  The aim of this article is to decrease the crystallization temperature of the
tetragonal perovskite PbTiO3 nanopowders below the PbTiO3 Curie temperature. At
the beginning of our study, the calcination temperature was selected based on
the thermal analysis of the PbTiO3 gels, came out at 680{\deg}C. However,
reconsidering the thermal properties of the PbTiO3 gel revealed the possibility
of the formation of single tetragonal perovskite phase at lower temperatures.
Both X-Ray diffraction and transmission electron microscopy investigations
showed that well crystalline pure phase PbTiO3 nanopowders have been
synthesized after calcination of the PbTiO3 gel at 460{\deg}C, which is quite
to the Curie temperature of the PbTiO3 nanoparticles. To improve
crystallization of the samples prepared at 460{\deg}C, the effect of the heat
treatment parameters and Pb content on gel crystallization and the
Pb-partitioning phenomenon (section 3.2) were investigated in detail.
