Preparation of single-crystal PbTiO3 nanorods by phase transformation from Pb2Ti2O6 nanorods

Single-crystal lead titanate perovskite dendrites derived from single-crystal lead titanate pyrochlore dendrites by phase transition at elevated temperature

“…In the present experiment Pb 2 Ti 2 O 6 pyrochlore transforms to PbTiO 3 perovskite at a very low temperature of 550 1C. Furthermore, due to the presence of a little PbTiO 3 perovskite in the hydrothermal Pb 2 Ti 2 O 6 pyrochlore dendrites the phase transition temperature becomes lower than the previously reported ones [30,31].…”

“…In our previous research works, single-crystal Pb 2 Ti 2 O 6 nanorods were synthesized by the hydrothermal reaction method without any alkali hydroxides. Furthermore, after an elevated temperature annealing treatment the single-crystal Pb 2 Ti 2 O 6 nanorods transform to single-crystal PbTiO 3 nanorods [31]. More recently, single-crystal Pb 2 Ti 2 O 6 dendrites were also prepared in our research works by the hydrothermal reaction route under the effect of dense ammonia [32].…”

“…Over the past decade, many chemical methods, such as sol-gel [26], coprecipitation [27], combined polymerization and pyrolysis of metallo-organic precursors [28], and hydrothermal routes [7,21,22,[29][30][31][32], have been developed to prepare PbTiO 3 powders with controlled physical and chemical characteristics. Among the methods, the hydrothermal technique is an aqueousbased precipitation route allowing control over the nucleation, growth, and aging processes.…”

“…Among the methods, the hydrothermal technique is an aqueousbased precipitation route allowing control over the nucleation, growth, and aging processes. Previous works have demonstrated that the hydrothermally synthesized lead titanate powders exhibit different crystal structures such as perovskite type [21,22], pyrochlore type [30][31][32][33], tetragonal body-centered type (also named as PX-phase) [21], and pre-perovskite type (named as Pre-PT in this paper hereafter) [7], and various morphologies (e.g. spherical, tabular, rod-shaped, tubular, and acicular), depending on the reaction conditions (e.g.…”

Phase-separation-induced self-assembly of controllable PbTiO3 nanodots on Si substrates

“…The incorporation of such PT nanoparticles into micron-sized PT matrix was found to be able to improve the dielectric properties [14]. Many other nanostructure forms of PT were also reported: PT nanorods were synthesized through phase transformation of precursor Pb 2 Ti 2 O 6 nanorods [15]; PT nanorods arrays were prepared through liquid-phase deposition with the aid of anodic aluminum oxide template [16]; PT nanotubes were prepared by sol-gel method [17] and hydrothermal synthesis [18].…”