Premium
Yttria totally stabilized zirconia nanoparticles obtained through the pyrosol method
Author(s) -
Vasile Bogdan S.,
Vasile Otilia R.,
Ghitulica Cristina,
Andronescu Ecaterina,
Dobranis Raluca,
Dinu Elena,
Trusca Roxana
Publication year - 2010
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200925623
Subject(s) - high resolution transmission electron microscopy , cubic zirconia , yttria stabilized zirconia , materials science , scanning electron microscope , transmission electron microscopy , crystallite , yttrium , analytical chemistry (journal) , chemical engineering , ceramic , nanoparticle , mineralogy , nanotechnology , composite material , chemistry , metallurgy , chromatography , engineering , oxide
Abstract In this work, 10 mol% yttria‐stabilized cubic zirconia is obtained through the pyrosol method, starting from diluted solutions of zirconyl (IV) nitrate hydrate (ZrO(NO 3 ) 2 ·6H 2 O) and yttrium (III) nitrate hexahydrate (Y(NO 3 ) 3 ·6H 2 O) in water. The main factors that are influencing the parameters of prepared powders are the concentration of starting solutions, soluble salts type, synthesis temperature, vibration frequency of the piezoelectric ceramics, etc. In the present paper, we investigated the influence of the concentration of starting solutions and of the thermal treatment temperature on the dimensions, morphology, and composition of powders. The methods of analysis used to characterize the obtained powders were X‐ray diffraction (XRD), scanning electron microscopy (SEM), atomic force microscopy, and transmission electron microscopy/high‐resolution transmission electron microscopy (TEM/HRTEM). The only crystallographic phase identified through XRD, for powders prepared at 800 °C and higher and for all concentrations, is cubic zirconia. From SEM images it was observed that there were obtained spherical particles with a medium size of approximately 85 nm. From TEM/HRTEM images it can be seen that the spherical particles are polycrystalline with nanocrystalites reaching a mean dimension of 4 nm.