Restraining quenching-induced decline of resistivity in NBT-BFO ceramics by incorporation of BiAlO3

IF 5.1 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS Ceramics International Pub Date : 2024-07-07 DOI:10.1016/j.ceramint.2024.07.079

Jiaxin Wang, Pengrong Ren, Jiao Yang, Guohui Wang

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Abstract

(1-x)Na_0.5Bi_0.5TiO₃-xBiFeO₃ (NBT-BFO) is a system with a composition-induced transition from relaxor to ferroelectric. Upon quenching, 0.4NBT-0.6BFO obtain a T_d of 640 °C and d₃₃ of 56 pC/N. However, the quenching treatment also causes the reduction of resistivity, which is unfavorable for high-temperature piezoelectric ceramics. The aim of this study is to restrain quenching-induced decline of resistance in NBT-BFO ceramics by doping a small amount of BiAlO₃ (BA). For unquenched NBT-BFO-BA, with increasing BA content, the piezoelectric coefficient (d₃₃) decreases slightly, while the resistivity increases. After quenching, both d₃₃ and the depolarization temperature (T_d) increase, but more importantly, the resistivity of quenched NBT-BFO-BA is comparable with that of the unquenched samples. This phenomenon is not observed in other quenched samples, and the reason is attributed to the defect dipoles caused by BA. Besides, the enhanced piezoelectric properties and the resistivity can be retained after annealing the quenched samples at 400 °C for 4 h. Thus, this work implies the potential application of NBT-BFO based piezoelectric ceramics at elevated temperatures.

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通过加入 BiAlO3 抑制 NBT-BFO 陶瓷中由淬火引起的电阻率下降

(1-x)Na0.5Bi0.5TiO3-xBiFeO3（NBT-BFO）是一种由成分诱导的从弛豫到铁电转换的体系。淬火后，0.4NBT-0.6BFO 的 Td 为 640 ℃，d33 为 56 pC/N。然而，淬火处理也会导致电阻率降低，这对高温压电陶瓷是不利的。本研究的目的是通过掺杂少量的 BiAlO3 (BA)，抑制 NBT-BFO 陶瓷中由淬火引起的电阻率下降。对于未淬火的 NBT-BFO-BA，随着 BA 含量的增加，压电系数（d33）略有下降，而电阻率则有所增加。淬火后，d33 和去极化温度（Td）都会升高，但更重要的是，淬火 NBT-BFO-BA 的电阻率与未淬火样品相当。这种现象在其他淬火样品中没有观察到，原因是 BA 产生了缺陷偶极子。此外，淬火样品在 400 ℃ 退火 4 小时后，其增强的压电特性和电阻率仍能保持。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Ceramics International 工程技术-材料科学：硅酸盐

CiteScore

9.40

自引率

15.40%

发文量

4558

审稿时长

25 days

期刊介绍： Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties. Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour. Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.