Enhanced piezoelectric properties and thermal stability of Bi0.5Na0.5TiO3 modified BiFeO3BaTiO3 ceramics with morphotropic phase boundary

Shuai Cheng; Boping Zhang; Shengjie Ai; Hongbao Yu; Xin Wang; Jiahao Yang; Changrong Zhou; Jingtai Zhao; Guanghui Rao

Journal of Materiomics (May 2023)

Enhanced piezoelectric properties and thermal stability of Bi0.5Na0.5TiO3 modified BiFeO3BaTiO3 ceramics with morphotropic phase boundary

Shuai Cheng,
Boping Zhang,
Shengjie Ai,
Hongbao Yu,
Xin Wang,
Jiahao Yang,
Changrong Zhou,
Jingtai Zhao,
Guanghui Rao

Affiliations

Shuai Cheng: Guangxi Key Laboratory of Information Materials & School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin, 541004, China; Foshan (Southern China) Institute for New Materials, Foshan, 528200, Guangdong, China; School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, China
Boping Zhang: School of Materials Science and Engineering, University of Science and Technology Beijing, 100083, Beijing, China; Corresponding author.
Shengjie Ai: Guangxi Key Laboratory of Information Materials & School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin, 541004, China
Hongbao Yu: Guangxi Key Laboratory of Information Materials & School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin, 541004, China; Corresponding author.
Xin Wang: Guangxi Key Laboratory of Information Materials & School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin, 541004, China
Jiahao Yang: Guangxi Key Laboratory of Information Materials & School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin, 541004, China; Corresponding author.
Changrong Zhou: Guangxi Key Laboratory of Information Materials & School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin, 541004, China; Corresponding author.
Jingtai Zhao: Guangxi Key Laboratory of Information Materials & School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin, 541004, China
Guanghui Rao: Guangxi Key Laboratory of Information Materials & School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin, 541004, China; Corresponding author.

Journal volume & issue: Vol. 9, no. 3
pp. 464 – 471

Abstract

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Morphotropic phase boundary (MPB) plays a key role in tuning piezoelectric responses of ferroelectric ceramics. Here, Bi0·5Na0·5TiO3 modified BiFeO3BaTiO3 ternary solid solutions of 0.7BiFeO3-(0.3-x)BaTiO3-xBi0.5Na0·5TiO3 (referred to as BF-BT-xBNT, 0.00 ≤ x ≤ 0.04) were prepared for lead-free piezoelectrics. All the ceramics exhibit an MPB with coexisting rhombohedral (R) and tetragonal (T) phases, and the R/T phase ratio decreases upon increasing x. The increment of BNT promotes the grain growth, lowers the leakage current and Curie temperature (TC), and gradually drives the ferroelectric to relaxor transition. Because of the MPB with appropriate R/T phase ratio, increased grain size and density, and decreased leakage current, the well-balanced performance between d33 = 206 pC/N and TC = 488 °C is obtained in x = 0.01 case. In addition, the further enhanced in-situ d33 = 286–347 pC/N is obtained in BF-BT-xBNT ceramics along with the improved depolarization temperature Td from 280 to 312 °C, showing a potential application for lead-free piezoceramics at high temperature.

Published in Journal of Materiomics

ISSN: 2352-8478 (Print); 2352-8486 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.sciencedirect.com/journal/journal-of-materiomics

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