Influence of the Substitution of Iron by Aluminum and Titanium on the Structure and Properties of Barium Hexaferrite

IF 1.2 4区化学 Q4 CHEMISTRY, INORGANIC & NUCLEAR

Journal of Structural Chemistry Pub Date : 2024-07-09 DOI:10.1134/s002247662406009x

I. A. Solizoda, V. E. Zhivulin, S. A. Gudkova, S. V. Taskaev, N. S. Zabeivorota, L. A. Pesin, D. A. Vinnik

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Abstract

Ionic substitution is considered to be an effective approach to modify functional characteristics of hexagonal ferrites. To this aim, solid solutions with iso- and aliovalent substitution of iron by aluminum and titanium, respectively, are prepared by the solid-phase synthesis. The influence of the Al³⁺–Ti⁴⁺ substitution on the structure and properties of BaFe_12–xAl_xO₁₉, BaFe_12–yTi_yO₁₉ is studied. The prepared solid solutions are studied by scanning electron microscopy and X-ray microanalysis, powder XRD, vibration magnetometry, and differential scanning calorimetry. The crystal structure data confirm that the synthesized samples are characterized by the hexagonal phase, the P63/mmc space group. The samples are shown to consist of 1-10 µm flat hexagonal crystals. The influence of substitution on their magnetic properties is determined. The substitution of Fe³⁺ magnetic ions by Al³⁺ and Ti⁴⁺ ions decreased the Curie point of the solid solutions. Since magnetic characteristics can be tuned by introducing Al³⁺ and Ti⁴⁺, this effect can be used to control the optimization of magnetic characteristics in BaFe_12–xAl_xO₁₉, BaFe_12–yTi_yO₁₉ solutions to solve applied problems.

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铝和钛取代铁对六铁钡结构和性质的影响

摘要离子取代被认为是改变六方铁氧体功能特性的有效方法。为此，采用固相合成法制备了铝和钛分别取代铁的等价和离价固溶体。研究了 Al3+-Ti4+ 取代对 BaFe12-xAlxO19 和 BaFe12-yTiyO19 结构和性质的影响。通过扫描电子显微镜和 X 射线显微分析、粉末 XRD、振动磁力仪和差示扫描量热法对制备的固溶体进行了研究。晶体结构数据证实，合成的样品具有六方相的特征，空间群为 P63/mmc。样品由 1-10 微米的扁平六方晶体组成。替代物对磁性能的影响已经确定。用 Al3+ 和 Ti4+ 离子取代 Fe3+ 磁性离子会降低固溶体的居里点。由于可以通过引入 Al3+ 和 Ti4+ 来调整磁特性，因此可以利用这种效应来控制 BaFe12-xAlxO19 和 BaFe12-yTiyO19 溶液中磁特性的优化，从而解决应用问题。

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来源期刊

Journal of Structural Chemistry 化学-无机化学与核化学

CiteScore

1.60

自引率

12.50%

发文量

142

审稿时长

8.3 months

期刊介绍： Journal is an interdisciplinary publication covering all aspects of structural chemistry, including the theory of molecular structure and chemical bond; the use of physical methods to study the electronic and spatial structure of chemical species; structural features of liquids, solutions, surfaces, supramolecular systems, nano- and solid materials; and the crystal structure of solids.