High dielectric constants in BaTiO3 doped 90V2O5−10Bi2O3 oxide glasses obeying Debye-type dielectric relaxation behavior

BaTiO3 doped 90V2O5−10Bi2O3 (VB) oxide glasses show a larger dielectric constant (102-104) compared to that of the base glass VB (∼102). The VB glass with 15 wt.% BaTiO3 shows the largest dielectric constant, and all the glasses show a Debye-type dielectric relaxation behavior. The increase in dielectric constant appears to be mainly due to the formation of microcrystalline clusters of BaTiO3 (1.8–8 μm, depending on the BaTiO3 concentration present in the base glass). Other than the dilution effect with BaTiO3, the glass-former oxide Bi2O3 also influences the dielectric behavior of BaTiO3 doped VB glasses.

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Dielectric Relaxation Properties in Colossal Dielectric Constant Material Sr0.9Ba0.1Ti0.9Ru0.1O3

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.298.23 ◽

2011 ◽

Vol 298 ◽

pp. 23-28 ◽

Cited By ~ 1

Author(s):

Tong Wei ◽

Qing Jun Zhou ◽

Qing Gong Song ◽

Chuan Zhen Zhao ◽

Jun Ming Liu

Keyword(s):

Dielectric Constant ◽

Dielectric Relaxation ◽

Relaxation Behavior ◽

Color Centers ◽

Complex Perovskite ◽

Impedance Analyzer ◽

Clear Link ◽

Dielectric Relaxation Behavior ◽

Colossal Dielectric Constant ◽

Dielectric Relaxation Properties

We investigated the colossal dielectric constant behavior and interesting dielectric relaxation over broad temperature and frequency ranges in complex perovskite Sr0.9Ba0.1Ti0.9Ru0.1O3 ceramics by using HP4294 impedance analyzer. Through the discussion, there exists a clear link between the dielectric relaxation and the sample conductivity. It’s believed that hopping of electrons between color centers not only produce conductivity but also give rise to dielectric relaxation behavior.

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Investigating the dielectric properties of barium titanate nanocomposites using transmission electron microscopy image processing

MRS Advances ◽

10.1557/s43580-021-00095-0 ◽

2021 ◽

Author(s):

Gio Ferro ◽

Dithi Ganjam ◽

Maia Gibson ◽

Katie Partington ◽

Akshay Trikha ◽

...

Keyword(s):

Image Processing ◽

Dielectric Constant ◽

Energy Storage ◽

Barium Titanate ◽

Computational Models ◽

Transmission Electron Microscopy Image ◽

Dielectric Behavior ◽

Dielectric Constants ◽

Transmission Electron ◽

High Dielectric

AbstractBarium titanate (BTO) is a ferroelectric perovskite material used in energy storage applications because of its high dielectric constant. A previous study showed that the dielectric constant for BTO nanoparticles drastically increases to over 15,000 at a particle size of 70 nm. This result is highly contested, but its implications to energy storage motivated our investigation into the dielectric constants of BTO nanoparticles that are incorporated into a polymer matrix. We developed a novel method of using image processing techniques on transmission electron microscope images of BTO-polymer nanocomposites. Data on the positions, shapes, sizes, and orientations of BTO nanoparticles were used to build more realistic computational models that simulate the dielectric behavior of the nanocomposites. Here, we investigate the relationship between regions of enhanced electric field and the composite dielectric constant.

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