Optimization of artificial multifunctional K0.5Na0.5NbO3–CoFe2O4 ceramics

IF 5.8 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society Pub Date : 2025-06-12 DOI:10.1016/j.jeurceramsoc.2025.117620

Hadi Issa , Kevin Nadaud , Virgile Trannoy , Sarah Dine , Damien Brault , Yousra Mazloum , Vinh Ta Phuoc , Micka Bah , Fabien Giovannelli , Frédéric Schoenstein , Silvana Mercone , Isabelle Monot-Laffez

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引用次数: 0

Abstract

Lead and rare earth-free (1-x)

K_{0.5} {Na}_{0.5} Nb O_{3}

– (x)

Co {Fe}_{2} O_{4}

composites (where x = 0.05, 0.10 and 0.20), consisting of ferroelectric

K_{0.5} {Na}_{0.5} Nb O_{3}

(KNN) matrix and ferromagnetic

Co {Fe}_{2} O_{4}

(CFO) nano-inclusions, were densified via spark plasma sintering (SPS) to develop multifunctional materials. X-ray diffraction (XRD) confirmed the absence of secondary phases. High resolution scanning electron microscopy (HR-SEM) revealed dense microstructures, with increasing CFO grain size at higher CFO content. Energy dispersive X-ray spectroscopy (EDS) mapping and scattered scanning near-field optical microscopy (s-SNOM) confirmed CFO distribution in KNN matrix. Ferroelectric hysteresis loops demonstrated ferroelectricity in all composites. Dielectric measurements showed relaxation behavior with increasing losses for higher CFO content. Magnetic analysis at room temperature indicated a dominant ferromagnetic behavior, with superparamagnetic and diamagnetic contributions from CFO and KNN, respectively. Our complete full knowledge studies functionalities will be helpful to build ceramics architectures suitable for magneto-electric properties.

查看原文本刊更多论文

人造多功能K0.5Na0.5NbO3-CoFe2O4陶瓷的优化

采用火花等离子烧结（SPS）技术制备了由铁电性K0.5Na0.5NbO3 （KNN）基体和铁磁性CoFe2O4 （CFO）纳米包体组成的无铅（1-x）K0.5Na0.5NbO3 - (x)CoFe2O4复合材料（x = 0.05, 0.10和0.20），制备了多功能材料。x射线衍射（XRD）证实了不存在二次相。高分辨率扫描电镜（HR-SEM）显示，随着CFO含量的增加，CFO的晶粒尺寸逐渐增大。能量色散x射线能谱（EDS）和散射扫描近场光学显微镜（s-SNOM）证实了CFO在KNN矩阵中的分布。铁电磁滞回线在所有复合材料中均表现出铁电性。当CFO含量较高时，介电测量显示出随损耗增加而增加的弛豫行为。室温下的磁性分析表明，其主要表现为铁磁性，CFO和KNN分别具有超顺磁性和抗磁性。我们完整完整的知识研究功能将有助于构建适合磁电特性的陶瓷结构。

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

Journal of The European Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

10.70

自引率

12.30%

发文量

863

审稿时长

35 days

期刊介绍： The Journal of the European Ceramic Society publishes the results of original research and reviews relating to ceramic materials. Papers of either an experimental or theoretical character will be welcomed on a fully international basis. The emphasis is on novel generic science concerning the relationships between processing, microstructure and properties of polycrystalline ceramics consolidated at high temperature. Papers may relate to any of the conventional categories of ceramic: structural, functional, traditional or composite. The central objective is to sustain a high standard of research quality by means of appropriate reviewing procedures.