Enhanced ferroelectric properties derived at low voltages in manganese and cobalt Co-doped lead-free BNT-based films

IF 2.3 4区材料科学 Q2 MATERIALS SCIENCE, CERAMICS

International Journal of Applied Ceramic Technology Pub Date : 2025-05-28 DOI:10.1111/ijac.15190

Yuou Yuan, Hengchang Nie, Zhiyan Guo, Jinghui Peng, Biao He, Genshui Wang, Shiguang Yan, Fanglin Du, Liang Shi, Xiaofei Qu, Shuai Zhang

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引用次数: 0

Abstract

Ferroelectric thin films have emerged as a research focus in recent years due to their outstanding performance and eco-friendliness. This study reports on the fabrication of high-quality 0.55Bi_0.5Na_0.5TiO₃-0.45SrTiO₃+0.5 mol% Mn+x mol% Co (BNT-ST-Mn-x%Co) thin films on LaNiO₃/Si (100) substrates using the sol–gel and spin–coating techniques. Through comprehensive structural analysis using multiple techniques, including X-ray diffraction, scanning electron microscopy, and X-ray photoelectron spectroscopy, we demonstrate that cobalt incorporation enhances both the breakdown strength and relaxation properties of these films. Notably, the BNT-ST-Mn-1%Co film exhibits exceptional characteristics, achieving a maximum polarization of 73.62 µC/cm² under an electric field of 900 kV/cm, coupled with a dielectric constant of 1119 at 1 kHz. The co-doping of cobalt and manganese yields films with high polarization intensity even at lower electric fields, showcasing promising potential for a wide range of applications.

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低电压下锰钴共掺杂无铅bnt基薄膜的铁电性能增强

铁电薄膜以其优异的性能和生态友好性成为近年来研究的热点。采用溶胶-凝胶和旋涂技术在LaNiO3/Si（100）衬底上制备了高质量的0.55Bi0.5Na0.5TiO3-0.45SrTiO3+0.5 mol% Mn+x mol% Co （BNT-ST-Mn-x%Co）薄膜。通过x射线衍射、扫描电子显微镜和x射线光电子能谱等多种技术的综合结构分析，我们证明钴的掺入提高了这些薄膜的击穿强度和弛豫性能。值得注意的是，BNT-ST-Mn-1%Co薄膜表现出优异的特性，在900 kV/cm的电场下实现了73.62µC/cm2的最大极化，外加1 kHz时的介电常数为1119。钴和锰的共掺杂即使在较低的电场下也能产生高极化强度的薄膜，具有广泛的应用前景。

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来源期刊

International Journal of Applied Ceramic Technology 工程技术-材料科学：硅酸盐

CiteScore

3.90

自引率

9.50%

发文量

280

审稿时长

4.5 months

期刊介绍： The International Journal of Applied Ceramic Technology publishes cutting edge applied research and development work focused on commercialization of engineered ceramics, products and processes. The publication also explores the barriers to commercialization, design and testing, environmental health issues, international standardization activities, databases, and cost models. Designed to get high quality information to end-users quickly, the peer process is led by an editorial board of experts from industry, government, and universities. Each issue focuses on a high-interest, high-impact topic plus includes a range of papers detailing applications of ceramics. Papers on all aspects of applied ceramics are welcome including those in the following areas: Nanotechnology applications; Ceramic Armor; Ceramic and Technology for Energy Applications (e.g., Fuel Cells, Batteries, Solar, Thermoelectric, and HT Superconductors); Ceramic Matrix Composites; Functional Materials; Thermal and Environmental Barrier Coatings; Bioceramic Applications; Green Manufacturing; Ceramic Processing; Glass Technology; Fiber optics; Ceramics in Environmental Applications; Ceramics in Electronic, Photonic and Magnetic Applications;