Composition-structure-properties dependences in solid solutions on the basis of lead-zirconate-titanate and sodium niobate

Investigation of La-doped 0.25Pb(Zn1/3Nb2/3)O3-0.75Pb(ZrxTi1-x)O3 ceramics near morphotropic phase boundary

“…8 The P-E curve and S 33 -E curve of specimen with Zr/Ti053/47 reduces the dielectric losses. This result agrees with many reports [8,16,18,19] and was explained as polarization causes domain reorientation along one direction. And as observed in some researches [18,19], the dielectric losses show an increase tendency with the increase of the Zr/Ti ratio.…”

“…When Zr/Ti ratio is less than 57/43, the dielectric constants of the poled specimens are greater than those of the depoled specimens, whereas it is the opposite at Zr/Ti0 57/43. According to Fesenko [16], Z.Xinhua [17] et al , in the tetragonal phase, polarization will relieve the clamping effect of the 180°domains, and thus the dielectric constant increases, While in the rhombohedral phase, the dielectric constant decreases due to the reorientation of the 90°d omains after poling and the obvious dielectric anisotropy of monodomain crystal. That means that the reversal of 180°d omains will increase the permittivity , whereas the turn of 90°domains will reduce the permittivity.…”

Structure and piezoelectric characteristics of (0.90-x)BiScO3-xPbTiO3-0.10Pb(Mn1/3Ta2/3)O3 system

“…Similarly, for the rhombohedral-rich composition, the 90° domains dominate after poling. 14) In tetragonal-rich composition, dielectric constant in contrast with unpoled specimens increases due to the relieving the clamping effect; and in rhombohedral-rich one, the dielectric constant decreases because of the clamping effect from 90° domains. Figure 5 shows the composition dependence of piezoelectric constant (d33) and electromechanical coupling factor (kp) of BS-PT-PMT ceramics.…”

Effect of Bi2O3 addition and sintering time on the physical and electrical properties of lead-free (Na0.5Bi0.5)TiO3-Ba(Zr0.04Ti0.96)O3 ceramics

“…The reasons of displacement of maximum K T 33 into tetragonal phase can be explained by Fesenko et al 14) The planar coupling factor (kp) and thickness coupling factor (kt) of (1-x)NBT-xBZT ceramic are shown as function of BZT composition and sintering time in Fig. 4 and Fig.…”