Dielectric and energy storage properties of Bi2O3-B2O3-SiO2 doped Ba0.85Ca0.15Zr0.1Ti0.9O3 lead-free glass-ceramics

Yaohui Chen; Daihua Chen; Liufang Meng; Lingyu Wan; Huilu Yao; Junyi Zhai; Changlai Yuan; Devki N Talwar; Zhe Chuan Feng

doi:10.1098/rsos.191822

Dielectric and energy storage properties of Bi₂O₃-B₂O₃-SiO₂ doped Ba_0.85Ca_0.15Zr_0.1Ti_0.9O₃ lead-free glass-ceramics

R Soc Open Sci. 2020 Sep 16;7(9):191822. doi: 10.1098/rsos.191822. eCollection 2020 Sep.

Authors

Yaohui Chen^{1

2}, Daihua Chen¹, Liufang Meng³, Lingyu Wan¹, Huilu Yao¹, Junyi Zhai^{1

2}, Changlai Yuan³, Devki N Talwar⁴, Zhe Chuan Feng¹

Affiliations

¹ Center on Nanoenergy Research, Laboratory of Optoelectronic Materials and Detection Technology, Guangxi Key Laboratory for the Relativistic Astrophysics, School of Physical Science and Technology, Guangxi University, Nanning 530004, People's Republic of China.
² Beijing Key Laboratory of Micro-Nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, People's Republic of China.
³ College of Material Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, People's Republic of China.
⁴ Department of Physics, University of North Florida, Jacksonville, FL 32224, USA.

Abstract

A sol-gel method is employed for preparing high quality lead-free glass-ceramic samples (1 - x)BCZT-xBBS-incorporating Ba_0.85Ca_0.15Zr_0.1Ti_0.9O₃ (BCZT) powder and Bi₂O₃-B₂O₃-SiO₂ (BBS) glass-doped additives with different values of x (x = 0, 0.05, 0.1, 0.15). Systematic investigations are performed to comprehend the structural, dielectric and energy storage characteristics using X-ray diffraction, field-emission scanning electron microscopy, impedance and ferroelectric analyser methods. With appropriate BBS doping (x), many fundamental traits including breakdown strength, dielectric loss and energy storage density have shown significant improvements. Low doping-level samples x < 0.1 have retained the pure perovskite phase while a second glass phase appeared in samples with x ≥ 0.1. As the doping level (0.1 ≥ x > 0) is increased, the average grain size decreased to become better homogeneous materials with improved breakdown energy strengths. Excessive addition of BBS (x = 0.15) causes negative effects on microstructures and other traits. The glass-ceramic sample 0.95BCZT-0.05BBS exhibits excellent dielectric permittivity and temperature stability, with the highest energy storage density of 0.3907 J cm^-3 at 130 kV cm^-1. These results provide good reference to develop lead-free ceramics of high energy storage density.

Keywords: BCZT ceramics; Bi2O3-B2O3-SiO2 doping; energy storage density; sol–gel method.

Associated data

Dryad/10.5061/dryad.jsxksn06n