Enhancement of breakdown electric field and dielectric properties of CaCu3Ti4O12 ceramics by Sr doping

The substitution behavior and lattice parameter of barium titanate between solid_solubility with a dopant concentration in the range of 0.25 to 1.5 mol% are studied. The influences of dysprosium-doped fraction on the grain size and dielectric properties of barium titanate ceramic, including dielectric constant and breakdown electric field strength, are investigated via scanning electronic microscopy, X-ray diffraction and electric property tester. The results show that, at a dysprosium concentration of 0.75 mol%, the abnormal grain growth is inhibited and the lattice parameters of grain rise up to the maximum because of the lowest vacancy concentration. In addition, the finegrain and high density of barium titanate ceramic result in its excellent dielectric properties. The relative dielectric constant (25 °C) reaches to 4100. The temperature coefficient of the capacitance varies from -10 to 10% within the temperature range of -15 °C -100 °C, and the breakdown electric field strength (alternating current) achieves 3.2 kV/mm. These data suggest that our barium titanate could be used in the manufacture of high voltage ceramic capacitors.

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Separation and extraction of non-thermal effects of strong microwave electric field on dielectric properties of materials based on time modulation and cavity perturbation method

Review of Scientific Instruments ◽

10.1063/5.0037363 ◽

2021 ◽

Vol 92 (2) ◽

pp. 024712

Author(s):

Yong Gao ◽

En Li ◽

Weimin Shi ◽

Yunpeng Zhang ◽

Chong Gao ◽

...

Keyword(s):

Dielectric Properties ◽

Electric Field ◽

Perturbation Method ◽

Thermal Effects ◽

Time Modulation ◽

Cavity Perturbation ◽

Properties Of Materials

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The effect of nitrogen sparging on the long term stability of the breakdown electric field strength of a repetitively pulsed oil dielectric switch

2007 IEEE Pulsed Power Plasma Science Conference ◽

10.1109/ppps.2007.4652480 ◽

2007 ◽

Cited By ~ 1

Author(s):

P. Norgard ◽

R. D. Curry ◽

J. M. Turner

Keyword(s):

Field Strength ◽

Electric Field ◽

Electric Field Strength ◽

Term Stability ◽

Breakdown Electric Field ◽

Long Term Stability

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Effects of tissue dielectric properties on the electric field induced in tDCS: A sensitivity analysis

2012 Annual International Conference of the IEEE Engineering in Medicine and Biology Society ◽

10.1109/embc.2012.6346049 ◽

2012 ◽

Cited By ~ 7

Author(s):

R. Salvador ◽

F. Ramirez ◽

M. V'yacheslavovna ◽

P. C. Miranda

Keyword(s):

Sensitivity Analysis ◽

Dielectric Properties ◽

Electric Field

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Electrostatic Forces on Particles Floating Within the Interface Between Two Immiscible Fluids

Volume 8: Heat Transfer, Fluid Flows, and Thermal Systems, Parts A and B ◽

10.1115/imece2007-44095 ◽

2007 ◽

Author(s):

Nadine Aubry ◽

Pushpendra Singh

Keyword(s):

Dielectric Properties ◽

Field Strength ◽

Electric Field ◽

Electric Field Strength ◽

External Electric Field ◽

Capillary Force ◽

Electrostatic Force ◽

Immiscible Fluids ◽

Electrostatic Forces ◽

Dipole Interactions

The objective of this paper is to study the dependence of the electrostatic force that act on a particle within the interface between two immiscible fluids on the parameters such as the dielectric properties of the fluids and particles, the particle’s position within the interface, and the electric field strength. It is shown that the component of electrostatic force normal to the interface varies as a2, where a is the particle radius, and since in equilibrium it is balanced by the vertical capillary force, the interfacial deformation caused by the particle changes when an external electric field is applied. In addition, there are lateral electrostatic forces among the particles due to the dipole-dipole interactions which, when the distance between two particles is O(a), vary as a2, and remain significant for submicron sized particles.

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