Formation of Lead Zirconate‐Lead Titanate Solid Solutions

Abstract

Formation of the Pb(Zr,Ti)Os solid solution in t h e system Pb0-TiOrZr02 was studied by chemical analysis and X-ray powder diffractometry. Only PbTiOs and Pb(Zr,Ti)03 were found as reaction products. The following three elementary reactions seemed to be reasonable for the formation of the Pb(Zr,Ti)03 phase: P b O + TiOz -+ PbTiOa, PbTiOs + PbO + ZrOz + Pb(Zrl-xTii)03, and Pb(Zrl-xTix)O3 + PbTiOo ---f P b ( Z r l -i~T i~~) 0 3 @<A').

Mechanochemical Synthesis of Piezoelectric PLZT Powder [Translated]^†

“…3 shows the XRD patterns obtained after heat treatment of mixed powder and MC powders at 773 K and 1073 K for 1 h. Treatment of the mixed powder at 773 K yielded no major XRD pattern change, but after treatment at 1073 K there was a mixture of a perovskite phase, PbTiO 3 phase, and pyrochlore phase. It is known that generally thermal synthesis yields PbTiO 3 , perovskite, and pyrochlore phases partway through the process, [12,13] and the abovedescribed results suggest the occurrence of the reactions typical to conventional thermal synthesis. But heat treatment of MC 3.6-ks powder at 773 K sharpened the peaks that were broad before heat treatment, and the diffraction pattern assumed a form close to that of the starting powder.…”

Preparation of spherical Pb(Zr, Ti)O3 powders by ultrasonic spray pyrolysis

“…Figs 2 and 3 show the XRD patterns of powders prepared at 700 and 800 ~ in air and at 600-800 ~ in O2, respectively. The powders synthesized in the air atmosphere showed the PZT phases with a minor PbTiO3 phase, and the amount of PbTiO3 phase decreased with increasing reaction temperature from 700~ to 800~ PbTiO3 has been reported as an intermediate phase frequently found during the solidstate reaction between PbO, ZrO 2 and TiO/ [16][17]. In addition, PbzTiOzO6 has also been reported as an intermediate product when PZT is formed by a sol-gel process [2].…”

From the Mining to the Obtaining of Ferroelectric Ceramics

“…Four stages [28,29] have been found for the case of ceramics type PZT. The selection of the reactants, grinding time and calcinations regimes is sustained on the experience obtained by previous studies [30,31].…”