Enhancing NiZn ferrite properties through microwave sintering: A comparative study

IF 2.7 4区 材料科学 Q1 MATERIALS SCIENCE, CERAMICS
Carolina Clausell-Terol , Antonio Barba-Juan , Andres Mormeneo-Segarra , Piotr Putyra , Lucyna Jaworska
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Abstract

The structural, microstructural, morphological, and electromagnetic properties of a micro- and nanostructured nickel–zinc ferrite ((Cu0.12Ni0.23Zn0.65)Fe2O4) were studied after sintering between 900 and 1100 °C. The microparticulated ferrite (MICRO) was a commercial material, while the nanoparticulated ferrite (NANO) was obtained through high energy milling of the former. The effect of microwave heating (MW), compared to traditional infrared sintering (IR), was investigated.

Microwave sintering successfully controlled the grain growth of both granulometries and produced sintered bodies with high relative densities (low porosity), small average grain size, narrow grain size distribution, and a high value of the complex magnetic permeability-imaginary part (μ″) for the MICRO ferrite. In the case of the NANO ferrite, microwave sintering yielded values similar to those obtained by conventional IR.

Microwave sintering significantly affected the densification and grain growth processes for both granulometries studied. Additionally, reducing the granulometry of the starting ferrite powder had a noticeable impact on the microstructure and electromagnetic properties of the sintered ferrites, regardless of whether microwave or infrared radiation was used. However, the magnetic property (μ″) decreased when the particle size of the starting powder was reduced from micro to nanometric scale, irrespective of the sintering source. This observation is supported by our previously published mathematical models that establish relationships between the complex magnetic permeability, magnetization mechanisms, angular frequency, and ferrite microstructure.

通过微波烧结提高镍锌铁氧体性能:比较研究
研究了一种微观和纳米结构的镍锌铁氧体((Cu0.12Ni0.23Zn0.65)Fe2O4)在 900 至 1100 °C 烧结后的结构、微观结构、形态和电磁特性。微颗粒铁氧体(MICRO)是一种商用材料,而纳米颗粒铁氧体(NANO)则是通过对前者进行高能研磨获得的。与传统的红外烧结(IR)相比,微波加热(MW)的效果得到了研究。微波烧结成功地控制了两种粒度的晶粒生长,生产出的烧结体相对密度高(孔隙率低)、平均晶粒尺寸小、晶粒尺寸分布窄,并且 MICRO 铁氧体的复合磁导率-虚部(μ″)值高。微波烧结显著影响了所研究的两种粒度的致密化和晶粒生长过程。此外,无论使用微波还是红外辐射,降低初始铁氧体粉末的粒度都会对烧结铁氧体的微观结构和电磁特性产生明显影响。然而,当起始粉末的粒度从微米级减小到纳米级时,磁性能(μ″)会下降,与烧结源无关。我们之前公布的数学模型支持这一观察结果,这些模型建立了复合磁导率、磁化机制、角频率和铁氧体微观结构之间的关系。
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来源期刊
Boletin de la Sociedad Espanola de Ceramica y Vidrio
Boletin de la Sociedad Espanola de Ceramica y Vidrio 工程技术-材料科学:硅酸盐
CiteScore
5.50
自引率
2.90%
发文量
72
审稿时长
103 days
期刊介绍: The Journal of the Spanish Ceramic and Glass Society publishes scientific articles and communications describing original research and reviews relating to ceramic materials and glasses. The main interests are on novel generic science and technology establishing the relationships between synthesis, processing microstructure and properties of materials. Papers may deal with ceramics and glasses included in any of the conventional categories: structural, functional, traditional, composites and cultural heritage. The main objective of the Journal of the Spanish Ceramic and Glass Society is to sustain a high standard research quality by means of appropriate reviewing procedures.
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