Influence of Cr2O3 on the stability of low temperature t-ZrO2
作者： G Štefanić , S Popović , S Musić
DOI: 10.1016/S0167-577X(98)00040-8
关键词: Mineralogy 、 Chemical stability 、 Cubic zirconia 、 Metastability 、 Oxygen 、 Analytical chemistry 、 Aqueous solution 、 Solubility 、 Solid solution 、 Powder diffraction 、 Materials science
摘要: Abstract Aqueous solutions containing different molar fractions of Cr(NO 3 ) ·9H 2 O and ZrO(NO ·2H salts were dried at 110°C for 24 h calcinated up to 1100°C. Precise X-ray powder diffraction measurements the obtained samples, covering whole concentration range in system ZrO –Cr , performed. It was found that solubility Cr as well negligible. Except end identified pure m -ZrO other samples contained phases metastable t . The fraction phase total content ( + increased with an increase initial but this relation not linear. observed stabilization could be attributed formation a solid solution. suggested room temperature resulted from very strong surface interaction between chromium oxide zirconia. This prevented diffusion oxygen atmosphere into lattice, which otherwise triggers transition → on cooling.
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