BNT-based ceramics with large strain and low hysteresis over a wide temperature range

IF 14.3 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Science & Technology Pub Date : 2025-04-02 DOI:10.1016/j.jmst.2025.02.044

Gensheng Dong, Xiujuan Lin, Qi Li, Yaoting Zhao, Hang Luo, Dou Zhang, Changhong Yang, Shifeng Huang

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Abstract

The incompatibility between large electro-strain and low-strain hysteresis, in addition to the poor temperature stability of piezoelectric ceramics, limits the development of high-precision piezoelectric actuators. In this work, Bi_0.465Na_0.465Ba_0.07Ti₁₋₂_xGa_xSb_xO₃ (abbreviated as BNBT7-xGS, x = 0, 0.01, 0.02, 0.03, 0.04, and 0.06) ceramics were designed. Specifically, when x = 0.02, the ceramics exhibit a critical state in the relaxor ferroelectric system with a typical relaxor P−E loop and an I−E curve of four peaks. At this composition, the room temperature strain is 0.4 %, which is capable of enhancing the electro-strain and reducing the hysteresis simultaneously. Furthermore, over the wide temperature range from 30 to 180°C, the minimum strain hysteresis (H_ys) is 7.13 %, and the maximum strain variation is only 16.8 %, demonstrating ultra-high temperature stability. This work introduces a model for addressing the dilemma between good electro-strain properties and insufficient temperature stability in lead-free piezoelectric ceramics, crucial for the development of modern high-precision actuators.

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在宽温度范围内具有大应变和低滞后的 BNT 基陶瓷

大电应变和低应变迟滞之间的不相容，加上压电陶瓷的温度稳定性差，限制了高精度压电执行器的发展。在这项工作中，设计了Bi0.465Na0.465Ba0.07Ti1−2xGaxSbxO3（缩写为BNBT7-xGS， x = 0,0.01,0.02,0.03,0.04和0.06）陶瓷。具体来说，当x = 0.02时，陶瓷处于弛豫铁电系统的临界状态，具有典型的弛豫P−E环和四峰I−E曲线。在该成分下，室温应变为0.4%，能够同时提高电应变和减小磁滞。此外，在30 ~ 180℃的温度范围内，最小应变迟滞（Hys）为7.13%，最大应变变化仅为16.8%，表现出超高温稳定性。这项工作引入了一个模型来解决无铅压电陶瓷良好的电应变性能和不够的温度稳定性之间的困境，这对现代高精度执行器的发展至关重要。

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来源期刊

Journal of Materials Science & Technology 工程技术-材料科学：综合

CiteScore

20.00

自引率

11.00%

发文量

995

审稿时长

13 days

期刊介绍： Journal of Materials Science & Technology strives to promote global collaboration in the field of materials science and technology. It primarily publishes original research papers, invited review articles, letters, research notes, and summaries of scientific achievements. The journal covers a wide range of materials science and technology topics, including metallic materials, inorganic nonmetallic materials, and composite materials.