Synthesis of ZrO2 and TiO2 nanocrystalline powders by hydrothermal processстатья
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Дата последнего поиска статьи во внешних источниках: 12 октября 2013 г.
Аннотация:In present work, nanocrystalline zirconia and titania were synthesized by hydrothermal treatment of zirconyl ZrO(NO3)2 and titanyl
TiO(NO3)2 nitrates aqueous solutions and amorphous gels of the corresponding hydroxides. The hydrothermal synthesis was performed in a
wide range of temperatures (150–250 jC), concentration of starting solutions (0.25–0.5 M) and duration of the process (from 10 min to up
to 24 h). The hydrothermal treatment at high pressure about 2.0–4.0 GPa was also carried out. The products were characterized by X-ray
powder diffraction (XRD), transmission electron microscopy (TEM) and BET. Particle sizes, morphology and properties of the products were
investigated. The influence of hydrothermal synthesis conditions on ZrO2 and TiO2 phase compositions were established.