Effects on structure and properties of BCZT lead-free piezoelectric ceramics by rare-earth doping. (25th January 2017)

• Record Type: Journal Article
• Authors: Shi, Jing; Lu, Xiaoyu; Shao, Jiahu; Fang, Bijun; Zhang, Shuai; Du, Qingbo; Ding, Jianning; Zhao, Xiangyong; Luo, Haosu
• Is Part Of: Ferroelectrics. Volume 507(2017)
• Page Start: 186
• Page End: 197
• Publication Date: 2017-01-25
• Subjects: BCZT lead-free piezoelectric ceramics -- rare-earth doping -- perovskite structure -- electrical properties -- fluorescent property; Ferroelectricity -- Periodicals; Ferroelectric crystals -- Periodicals; 537
• DOI: 10.1080/00150193.2017.1283941
• Languages: English
• ISSNs: 0015-0193

Abstract

ABSTRACT: 1 mol% rare-earth element doped [(Ba0.85 Ca0.15 )0.99 Re0.01 ](Zr0.1 Ti0.9 )O3 (BCZT-Re, Re = La, Sm, Yb, Eu and Er) lead-free piezoelectric ceramics were prepared by the conventional ceramic processing using high-purity carbonates and oxides as raw materials. The BCZT-Re ceramics sintered at 1450°C exhibit pure rhombohedral perovskite structure approaching the morphotropic phase boundary (MPB) composition accompanied by different relative density and grain size distribution. The dielectric behavior of the BCZT-Re ceramics approaches normal ferroelectrics but with slightly broad dielectric response peaks, and can be fitted well by the Curie-Weiss law above the Curie temperature TC but in a limited temperature range. Besides the La doping, the other BCZT-Re ceramics present symmetric and saturated P-E hysteresis loops, in which the BCZT-Eu ceramics exhibit apparently large values of polarization remnant Pr and coercive field Ec . The Pr and Ec values decrease rapidly around 80–90°C, depending on compositions, in the BCZT-Re ceramics, determining their safe use temperatures. Excellent fluorescence performance with different photoluminescence emission intensity and light color is induced by the rare-earth doping in the BCZT-Re ceramics, which can meet the requirements of the multifunctional applications using the ferroelectric-based materials.