Effects of Zr/Ti Ratio on Phase Formation and Dielectric Properties of 0.8Pb(ZrxTi1-x)O-3-0.2Pb(Co1/3Nb2/3)O-3 Ceramics

作者：Prasatkhetragarn A^*; Ketsuwan P; Unruan M; Ngamjarurojana A; Laosiritaworn Y; Ananta S; Yimnirun R; Cann D P

来源：Ferroelectrics, 2009, 380(1): 122-129.

DOI：10.1080/00150190902876355

• PZT-PCN
• MPB
• Zr/Ti ratio
• Dielectric properties
• Phase formation

The 0.8Pb(ZrxTi1-x)O-3-Pb-0.2(Co1/3Nb2/3)O-3, [0.8PZT-0.2PCN] ceramics are expected to display excellent dielectric properties in compositions close to the morphotropic phase boundary (MPB). The influence of Zr/Ti ratio on phase formation and dielectric properties of the 0.8Pb(ZrxTi1-x)O-3-Pb-0.2(Co1/ 3Nb2/3)O-3 ceramics have been investigated in order to identify the morphotropic phase boundary ( MPB) composition in this system. With XRD analysis, the crystal structure of dense specimens appeared to change gradually from tetragonal to rhombohedral with increasing Zr content. The dielectric properties measurements showed a maximum dielectric constant at x = 0.50 +/- 0.01, while the transition temperature decreased with increasing Zr content in the system. Moreover, all ceramics showed diffused phase transition behaviors with a minimum diffusivity at x = 0.50 +/- 0.01. These results clearly showed the significance of Zr/Ti ratio in controlling the electrical properties of the PZT-PCN ceramic system.

• 出版日期2009