Broadband high frequency impedance spectrometer with working temperatures up to 1200K

Kežionis, A.; Kazakevičius, E.; Салкус, Т.; Орлюкас, А.Ф.

doi:10.1016/j.ssi.2010.09.034

Cited by 45 publications

(23 citation statements)

References 7 publications

(7 reference statements)

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“…Investigation of electrical properties of LiFePO 4 /C samples was performed in nitrogen gas in the frequency range from 1 Hz to 5 MHz by a two-probe method (Solartron 1260 analyser). Investigation of electrical properties of LiFePO 4 was performed in air in the 1-1•10 6 Hz frequency range by two-and four-probe methods (as described in [11]), and the measurements in the frequency range of 3 • 10 5 -3•10 9 Hz were performed as described in [12].…”

Section: Methodsmentioning

confidence: 99%

SEM/EDX, XPS, and impedance spectroscopy of LiFePO4 and LiFePO4/C ceramics

Орлюкас

Fung²,

Venckutė

et al. 2014

Lith. J. Phys.

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The powders of LiFePO 4 compounds have been synthesized by the solid state reaction, and LiFePO 4 /C composites were sintered in argon gas. The ceramics of LiFePO 4 were sintered in air. The surfaces of the ceramics were investigated by a scanning electron microscope (SEM), energy dispersive X-ray spectrometer (EDX). The binding energies of the Fe 2p, P 2p, and O 1s core level of LiFePO 4 ceramic and LiFePO 4 /C composite surfaces were determined by X-ray photoelectron spectroscopy (XPS). The deconvolutions of Fe 2p core level XPS are associated with Fe 2+ and Fe 3+ valence states of the ceramics. Impedance spectroscopy of the ceramics has been performed in the frequency range of 10 Hz to 3 GHz by low frequency and microwave impedance spectrometers. Two-and four-probe methods were used for measurements at low frequencies. The LiFePO 4 /C composite was investigated in nitrogen gas, and the measurements of LiFePO 4 were conducted in air. The measurements of the electrical properties of the ceramics were carried out in the temperature interval of 300-500 K.

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Section: Methodsmentioning

confidence: 99%

SEM/EDX, XPS, and impedance spectroscopy of LiFePO4 and LiFePO4/C ceramics

Орлюкас

Fung²,

Venckutė

et al. 2014

Lith. J. Phys.

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“…The measurements in the microwave range (3·10 5 -3·10 9 Hz) were performed by an Agilent Network Analyzer E5062A connected to the coaxial line, and part of the inner conductor of the coaxial line was replaced by the sample. The impedance of the sample was calculated from scattering parameters of such network as in [19]. The temperature was changed in the range 300-700 K during the impedance spectroscopy experiments in the low and high frequency ranges and measured using a digital thermometer TMD90A.…”

Section: Methodsmentioning

confidence: 99%

Preparation, structure, surface and impedance analysis of Na₂Zn_0.5Mn_0.5P₂O₇ ceramics

Venckutė¹,

Dindune²,

Valdniece³

et al. 2017

Lith. J. Phys.

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The Na 2 Zn 0.5 Mn 0.5 P 2 O 7 powder was prepared by the solid state reaction method. The powder structure was studied by X-ray diffraction (XRD) in the temperature range from room temperature (RT) to 520 K. The results of XRD measurements show that the obtained Na 2 Zn 0.5 Mn 0.5 P 2 O 7 is a mixture of two phases: Na 2 MnP 2 O 7 , which crystallizes in the triclinic space group P -1, and Na 2 ZnP 2 O 7 , which crystallizes in the tetragonal space group P4 2 /mmm. The chemical compositions of the powder and ceramic samples were investigated by an energy dispersive X-ray spectrometer (EDX) and X-ray fluorescence spectroscopy (XFS). The surface of ceramics was examined by X-ray photoelectron spectroscopy (XPS). The electrical conductivity and dielectric permittivity of the ceramics were investigated from RT to 700 K in the frequency range 10-10 9 Hz. The relaxational dispersion of electrical conductivity in the investigated frequency and temperature range was found.

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“…Six alloys in the concentration range of x = 0.3-0.9 for (Ag 3 AsS 3 ) x (As 2 S 3 ) 1-x superionic glasses and composites were chosen for the study. Measurements of complex dielectric permittivity were carried out within the range of frequencies 10 Hz-3 GHz at room temperature by a coaxial impedance spectrometer set-up [15].…”

Section: Methodsmentioning

confidence: 99%

Dielectric permittivity of (Ag3AsS3)x(As2S3)1-x superionic glasses and composites

Studenyak¹,

Орлюкас²

2014

Semicond. Phys. Quantum Electron. Optoelectron.

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Abstract. Complex dielectric permittivity of (Ag 3 AsS 3 ) x (As 2 S 3 ) 1-x (x = 0.3−0.9) superionic glasses and composites at 300 K were studied. A decrease of the real part of dielectric permittivity with frequency by almost five orders of magnitude as well as one dispersion region in glasses and two dispersion regions in composites, which is reflected in the dielectric loss spectra, were observed. Frequency dependences of dielectric permittivity within the range from 10 Hz to 310 9 Hz were analyzed in the framework of the Cole-Cole model. Compositional behaviour of Cole-Cole parameters in (Ag 3 AsS 3 ) x (As 2 S 3 ) 1-x (x = 0.3−0.9) superionic glasses and composites was studied. The most substantial changes were observed with the transition from (Ag 3 AsS 3 ) 0.4 (As 2 S 3 ) 0.6 glass to (Ag 3 AsS 3 ) 0.5 (As 2 S 3 ) 0.5 composite and from (Ag 3 AsS 3 ) 0.6 (As 2 S 3 ) 0.4 composite to (Ag 3 AsS 3 ) 0.8 (As 2 S 3 ) 0.2 composite.

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Broadband high frequency impedance spectrometer with working temperatures up to 1200K

Cited by 45 publications

References 7 publications

SEM/EDX, XPS, and impedance spectroscopy of LiFePO<sub>4</sub> and LiFePO<sub>4</sub>/C ceramics

SEM/EDX, XPS, and impedance spectroscopy of LiFePO<sub>4</sub> and LiFePO<sub>4</sub>/C ceramics

Preparation, structure, surface and impedance analysis of Na₂Zn_0.5Mn_0.5P₂O₇ ceramics

Dielectric permittivity of (Ag3AsS3)x(As2S3)1-x superionic glasses and composites

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Broadband high frequency impedance spectrometer with working temperatures up to 1200K

Cited by 45 publications

References 7 publications

SEM/EDX, XPS, and impedance spectroscopy of LiFePO<sub>4</sub> and LiFePO<sub>4</sub>/C ceramics

SEM/EDX, XPS, and impedance spectroscopy of LiFePO<sub>4</sub> and LiFePO<sub>4</sub>/C ceramics

Preparation, structure, surface and impedance analysis of Na2Zn0.5Mn0.5P2O7 ceramics

Dielectric permittivity of (Ag3AsS3)x(As2S3)1-x superionic glasses and composites

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Preparation, structure, surface and impedance analysis of Na₂Zn_0.5Mn_0.5P₂O₇ ceramics