Some aluminum alloys contain elements that reduce the silica as well as iron oxide, zinc oxide and other oxides in refractories. Careful attention is necessary in choosing an appropriate refractory for more aggressive aluminum alloys to reduce the potential for reaction.
Jun 02, 2018 · Chromium Oxide. Chrome oxide can yield a variety of colors: red, yellow, pink, brown, and especially green. Chrome is volatile at cone 6 and above and may jump from pot to pot causing streaks and smoky effects. Chromered: needs lead glaze fired at cone 08 or below. Extremely toxic; not for functional ware.