3D mapping of anisotropic ferroelectric/dielectric composites

Lesseur, Julien; Bernard, Dominique; Chung, U‐Chan; Estournès, Claude; Maglione, Mario; Elissalde, Catherine

doi:10.1016/j.jeurceramsoc.2014.07.032

Cited by 12 publications

(8 citation statements)

References 24 publications

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“…This is both a confirmation of pre-existing phenomenological models and a first step towards a realistic modeling of such dielectric composites which usually require strong simplifying assumptions. 52 …”

Section: Multimaterials At the Microscalementioning

confidence: 99%

Innovative architectures in ferroelectric multi-materials: Chemistry, interfaces and strain

et al. 2015

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Breakthroughs can be expected in multi-component ceramics by adjusting the phase assembly and the micro-nanostructure. Controlling the architecture of multi-materials at different scales is still challenging and provides a great opportunity to broaden the range of functionalities in the field of ferroelectric-based ceramics. We used the potentialities of Spark Plasma Sintering (SPS) to control a number of key parameters regarding the properties: anisotropy, interfaces, grain size and strain effects. The flexibility of the wet and supercritical chemistry routes associated with the versatility of SPS allowed designing new ferroelectric composite ceramics at different scales. These approaches are illustrated through various examples based on our work on ferroelectric/dielectric composites.

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Section: Multimaterials At the Microscalementioning

confidence: 99%

Innovative architectures in ferroelectric multi-materials: Chemistry, interfaces and strain

et al. 2015

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“…It can be observed that in 2D approximation,

ε_{eff}

is underestimated by comparison with the 3D approach, but still it can be considered that a 2D simulation describes quite satisfactory the dependence of

ε_{eff}

on the dielectric component concentration as a trend. This difference concerning the estimation of

ε_{eff}

was also presented by J. Lesseur et al in a very recent study . However, the dependences of the tunability on the dielectric phase concentration present significant differences in the two approaches.…”

mentioning

confidence: 99%

Comment on “The Impact of Composite Effect on Dielectric Constant and Tunability in Ferroelectric‐Dielectric System”

Padurariu

Mitoşeriu

2016

J. Am. Ceram. Soc.

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A comparison between 2D and 3D Finite Element Method based simulations on the tunability properties of ferroelectric – linear dielectric composites is presented. Dependences of the effective permittivity and tunability on the concentration of the linear phases are presented and it is shown that there are important differences between the two approaches. The appropriateness of such simulations in describing realistic composite systems is discussed, too.

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“…We will focus on the core-shell approaches dedicated to the composite route that is particularly suitable not only to tailor the dielectric characteristics but also to generate new functionalities [6][7][8][9]. The major issue when designing tailor-made nanostructured ferroelectric materials is the control of the interfaces in a broad sense i.e.…”

Section: Methodsmentioning

confidence: 99%

“…Magnesium oxide was also widely used in ferroelectric/dielectric composites designed at the microand the nanoscale to decrease the dielectric losses while keeping moderate permittivity in the range 500-1000 [7,8,42]. Aiming once again a control of the dielectric phase at the grain scale, we successfully adapted an original method based on thermolysis process for an efficient coating on ferroelectric particles surface by a crystallized MgO shell [43].…”

Section: Magnesium Oxide Based Core-shell Nanocompositesmentioning

confidence: 99%

Specific core-shell approaches and related properties in nanostructured ferroelectric ceramics

et al. 2018

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Interfaces are a major issue when designing ferroelectric nanostructured materials with tailored properties. In a context of integration and multifunctionality in the field of electronics, several strategies have been developed to control the microstructure and defect chemistry of interfaces that strongly impact the macroscopic properties. The suitability of the core-shell approaches that allow a subtle tuning of interface phenomena at different scales has been widely demonstrated. We focus here on the flexibility of the core-shell approach devoted to the processing of nanostructured ferroelectric composites. Our strategy relies on the use of advanced synthesis processes to design ferroelectric grains coated with shells of different nature, morphology and crystallinity. Typical examples will be reviewed with a specific attention on their impact on both microstructure and dielectric properties. Our approach, based also on the use of fast sintering technique, provides a guidance to design 3D bulk nanostructured ferroelectrics while controlling and/or exploiting size, interface and defects chemistry. The contribution of specific spectroscopies to probe interfacial chemistry and defects is underlined. The high density of interfaces in core-shell materials is obviously an advantage to target additional functionality such as magneto-electric coupling. This is illustrated in 3D composites and one dimensional nanostructures that coaxially combine electric and magnetic materials. The core-shell approach described here could be transferred to a much broader range of materials covering many functionalities provided a deeper understanding of the interfaces at the atomic scale is achieved and a further development of low temperature processing is reached.

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3D mapping of anisotropic ferroelectric/dielectric composites

Cited by 12 publications

References 24 publications

Innovative architectures in ferroelectric multi-materials: Chemistry, interfaces and strain

Innovative architectures in ferroelectric multi-materials: Chemistry, interfaces and strain

Comment on “The Impact of Composite Effect on Dielectric Constant and Tunability in Ferroelectric‐Dielectric System”

Specific core-shell approaches and related properties in nanostructured ferroelectric ceramics

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