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Dielectric permittivity

ESTIMATING DIELECTRIC PERMITTIVITY AND ELECTRIC CONDUCTIVITY FROM SIMULATED MULTICHANNEL GPR PULSES USING ACO AND QUASI-NEWTON INVERSION TECHNIQUES

ESTIMATING DIELECTRIC PERMITTIVITY AND ELECTRIC CONDUCTIVITY FROM SIMULATED MULTICHANNEL GPR PULSES USING ACO AND QUASI-NEWTON INVERSION TECHNIQUES

... both dielectric permittivity (ε) and electric conductivity (σ) properties simultaneously is presented in this ...the dielectric permittivity and electric conductivity from synthetic ...

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art aflalmeida dielectric permittivity

art aflalmeida dielectric permittivity

... ceramic were studied by X-ray powder diffraction, infrared and Raman scattering spectroscopy. After 30 h of milling the formation of CCTO was con®rmed by X- ray powder diffraction. The infrared and Raman scattering ...

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Mat. Res.  vol.7 número2

Mat. Res. vol.7 número2

... above dielectric relaxation phenom- enon may be attributed to the ferroelectric domain walls vibrations in such a king of ...the dielectric per- mittivity becomes equal to the static dielectric ...

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art aflalmeida Dielectric

art aflalmeida Dielectric

... The dielectric measurements were obtained from a HP 4291A Material Impedance Analyzer in conjunction with a HP 4194 Impedance Analyzer, which jointly cover the region of 100 Hz to ...the dielectric mea- ...

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Electromagnetic characterization of microwave sintered Sr1-xCaxMnO3 (0.0 ≤ x ≤ 0.4) thick films

Electromagnetic characterization of microwave sintered Sr1-xCaxMnO3 (0.0 ≤ x ≤ 0.4) thick films

... complex dielectric permittivity and magnetic permeability indi- cates that the absorption can be ascribed to the mag- netic and dielectric ...microwave permittivity of the Sr 1-x Ca x MnO 3 ...

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Mat. Res.  vol.6 número2

Mat. Res. vol.6 número2

... and dielectric properties of the bulk are correlated to actuating of a conduction mecha- nism of the hopping type expected to NTC ...and dielectric permittivity proper- ties, in the temperature range ...

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J. Braz. Chem. Soc.  vol.26 número2

J. Braz. Chem. Soc. vol.26 número2

... the dielectric materials. It was found that dielectric permittivity of all polyesteramide copolymers measured at lower frequency is always greater than higher ...of dielectric ...

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Broadband dielectric response of AlN ceramic composites

Broadband dielectric response of AlN ceramic composites

... Previous experiments [2] revealed a beneficial effect of addition of large cations to AlN ceramics. Thus, ti- tanium cations can possess a strong positive influence on the mechanical and electrical properties of ...

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Mat. Res.  vol.16 número5

Mat. Res. vol.16 número5

... the permittivity values decreased for higher frequencies characterizing a conductive ...relative dielectric constant at 100 KHz is shown for the PFW-PT ...maximum dielectric permittivity, ...

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Dielectric Properties of Nanosized ZnFe2O4

Dielectric Properties of Nanosized ZnFe2O4

... that dielectric per- mittivity of investigated samples decreases, while con- ductivity increases with increasing ...of dielectric permittivity is more pronounced, than at higher frequencies ...

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Mat. Res.  vol.16 número5

Mat. Res. vol.16 número5

... different loss mechanisms with the frequency increase. When the frequency is relatively low (below GHz), the losses are determined mainly by the conductance and are independent of the frequency. Conversely, in ...

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J. Microw. Optoelectron. Electromagn. Appl.  vol.16 número3

J. Microw. Optoelectron. Electromagn. Appl. vol.16 número3

... The dielectric permittivity of soil, needed in order to carry out simulations during the design process, is measured and analytically represented by Debye relaxation ...the dielectric ...

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art aflalmeida dielectric properties

art aflalmeida dielectric properties

... the dielectric permittivity (K) and loss (D) in the medium-frequency (MF) range (100 Hz–1 MHz), of the ...the dielectric constant and structural properties of the films are ...high dielectric ...

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Effect of oxidizing and reducing atmospheres on Ba(Ti0.90 Zr0.10)O3:2V ceramics as characterized by piezoresponse force microscopy

Effect of oxidizing and reducing atmospheres on Ba(Ti0.90 Zr0.10)O3:2V ceramics as characterized by piezoresponse force microscopy

... the dielectric loss was observed at elevated temperatures, vanadium doping stabilizes this ...reduced dielectric loss at elevated temperatures relecting that good insulation resistance was maintained at ...

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Mat. Res.  vol.20 número5

Mat. Res. vol.20 número5

... the dielectric and microwave properties of natural rubber based ...of dielectric permittivity and dielectric loss angle tangent, as well as on the microwave properties of the studied ...

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Dielectric properties of bismuth titanate ceramics containing SiO2 and Nd2O3 as additives

Dielectric properties of bismuth titanate ceramics containing SiO2 and Nd2O3 as additives

... conductivity, dielectric losses and relative permittivity are obtained depending on the ...are dielectric materials with conductivity between 10 -9 and 10 -13 (Ω·cm) -1 at room temperature, ...

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Dielectric properties of soft chemical method derived CaCu3Ti4O12 thin films onto Pt/TiO2/Si(100) substrates

Dielectric properties of soft chemical method derived CaCu3Ti4O12 thin films onto Pt/TiO2/Si(100) substrates

... most dielectric materials, the dielectric loss and leakage current density are related to the free ...The dielectric loss comes from two mechanisms [36]: the resistive loss and the relaxation loss of ...

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Influence of rare-earth additives (La, Sm and Dy) on the microstructure and dielectric properties of doped BaTiO3 ceramics

Influence of rare-earth additives (La, Sm and Dy) on the microstructure and dielectric properties of doped BaTiO3 ceramics

... in dielectric permittivity from room to nearly Curie temperature and nearly flat and stable permittivity response of dielectric constant were observed for samples with higher dopant amount ...

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Effects of the postannealing atmosphere on the dielectric properties of (Ba, Sr)TiO3 capacitors: Evidence of an interfacial space charge layer

Effects of the postannealing atmosphere on the dielectric properties of (Ba, Sr)TiO3 capacitors: Evidence of an interfacial space charge layer

... Figure 2 shows the influence of postannealing under dif- ferent atmospheres on the dissipation factor (tan d ) as a func- tion of frequency for BST films. These curves showed a distinctly visible characteristic peak ...

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J. Microw. Optoelectron. Electromagn. Appl.  vol.16 número1

J. Microw. Optoelectron. Electromagn. Appl. vol.16 número1

... comparing the standing wave pattern of the partially sample-filled waveguide and that of a short- terminated air-filled waveguide it is possible to determine the permittivity. Such method is known as SCTL ...

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