Equivalent Circuit and AC conductivity of Sr1.75Co0.25P2O7 compound

2016 ◽  
pp. 3551-3556
Author(s):  
Adel Souissi ◽  
S. Guermazi
Keyword(s):  
Solid State ◽  
Impedance Spectroscopy ◽  
Grain Boundary ◽  
Equivalent Circuit ◽  
Ac Conductivity ◽  
Solid State Reaction Method ◽  
Impedance Spectra ◽  
Reaction Method ◽  
Olpt Model ◽  
Approximation Type

Sr1.75Co0.25P2O7 compound was prepared by the solid-state reaction method. The impedance spectroscopy measurements were performed in the frequency and the temperature range of (209 Hz–1 MHz) and (622–704 K), respectively. Besides, the impedance spectra were fitted to an equivalent circuit consisting of series combination of grains and grain boundary. The AC conductivity for grain contribution is interpreted using the universal Jonscher’s power law. The approximation type OLPT model explains the universal behavior of the s exponent. The mechanism of conduction is probably due from the displacements of the Sr2+ ion in the tunnel-type cavities.

Structural, Electrical and FT-IR Studies of Nano Zn1-xCaxO by Solid State Reaction Method

2014 ◽  
Vol 938 ◽  
pp. 63-70 ◽  
Author(s):  
Tanushree Das ◽  
Bikram Keshari Das ◽  
Kajal Parashar ◽  
S.K.S. Parashar ◽  
Rao Alluri Nagamalleswara
Keyword(s):  
Solid State ◽  
Electrical Properties ◽  
Impedance Spectroscopy ◽  
Solid State Reaction ◽  
Ac Conductivity ◽  
Solid State Reaction Method ◽  
Reaction Method ◽  
Temperature Range ◽  
Ceramic Samples ◽  
Ft Ir

Single phase polycrystalline with = 0, 0.01 and 0.02 were synthesized by conventional solid state reaction method. The X-ray diffraction shows that the ceramic samples has hexagonal Wurtzite structure with a space group of p63mc and average crystallite size in the range 52 - 88 nm. The dielectric and electrical properties were studied within the temperature range 30 °C to 500 °C under air atmosphere as function of frequency (10 kHz). The electrical properties of grain interior and grain boundary have been studied by using the impedance spectroscopy and follow the non-Debye relaxation process. It was observed that the AC conductivity of ceramic samples following the Universal power law within the frequency range 1kHz to 1 MHz. The activation energy of Pure is 0.29 eV was calculated by using the Arrhenius-relation with in temperature range 300 - 500 °C, which is increased to (0.40 eV ) when = 0.02 of at 10 kHz . The peaks attributed at 1415 cm-1 () and 1413 cm-1 () in FT-IR measurement of are due to Ca-O stretching from the calcite phase of CaCO3, which is not observed in Pure ZnO confirms the presence of Ca in ZnO lattice. Keywords: , FT-IR, Impedance spectroscopy, ac conductivity, Dielectric constant.

Dielectric Properties of Zr-Doped CaCu3Ti4O12 Ceramics

2008 ◽  
Vol 368-372 ◽  
pp. 129-131
Author(s):  
Yong He ◽  
Ke Pi Chen ◽  
Dong Yu Liu ◽  
Zong De Liu
Keyword(s):  
Dielectric Constant ◽  
Dielectric Properties ◽  
Solid State ◽  
Impedance Spectroscopy ◽  
Solid State Reaction ◽  
Solid State Reaction Method ◽  
Conventional Solid State Reaction ◽  
Obvious Effect ◽  
Reaction Method ◽  
Microstructure Characteristic

CaCu3(Ti1-xZrx)O12 ceramics (x = 0.02, 0.04, 0.06, 0.08) were prepared by the conventional solid-state reaction method. Phase compositions, microstructure and dielectric properties were examined by XRD, SEM and impedance spectroscopy, respectively. The experimental results indicated that there is no obvious effect on microstructure characteristic by substituting Zr4+ for Ti4+. It was found that the values of the dielectric constant for all of the samples dropped into the order of 102, which is significantly lower than the order of 105 that of normally reported in the literature. It was suggested that the presence of impurity phases played an important role for the degeneracy of dielectric properties.

scholarly journals Structural, dielectric and conductivity studies of LiNi0.75Mg0.25-xCuxPO4 synthesized by solid state reaction method

