Enhanced piezoelectric response of Na0.5Bi0.5TiO3-BaTiO3 lead free ceramics by tuning the local polar heterogeneity

IF 5.7 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Materials Research Bulletin Pub Date : 2024-11-27 DOI:10.1016/j.materresbull.2024.113231

Pan Chen , Bin Yuan , Jiachen Wang , Xin Zhang , Yaoguang Chen , Fengjiao Cao , Haojie Zhao , Yanquan Wang , Xiaohui Yuan , Zhongming Hu , Haojie Lian , Feng Zhu , Pei Li , Leilei Chen

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Abstract

For (1-x)Na_0.5Bi_0.5TiO₃-xBaTiO₃ (NBT-BT) ceramics, the highest piezoelectric performances appears at morphotropic phase boundary (x=0.06∼0.10). Recently, quenching has been as an effective way to improve their piezoelectric performances. In this work, comparative study on normally cooled and quenched NBT-BT ceramics was conducted. We found, there is a close positive correlation between electrical properties and local polar heterogeneity. It was verified in a case study on NBBT6 ceramics by tuning the local polar heterogeneity using Bi or Sr nonstoichiometric modification. And the highest d₃₃ ∼ 207 pC/N is obtained in Bi-modified NBT-BT ceramics. It demonstrates that, to obtain a higher d₃₃, the factors affecting local polar heterogeneity of piezoelectric ceramics could be preferentially considered.

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通过调节局部极性非均质性增强Na0.5Bi0.5TiO3-BaTiO3无铅陶瓷的压电响应

对于（1-x）Na0.5Bi0.5TiO3-xBaTiO3 （NBT-BT）陶瓷，最高的压电性能出现在相变相边界（x=0.06 ~ 0.10）。近年来，淬火已成为提高其压电性能的有效方法。本文对常冷和淬火NBT-BT陶瓷进行了对比研究。我们发现，电学性质与局部极性异质性之间存在密切的正相关关系。以NBBT6陶瓷为例，通过Bi或Sr非化学计量修饰调整其局部极性非均质性，验证了该方法的有效性。在bi改性的NBT-BT陶瓷中，得到了最高的d33 ~ 207 pC/N。结果表明，为了获得更高的d33，可以优先考虑影响压电陶瓷局部极性非均质性的因素。

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来源期刊

Materials Research Bulletin 工程技术-材料科学：综合

CiteScore

9.80

自引率

5.60%

发文量

372

审稿时长

42 days

期刊介绍： Materials Research Bulletin is an international journal reporting high-impact research on processing-structure-property relationships in functional materials and nanomaterials with interesting electronic, magnetic, optical, thermal, mechanical or catalytic properties. Papers purely on thermodynamics or theoretical calculations (e.g., density functional theory) do not fall within the scope of the journal unless they also demonstrate a clear link to physical properties. Topics covered include functional materials (e.g., dielectrics, pyroelectrics, piezoelectrics, ferroelectrics, relaxors, thermoelectrics, etc.); electrochemistry and solid-state ionics (e.g., photovoltaics, batteries, sensors, and fuel cells); nanomaterials, graphene, and nanocomposites; luminescence and photocatalysis; crystal-structure and defect-structure analysis; novel electronics; non-crystalline solids; flexible electronics; protein-material interactions; and polymeric ion-exchange membranes.