Samples of zirconium oxide doped with titanium oxide or cadmium oxide, prepared as a divided state, were examined to investigate the effect of the foreign ions on the zirconia phase transition. Thermal treatments (1173 K in H-2 for TiO2-ZrO2; 1073 K in air for CdO-ZrO2) caused the incorporation of titanium or cadmium in solid solution in the zirconia structure (tetragonal or cubic metastable phases). The solid solution formation hindered the tetragonal --> monoclinic transformation that takes place in undoped ZrO2 during the cooling step.
Metastable phase formation in the TiO2-ZrO2 and CdO-ZrO2 systems
Roberto Dragone
1997
Abstract
Samples of zirconium oxide doped with titanium oxide or cadmium oxide, prepared as a divided state, were examined to investigate the effect of the foreign ions on the zirconia phase transition. Thermal treatments (1173 K in H-2 for TiO2-ZrO2; 1073 K in air for CdO-ZrO2) caused the incorporation of titanium or cadmium in solid solution in the zirconia structure (tetragonal or cubic metastable phases). The solid solution formation hindered the tetragonal --> monoclinic transformation that takes place in undoped ZrO2 during the cooling step.File in questo prodotto:
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