The system zirconia−praseodymia (Pr content 0−15 mol %) has been investigated to evaluate the praseodymium solubility and its role in the zirconia phase stability. The powders have been synthesized by coprecipitation and subsequent calcination at different temperatures (400−1000 °C) for 2 h. The crystal structure of the obtained nanocrystalline (Zr, Pr)O 2 powders has been studied by X-ray diffraction. By applying the Rietveld method, the dopant effect on the zirconia phase stability was found and discrimination between the different zirconia polymorphs was possible.
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Corradi et al. (2001) studied this question.
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