Synthesis of a magneto electric fluid based on a core shell architecture of Cobalt ferrite and Barium Titanate

IF 5.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Materials Research Bulletin Pub Date : 2024-10-28 DOI:10.1016/j.materresbull.2024.113170

Keju Ren , Yiwen Ding , Chen Chen , Gang Meng , Huan Li , Guiyun Sun , Xiaoling Deng , Rongli Gao

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Abstract

In this paper, CoFe₂O₄ and CoFe₂O₄@BaTiO₃ (CFO@BTO) particles were prepared by hydrothermal method and sol-gel method, and the CFO@BTO multiferroic fluids with different surfactants were prepared by ball milling method, respectively. The stability, electric properties, and magnetoelectric coupling properties were investigated. From the XRD experimental results, the pure phase CFO@BTO composite particles were successfully prepared, and the HETEM images verified the core-shell structure. When the surfactant was 3-aminopropyltriethoxysilane, it had a good stability with a sedimentation rate of 4.6 % after 48 h From the dielectric constant as a function of frequency, the average value of the dielectric constant was 4.41. The saturated polarization strength was 8.33 nC/cm² and the residual polarization strength was 0.91 nC/cm² as shown in the hysteresis loop. In addition, it had a larger magnetodielectric coefficient (1.54 %) and magnetoelectric coupling coefficient (18.07 V/(cm·Oe)), which provide ideas to further enhance the magnetoelectric coupling effect.

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基于钴铁氧体和钛酸钡芯壳结构的磁电流体的合成

本文采用水热法和溶胶-凝胶法分别制备了CoFe2O4和CoFe2O4@BaTiO3（CFO@BTO）颗粒，并采用球磨法制备了含有不同表面活性剂的CFO@BTO多铁性流体。对其稳定性、电性能和磁电耦合性能进行了研究。从 XRD 实验结果来看，成功制备了纯相 CFO@BTO 复合粒子，HETEM 图像验证了其核壳结构。当表面活性剂为 3-aminopropyltriethoxysilane 时，其稳定性较好，48 h 后沉降率为 4.6 %。如磁滞回线所示，饱和极化强度为 8.33 nC/cm2，残余极化强度为 0.91 nC/cm2。此外，它还具有较大的磁介电系数（1.54 %）和磁电耦合系数（18.07 V/(cm-Oe)），这为进一步增强磁电耦合效应提供了思路。

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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.