High Purity Nickel Crucible

Nickel crucibles are suitable for melting samples in NaOH, Na2O2, NaCO3, NAHCO3 and alkaline solvents containing KNO, the melting temperature does not exceed 700°C, because at high temperatures, nickel is easily oxidised sodium oxide can also be melted in nickel crucibles, but the temperature should be below 500°C and the time should be short, otherwise the erosion will be serious and the nickel salt content brought into solution will increase and become an impurity in the determination. The nickel salt content in the solution will increase and become an impurity in the determination.

New nickel crucibles should be cauterised at 700°C for a few minutes before use, then boiled for a few moments in 1:20 HCl and rinsed with water. The crucible should be dark green or grey-black after treatment to remove oil and to create an oxide film on the surface to prolong its life. Later on, the crucible should be boiled and washed with water before each use. If necessary, a small amount of hydrochloric acid can be added drop by drop and boiled for a few moments, then washed with distilled water and dried for use.

1.Product name: High purity nickel crucible

2. Process: Welding and forming

3. Grade: N6

4.Purity: 99.6% pure nickel

5. Density: 8.9 g/cm3

6. Melting point: 1455°C

7. Specification: can be produced according to customers' requirements

8. Field of application: mainly used in corrosion resistant industry.

9. Specification: 30ml, 50ml

10.Size data (for reference only):

Upper mouth:30ml→41mm;50ml→47mm

Lower mouth:30ml→22mm;50ml→26mm

Height:30ml→36mm;50ml→40mm

High purity nickel crucibles are commonly used for the melting of sodium peroxide and sodium hydroxide. The nickel-chromium crucibles are not easily oxidised and can withstand high temperatures. Transition metals, especially manganese, can enter the melt of the sample in large quantities during melting. Nickel becomes brittle when heated with sulphur or sulphides. Compounds of silver, mercury and vanadium should not be handled in the crucible. Borax is not suitable as a melting agent and, with the exception of the analysis of constant silicates, nickel crucibles are only suitable for handling samples of rare elements (e.g. molybdenum, niobium).

Nickel has a melting point of 1450°C and is easily oxidised by burning in air, so nickel crucibles cannot be used for burning and weighing precipitates. Nickel has good resistance to alkaline attack, so it is mainly used in the laboratory for the melting of alkaline melts.

2、Special attention

If sulphur-containing compounds are to be melted, this should be done in an oxidising environment with an excess of sodium peroxide. Metal salts of aluminium, zinc, tin, lead etc. in the molten state can make it brittle.It should be noted that acidic solvents such as potassium metabisulphate, potassium bisulphate and sulphide containing substances cannot be used in nickel crucibles, nor can silver, mercury, vanadium compounds and borax be cauterised in nickel crucibles.

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