Influence of the synthesis conditions on the properties of hydrous zirconia and the stability of low-temperature t-ZrO2

Bottom-up/top-down synthesis of stable zirconium hydroxide nanophases

“…The sample obtained by the aged solution also shows peaks ascribable to NaCl (denoted by the arrows in the figure). The diffractogram of the freeze-dried sample was analyzed according to the Scherrer equation 32,33 by measuring the full width at half the maximum (FWHM) height of the peak at about 30 ; a crystallite size of 7.3 A was obtained, in good agreement with the dimension of primary units determined by SAXS. Samples treated at 300 C appear to retain the amorphous nature, indicating that at this calcination temperature both chemical and physical water can be removed without affecting the structure.…”

Synthesis, vacuum sintering and dielectric characterization of zirconia (t-ZrO2) nanopowder

“…For ZrO 2 nano crystals, three intense peaks centered at 420, 513, 758 cm −1 were observed, which is the characteristic band of the tetragonal ZrO 2 phase [25]. According to the available reports, observed bands at 420 and 513 cm −1 are attributed to the Zr-O stretching in tetragonal ZrO 2 [26,28]. Also the band at 758 cm −1 is the characteristic of Zr-O bending vibrations of ZrO 2 in ZrO ı , usually ı = 4 and 6, poly- hedron [27,28].…”

Synthesis of zirconium oxide nanoparticle by sol-gel technique

“…After that they calcined the sample at 400°C. They obtain tetragonal zirconia as the domonant phase after calcinations [2]. Stocker & Baiker have prepared zirconia aerogel by sol-gel method using tetra-n-butoxy zirconium (IV) and acid catalysis.…”