Shift of morphotropic phase boundary in high-performance fine-grained PZN-PZT ceramics
Shift of morphotropic phase boundary in high-performance fine-grained PZN-PZT ceramics
复制标题
DOI：
10.1016/j.jeurceramsoc.2014.02.041
复制
发表时间：
2014-09
影响因子：
5.7
通讯作者：
Mupeng Zheng;Y. Hou;M. Zhu;Ming Zhang;Hui Yan
中科院分区：
文献类型：
--
作者：
Mupeng Zheng;Y. Hou;M. Zhu;Ming Zhang;Hui Yan
采用高能球磨法制备了xPb（Zn 1/3 Nb 2/3）O3-（1 −x）Pb（Zr0.47Ti0.53）O3系超细晶前驱体。PZN的加入导致晶粒尺寸从初始的微米级减小到亚微米级，并伴随着从四面体到准同型相界（MPB），然后菱形侧的相变。有趣的是，与先前公布的粗晶陶瓷的数据相比，由于细晶陶瓷的内应力的增强，MPB已经从50%PZN含量侧移动到30%PZN含量侧。提高的电学和力学性能与相结构和晶粒尺寸密切相关。结果表明，平均晶粒尺寸为0.65 μm的MPB 0.3PZN-0.7PZT陶瓷具有较高的压电性能（d33= 380 pC/N，kp = 0.49）和力学性能（Hv= 5.0 GPa，KIC = 1.33 MPa m1/2）。
The fine-grainedxPb(Zn1/3Nb2/3)O3–(1 −x)Pb(Zr0.47Ti0.53)O3system has been prepared from submicron precursor powders obtained by high-energy ball milling method. The addition of PZN induces a decrease of grain size from an initial micron scale to a submicron scale, accompanying with the phase transition from tetragonal to morphotropic phase boundary (MPB), and then rhombohedral side. Interestingly, compared to the former published data for coarse-grained ceramic, the MPB has shifted from 50% to 30% PZN content side due to the enhancement of the internal stress for fine-grained ceramic. The enhanced electrical and mechanical performances are closely associated with the phase structure and grain size. A high piezoelectric property (d33= 380 pC/N andkp= 0.49) as well as mechanical performance (Hv= 5.0 GPa andKIC= 1.33 MPa m1/2) were obtained simultaneously for the MPB 0.3PZN–0.7PZT ceramics with an average grain size of 0.65 μm.