Effect of 1.5 Weight Percent Nb sub 2 O sub 5 on the FE sub 1 -FE sub 2 Phase Transition in the High PbZrO sub 3 Region of the System PbZrO sub 3 -PbTiO sub 3

摘要

High Zr exp 4+ -containing Pb(Zr,Ti)O sub 3 (PZT) ceramic samples, doped with approximately 1.5 weight percent Nb sub 2 O sub 5 , were prepared and tested to determine the effect of the dopant on the FE sub 1 -FE sub 2 phase boundary and other selected properties. Data from the seven compositions studied indicate the following effects of 1.5 weight percent Nb sub 2 O sub 5 dopant (versus PZT with no niobia): Increases the FE sub 1 -FE sub 2 transition temperature (approximately 30 exp 0 C for PZT 93/7*); increases the hydrostatic depoling pressure required to cause the ferroelectric-to-antiferroelectric transition (by more than 30,000 lb/in exp 2 for PZT 95/5); increases the remanent polarization (by approximately 15 mu C/cm exp 2 for PZT 93/7) and decreases the coercive field (by approximately 1 kV/in. of sample thickness for PZT); and increases the piezoelectric coefficient d sub 33 (by approximately 14 x 10 exp -12 Coulomb/Newton for PZT 93/7). 38 figures, 12 tables. (ERA citation 08:036469)