Effect of the organic additions on crystal growth behavior of ZrO2 nanocrystals prepared via sol–gel process

Effect of Y2O3 addition on the phase composition and crystal growth behavior of YSZ nanocrystals prepared via coprecipitation process

“…4. It can be seen that those for crystal growth of samples kJ/mol) in the later stage [19]. Furthermore, activation energies for crystal growth are much lower than the experimental result for submicro-sized 3YSZ (580 kJ/mol) [31].…”

“…is that the amorphous phase is similar with tetragonal phase [19,23]. Besides, the broad and weak diffraction peaks imply fine grains and poor crystallinity for the YSZ powders.…”

“…The average crystallite size (D t ) of YSZ powders was determined from broadening of the diffraction line (101) of the tetragonal phase using the Scherrer equation (Eq. (1)) [18,19]:…”

Synthesis, luminescence and photocatalyst properties of zirconia nanosheets by modified Pechini method

“…Fig. 4.i,h illustrates the formation mixture of tetragonal and monoclinic phases, due to the existence of bands at 422, 575 and 732cm -1 are attributed monoclinic ZrO 2 phase, and the bands at 489, 444 cm -1 are associated with tetragonal ZrO 2 phase [47][48][49]. These mixtures of phase were obtained at calcination temperature of 490-550°C.…”

Photoluminescence quenching of Zirconia nanoparticle by surface modification

“…3(i)c that the tetragonal-to-monoclinic phase transformation almost goes to 70% after annealing at 850 • C. The phase transition from t-ZrO 2 to Table 1 The average particle size of as-synthesized ZrO2 nanoparticles, annealed 600 • C and 850 • C. [25]. The volume fraction of monoclinic phase (V m ) can be calculated using Toraya method [26].…”