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With InCl 3·4H 2O being used as raw materials, the precursor of nano sized In 2O 3 powder was prepared by hydrolysis, peptization and gelation of InCl 3·4H 2O. After calcination, nano sized In 2O 3 powder was obtained. The powder was characterized by thermo gravimetric and differential thermal analysis (TG DTA), X ray diffractometry (XRD) and transmission electron microscopy (TEM), respectively. Calculation revealed that the mean crystalline size increased with increasing the calcination temperature, but crystal lattice distortion rate decreased with the increasing in the average crystalline size. This indicated that the smaller the particle size, the bigger the crystal lattice distortion, the worse the crystal growing. The activation energies for growth of nano sized In 2O 3 were calculated to be 4.75 kJ·mol -1 at the calcination temperature up to 500℃ and 66.40 kJ·mol -1 at the calcination temperature over 600℃. TEM photos revealed that the addition of the chemical additive (OP-10) greatly influenced the morphology and size of In 2O 3 particles.
With InCl 3 · 4H 2O being used as raw materials, the precursor of nano sized In 2 O 3 powder was prepared by hydrolysis, peptization and gelation of InCl 3 · 4H 2O. After calcination, nano sized In 2 O 3 powder was obtained. The powder was characterized by thermo gravimetric and differential thermal analysis (TG DTA), X ray diffractometry (XRD) and respectively transmission electron microscopy (TEM), respectively. respectively. Calculations revealed that the mean crystalline size increased increased with calcination temperature, but crystal lattice distortion rate with the increasing in the average crystalline size. the indicated that the smaller the particle size, the bigger the crystal lattice distortion, the worse the crystal growing. The activation energies for growth of nano sized In 2O 3 were calculated to be 4.75 kJ · mol -1 at the calcination temperature up to 500 ° C and 66.40 kJ · mol -1 at the calcination temperature over 600 ° C TEM photos revealed that the addition of the chemical additive (OP-10) greatly influenced the morphology and size of In 2O 3 particles.