“…In order to produce Y 2 O 3 -stabilized zirconia with homogeneous distribution, sol -gel processes or coprecipitation have been adopted, based on the hydrolysis of stoichiometric mixtures of zirconyl chloride and yttrium trichloride (see, e.g., Carter et al , 2009 ). The hydroxides formed are subsequently subjected to aceotropic distillation, drying, calcining between 850 and 950 ° C, wet milling, and spray -drying.…”