Shi Yunjing, Bai Hairui, Yan Fei, Hu Rui, Chen Kaikai, Shen Bo, Zhai Jiwei
Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education, Functional Materials Research Laboratory, School of Materials Science &Engineering, Tongji University, 4800 Caoan Road, Shanghai 201804, China.
Dalton Trans. 2020 May 7;49(17):5573-5580. doi: 10.1039/c9dt04664j. Epub 2020 Apr 9.
Here, (1 -x)BiFe(ZnHf)O-xBaTiO + 1 mol% MnO (x = 0.225, 0.250, 0.265, 0.275, 0.285, and 0.300) (BFZH-xBT) ceramics were synthesized using a traditional ceramic sintering technique. A morphotropic phase boundary (MPB) consisting of rhombohedral (R) and tetragonal (T) phases was formed in the BFZH-xBT ceramics when x = 0.285. The suitable content of BT was conducive to enlarge the particle size, improve ferroelectric and piezoelectric properties, and reduce the leakage current density. For the optimal component at x = 0.285, we observed the largest grain size, a lowest leakage current density value of ∼1.93 × 10 A cm, minimum content of oxygen vacancies, high temperature of 478 °C and the highest piezoelectric coefficient (d) of 130 pC N.
在此，采用传统陶瓷烧结技术合成了(1 -x)BiFe(ZnHf)O-xBaTiO + 1 mol% MnO（x = 0.225、0.250、0.265、0.275、0.285和0.300）（BFZH-xBT）陶瓷。当x = 0.285时，在BFZH-xBT陶瓷中形成了由菱方（R）相和四方（T）相组成的准同型相界（MPB）。适量的BT含量有利于增大晶粒尺寸、改善铁电和压电性能并降低漏电流密度。对于x = 0.285的最佳组分，我们观察到最大的晶粒尺寸、约1.93×10 A cm的最低漏电流密度值、最小的氧空位含量、478℃的高温以及130 pC N的最高压电系数（d）。
