Enhancement in dielectric, ferroelectric, and piezoelectric properties of BaTiO3- modified Bi0.5(Na0.4K0.1)TiO3 lead-free ceramics

被引：0

作者：

Vuong, Le Dai ^{[1
]}

Gio, Phan Dinh ^{[2
]}

机构：

[1] Hue Industrial College, Viet Nam

[2] University of Sciences, Hue University, Viet Nam

来源：

Journal of Alloys and Compounds | 2021年 / 817卷

关键词：

In this paper; the effect of BaTiO3 on dielectric; ferroelectric; and piezoelectric properties was observed in (1-x)[Bi0.5(Na0.4K0.1)TiO3] – xBaTiO3 ceramics (BNKT-BT; with x = 0; 0.01; 0.02; 0.03 and 0.04). The phase formation and microstructure of BNKT-BT ceramics were examined by X-ray diffraction (XRD); the Raman scattering spectra; and scanning electron microscopy (SEM). A pure perovskite phase was observed in the ceramic samples; proving the dissolution of BaTiO3 into the lattice structure of the BNKT to form a homogeneous solid solution (x ≤ 0.04). At x = 0.02; the best physical properties of the BNKT-BT ceramics; such as density; ρ = 5.86 g/cm3 (98.5% of the theoretical density); electromechanical coupling factors (kp); 0.30; (kt); 0.31; remanent polarization (Pr); 17.2 μC cm−2; dielectric constant (Εr); 1354; and highest dielectric constant (Εmax); 4037; were obtained. Further; the energy storage properties of 0.98Bi0.5(Na0.4K0.1)TiO3 – 0.02BaTiO3 ceramics were studied and compared with the textured ceramics (the same composition); which were formed due to the high degree of orientation obtained by the template grain growth method. The textured ceramics showed lower remnant polarization; while the piezoelectric coefficient (d31) and electromechanical coupling coefficients (kp and kt) of the textured ceramics were found to increase by about 8%; 13.3%; and; 19.4%; respectively. © 2019 Elsevier B.V;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

引用