Synthesis of Dielectric Ceramic Materials

Nanni, Paolo; Viviani, Massimo; Buscaglia, Vincenzo

doi:10.1016/b978-012513905-2/50011-x

Cited by 14 publications

(5 citation statements)

References 171 publications

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“…We obtained ε r (Al 2 O 3 ) = 9.3 ± 0.2, which is in agreement with the values obtained by Yota et al, ε r = 9.2 [ 33 ], and Biercuk et al, ε r = 9 [ 34 ], both results being from Al 2 O 3 produced by ALD, and also with the reference value for the dielectric constant of Al 2 O 3 [ 35 ].…”

Section: Methodssupporting

confidence: 91%

Mapping the local dielectric constant of a biological nanostructured system

Valeriano¹,

Andrade²,

Vasco³

et al. 2021

Beilstein J. Nanotechnol.

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The aim of this work is to determine the varying dielectric constant of a biological nanostructured system via electrostatic force microscopy (EFM) and to show how this method is useful to study natural photonic crystals. We mapped the dielectric constant of the cross section of the posterior wing of the damselfly Chalcopteryx rutilans with nanometric resolution. We obtained structural information on its constitutive nanolayers and the absolute values of their dielectric constant. By relating the measured profile of the static dielectric constant to the profile of the refractive index in the visible range, combined with optical reflectance measurements and simulation, we were able to describe the origin of the strongly iridescent wing colors of this Amazonian rainforest damselfly. The method we demonstrate here should be useful for the study of other biological nanostructured systems.

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Section: Methodssupporting

confidence: 91%

Mapping the local dielectric constant of a biological nanostructured system

Valeriano¹,

Andrade²,

Vasco³

et al. 2021

Beilstein J. Nanotechnol.

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show abstract

“…We obtained ( 2 3 ) = 9,3 ± 0,2, which is an agreement with the value obtained by Yota et al, = 9.2 [31], and Biercuk et al, = 9 [32], both results being from Al2O3 produced by ALD, and also with the reference value for the dielectric constant of Al2O3 reported in several handbooks [33].…”

Section: Al2o3 Reference Samplesupporting

confidence: 92%

Mapping the local dielectric constant of a bio‑nanostructured system

Valeriano¹,

Andrade²,

Vasco³

et al. 2020

Preprint

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The aim of this work is to determine the dielectric constant value of a bio-nanostructured system via Electrostatic Force Microscopy (EFM) and to show how this method is useful to study natural photonic crystals. We mapped the dielectric constant of the cross-section of the posterior wing of the damselfly Chalcopteryx rutilans with nanometric resolution and obtained not only structural information on its constitutive nanolayers but also on the absolute values of the dielectric constant variation in a nanometric scale. By relating the measured profile of the static dielectric constant to the profile of the refractive index in the visible range, combined with optical reflectance measurements and simulation, we were able to describe the origin of the strongly iridescent wing colors of this Amazonian rainforest damselfly. The method we demonstrate here should be useful for the study of other nanostructured biological systems.

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“…Intensive milling of BaTiO 3 in water to reduce particle size leads to leaching of Ba 2+ and a strong pH increase, which is detrimental for further processing. Several chemical routes have been proposed 5,6 to prepare fine and weakly agglomerated powders. However, most of these methods are more expensive than the solid‐state reaction and some of them have significant drawbacks.…”

Section: Introductionmentioning

confidence: 99%

Solid‐State Synthesis of Ultrafine BaTiO₃ Powders from Nanocrystalline BaCO₃ and TiO₂

Buscaglia

Bassoli

Buscaglia

et al. 2005

Journal of the American Ceramic Society

163

123

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Barium titanate has been prepared by solid-state reaction of nanocrystalline TiO 2 (70 nm) with BaCO 3 of different particle size (650, 140, and 50 nm). The results give evidence of a strong effect of the size of BaCO 3 in the solid-state synthesis of barium titanate. The use of nanocrystalline BaCO 3 already leads to formation of the single-phase BaTiO 3 after calcination for 8 h at 8001C. The final powder consists of primary particles of % 100 nm, has a narrow particle size distribution with d 50 5 270 nm, and no agglomerates larger than 800 nm. For the coarser carbonate, 4 h calcination at 10001C are required and the final powder is much coarser. Solid-state reaction of nanocrystalline BaCO 3 and TiO 2 represents an alternative to chemical preparation routes for the production of barium titanate ultrafine powders.

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Synthesis of Dielectric Ceramic Materials

Cited by 14 publications

References 171 publications

Mapping the local dielectric constant of a biological nanostructured system

Mapping the local dielectric constant of a biological nanostructured system

Mapping the local dielectric constant of a bio‑nanostructured system

Solid‐State Synthesis of Ultrafine BaTiO₃ Powders from Nanocrystalline BaCO₃ and TiO₂

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Synthesis of Dielectric Ceramic Materials

Cited by 14 publications

References 171 publications

Mapping the local dielectric constant of a biological nanostructured system

Mapping the local dielectric constant of a biological nanostructured system

Mapping the local dielectric constant of a bio‑nanostructured system

Solid‐State Synthesis of Ultrafine BaTiO3 Powders from Nanocrystalline BaCO3 and TiO2

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Solid‐State Synthesis of Ultrafine BaTiO₃ Powders from Nanocrystalline BaCO₃ and TiO₂