Listed below are some fluxes that can be used in these zirconium crucibles.
Sodium Peroxide Fusion
Used with very refractory or high-silica materials such as chromite, magnetite, illmenite, rutile, silicon, silicon carbide, and certain alloys and steels. An excellent general flux for almost any material.
Sodium Carbonate Fusion
Decomposes most silicates of aluminum, calcium, chromium, nickel; also halides of silver; and sulfates of barium and lead.
Lithium Salt Fusion
Flux for oxide and silicate materials when sodium and potassium need to be determined or when large amounts of sodium would interfere with x-ray fluorescence or atomic absorption procedures.
While prolonged exposure to air at temperatures of more than 750°C can have a negative effect on zirconium, this can be reduced by either: (1) using the cooler, but reducing, portion of the flame, or (2) enveloping the crucible in an inert atmosphere.
Three Styles are Available