It is pale yellow, a solid with a density of about 9.32 grams per cubic centimeter. Above 710 degrees, the material takes on its second form, which is pseudocubic, bright yellow to deep orange with a density of 9.04 grams per cubic centimeter. This latter form is prepared by introducing oxygen at 800 degrees, melts at 820 degrees and is stable to about 1750 degrees. Impurities are sometimes introduced, in the cubic form, as silicon is retained. Bismuth trioxide can be prepared in one of several ways.
Bismuth trioxide is insoluble in water.
It dissolves in acids to form salts. It can form any number of different oxides when combined with oxides of calcium, cadmium, lead, barium and other elements. Aside from easier handling and energy savings, the lower temperatures allow the use of cheaper components. If you believe you have a use for bismuth trioxide, contact us. We will be happy to discuss and help you implement your application.