Thermodynamic evaluation and phase diagram of PbOTiO2 system

Thermodynamic Assessment of the PZT System

“…The Gibbs energy of both, tetragonal aPbTiO 3 and cubic bPbTiO 3 modifications are evaluated in the present work Table 5 . The thermodynamic properties of lead titanate differ significantly from those reported in the modelling work of Soh et al 3 based on the estimated values of heat capacity. Figure 4 shows the comparison of the calculated and experimentally measured heat capacity of lead titanate reported by Rossetti et al.…”

“…1 Experimental studies of the O-Pb-Zr and O-Pb-Ti systems are confined to the investigation of lead zirconate and lead titanate, and the quasi-binary systems PbO-ZrO 2 and PbO-TiO 2 . The modelling of quasibinary PbO-ZrO 2 and PbO-TiO 2 systems was done by Koo et al 2 and Soh et al, 3 respectively. Thermodynamic assessments of ZrO 2 -TiO 2 system were published by several authors.…”

Visible light photochemical activity of heterostructured PbTiO3–TiO2 core–shell particles

“…This observation is consistent with the PbO-TiO 2 phase diagram. 27 Compared with the diffraction pattern of TiO 2 , Pb-doped TiO 2 shows a small peak at 2y = 32.41, which is consistent with the most intense peak in the PbTiO 3 pattern, (110). This indicates that the doping exceeded the solubility limit of Pb in TiO 2 and that a small amount of the ternary compound was formed.…”

Crackling noise microscopy

“…Powder PbO and TiO 2 are then synthesized in a sealed quartz crucible (10 −6 mbar) by the solid-state reaction method for 48 h at 850° C in a horizontal muffle furnace. The purity of the synthesis of PbTiO 3 powder was verified by X-ray diffraction 42 , 43 and then put into a platinum crucible with additional PbO in molar ratios of 1:1 to 1:3. The crucible was covered to avoid PbO evaporation during crystal growth.…”