Thermalanalysis of pigments based on Bi2O3

The synthesis of new pigments based on Bi₂O₃ is investigated because they give interesting orange hues and can substitute the pigments problematic from the environmental point of view. Chemical compounds of the Bi_2–xZr_3x/4O₃ type were synthesized. The host lattice of these pigments is Bi₂O₃ that is doped by Zr⁴⁺ ions. The area of ZrO₂ solubility in Bi₂O₃ at 800°C forming solid solution of both oxides was studied. The incorporation of doped ions provides interesting colours and contributes to a growth of the thermal stability of these compounds. The simultaneous TG-DTA measurements were used for determination of the temperature region of the pigment formation and thermal stability of pigments.