XRD and Laser Raman Spectroscopy Investigation of the Stability of Low Temperature t-ZrO_2

摘要

The influence of precipitation pH and the presence of Na~+ impuri- ties on the stability of metastable t-ZrO_2 phase content were crystallized nia samples with a high t-ZrO_2 phase content were crystallized form zirconium hydroxide precipitated at pH 13, 7 and 2.5. The ob- tained samples were subjected to the influence of temperature, pressure and γ-irradiation. The influence of these treatments on the metastable t-ZrO_2 were investigated using XRD and laser Ra- man spectroscopy. The results of phase analysis showed that the change in the pH of zirconium hydroxide precipitation significantly changed the sensitivity of the metastable t-ZrO_2 to temperature and pressure.