nor is it soluble in aqua regia, but soluble in hydroacids. Although it has a higher melting point (2468°C) in its elemental state, its density is lower than that of other refractory metals. Niobium is also resistant to various types of erosion and can form a dielectric oxide layer.
Chemical composition
|
Chemical Composition (%) |
||||||||||||
|
Material |
Main elements (%) |
Impurities (Maximum %) |
||||||||||
|
Nb |
Fe |
Si |
Ni |
W |
Mo |
Ti |
Ta |
O |
C |
H |
N |
|
|
R04200 |
Remainder |
0.004 |
0.004 |
0.002 |
0.005 |
0.005 |
0.002 |
0.07 |
0.015 |
0.0040 |
0.0015 |
0.003 |
|
R04210 |
Remainder |
0.01 |
0.01 |
0.005 |
0.02 |
0.01 |
0.004 |
0.10 |
0.02 |
0.01 |
0.0015 |
0.01 |
Mechanical requirements (annealed condition)
|
Grade |
Tensile strength psi (MPa), ≥ |
Yield strength δ0.2, psi (MPa),≥ |
Elongation in 1"/2" gage length, %, ≥ |
|
|
>=0.010 |
<0.010 |
|||
|
R04200, R04210 |
18000 (125) |
12000 (85) |
25 |
20 |
Applications
Niobium crucibles are essential in several high-tech industries due to their superior heat resistance and chemical inertness. Commonly used in materials science, Niobium crucibles are pivotal for growing single crystals of compounds such as sapphire and silicon, which are crucial for semiconductors and optical devices. In metallurgy, niobium plays a critical role in superalloys and special steels, as they withstand the corrosive and high-temperature environments necessary for alloy melting. Additionally, their non-reactive nature makes them ideal for chemical analysis and experiments requiring contamination-free conditions, ensuring precise and reliable results.
Niobium crucibles have superconductor properties at low temperatures. It has a critical temperature of 9.2K at standard atmospheric pressure, which is among all elemental superconductors. Its magnetic penetration depth is also among all elements. Niobium is one of three elemental Class II superconductors, the others being vanadium and technetium. The purity of niobium will greatly affect its superconducting properties. Niobium has a low cross-section for thermal neutrons and is therefore useful in the nuclear industry.
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