Precautions for the use of niobium crucibles
Precautions for the use of niobium crucibles mainly include the following points:
Melting temperature: Niobium crucibles are suitable for melting in alkaline solvents, and their melting temperature generally does not exceed 700℃.
At high temperatures, niobium is easily oxidized, so sodium oxide can also be melted in niobium crucibles, but the temperature must be lower than 500℃ and the time must be short, otherwise it will be severely corroded.
Pre-treatment: New niobium crucibles should be burned at 700℃ for several minutes before use, then boiled with 1:20HCl for a while, and then rinsed with water. This can remove oil stains and form an oxide film on its surface, extending its service life.
The treated crucible should be dark green or gray-black. In the future, boil and wash with water before each use. If necessary, add a small amount of hydrochloric acid and boil for a while, then wash with distilled water, dry and use.
Related parameters of niobium crucibles
|
Product Name |
Niobium crucible |
|
Purity |
99.95(%) |
|
Grade |
Nb1 |
|
Size |
Customized size |
|
Melting point |
2468 degree centigrade |
|
Boiling point |
4742 degree centigrade |
|
Density |
8.57g/m3 |
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