Nickel Crucible

1. The melting point of nickel is 1455 degrees, and nickel has strong alkali resistance and corrosion resistance, so nickel crucibles are often used to melt iron alloys, slag, clay, and refractory materials, etc.

2. The melting temperature of the nickel crucible should not exceed 700 degrees, because nickel is easily oxidized at high temperatures.

3. Nickel crucibles cannot be used for precipitation firing.

4. Nickel crucible is suitable for melting samples of NaOH or Na2O2, Na2CO3 or NaHCO3, and alkaline solvent containing KNO3, not suitable for melting samples of acidic solvents such as KHSO4 or NaHS04, K2S2O7 or Na2S2O7 and alkaline sulfide flux containing sulfur.

5. Metal salts such as Al, Zn, Pb, Sn, and Hg in a molten state can make the nickel crucible brittle. Borax also cannot be melted in nickel crucibles.

6. Nickel crucibles often contain trace amounts of chromium, so be careful when using them.

7. The new nickel crucible should be fired into a blue-purple in a muffle furnace to remove the oil stains on the surface, then boiled with 1:20 HCl for a while, and then rinsed with water.