2016 ◽  
Vol 10 (1) ◽  
pp. 47-55 ◽  
Author(s):  
Kotamalige Anand ◽  
Bhajanthri Ramamurthy ◽  
Valaparla Veeraiah ◽  
Kannipamula Babu
Keyword(s):  
Solid State ◽  
Impedance Spectroscopy ◽  
Solid State Reaction ◽  
Complex Impedance ◽  
Solid State Reaction Method ◽  
X Ray Diffraction ◽  
Reaction Method ◽  
Different Temperatures ◽  
Impedance Spectroscopy Technique ◽  
Ftir Technique

The olivine structured LiNi0.75Mg0.25-xCuxPO4 (x = 0, 0.05 and 0.1) cathode materials were synthesized by solid state reaction method. The XRD, FTIR and FESEM studies were conducted to investigate the phase purity, crystal structure, lattice parameters and morphology, respectively. The powder X-ray diffraction studies confirmed the single phase formation of the pure and doped compounds which are found to be orthorhombic with the parent LiNiPO4. Morphology and grain sizes of the materials were investigated through FESEM. The FTIR technique was used to characterize the stretching and bending vibrational modes of different functional groups existing in the materials. The cathode properties were analysed through impedance spectroscopy and indicated on improved electrical properties of the doped samples as compared to the pure LiNiPO4. The conductivity and modulus analyses of the samples were carried out at different temperatures and frequencies using the complex impedance spectroscopy technique.

Influence of Sintering Temperature on the Electrochemical Performance of Sm0.5-XGdxSr0.5Co 3-δ/Gd0.1Ce0.9O1.95 Composite Cathode

2011 ◽  
Vol 239-242 ◽  
pp. 1613-1616
Author(s):  
Ji Min Zhai ◽  
Xi Wen Song ◽  
Fen Zhou ◽  
Sheng Li An
Keyword(s):  
Solid State ◽  
Impedance Spectroscopy ◽  
Sintering Temperature ◽  
Perovskite Phase ◽  
Solid State Reaction Method ◽  
Composite Cathode ◽  
Reaction Method ◽  
Composite Cathodes ◽  
Different Temperatures ◽  
Alternative Current

In this paper, Sm0.5-xGdxSr0.5CoO3-δ(SGSC, x=0 and 0.2) powders were prepared using the solid-state reaction method. Their structure was identified by XRD. All powders formed the perovskite phase when calcined at 1100°C for 5 h. Sm0.3Gd0.2Sr0.5CoO3-δ/Gd0.1Ce0.9O1.95slurrieswere screen printed onto both surfaces of Gd0.1Ce0.9O1.95electrolyte and fired at different temperatures to fabricate the composite cathodes. The electrochemical property of the composite cathodes was characterized by the alternative current impedance spectroscopy. The impedance resistance of the composite cathodes increased with the increase of sintering temperature. For instance, the impedance resistance of the composite cathode fired at 1000 °C was 0.0875 Ω·cm2at 700 °C, while it was 0.175 Ω·cm2when fired at 1100 °C.

Application of Impedance Spectroscopy for Bi1−xNdxFeO3 Ceramics Characterization

2012 ◽  
Vol 730-732 ◽  
pp. 71-75
Author(s):  
Beata Wodecka-Dus ◽  
Jolanta Dzik ◽  
Henryk Bernard ◽  
Katarzyna Osinska ◽  
Agata Lisińska-Czekaj ◽  
...  
Keyword(s):  
Solid State ◽  
Impedance Spectroscopy ◽  
Solid State Reaction ◽  
Room Temperature ◽  
Single Phase ◽  
Solid State Reaction Method ◽  
Frequency Range ◽  
Reaction Method ◽  
Synthesis Conditions

In the present paper the synthesis conditions for fabrication of Bi1−xNdxFeO3ceramics are reported. The single phase polycrystalline samples of Bi1−xNdxFeO3 were prepared by standard solid state reaction method from the mixture of oxides viz.: Bi2O3, Fe2O3and Nd2O3. The samples were characterized by impedance spectroscopy in the frequency range 10Hz – 1MHz at room temperature.

scholarly journals Dielectric properties and AC conductivity in La0.90Bi0.10MnO3 composite prepared by the solid-state reaction method

2021 ◽  
Author(s):  
Aaliyawani Ezzerin Sinin ◽  
Walter Charles Primus ◽  
Zainal Abidin Talib ◽  
Chen Soo Kien ◽  
Abdul Halim Shaari ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
Solid State ◽  
Solid State Reaction ◽  
Ac Conductivity ◽  
Solid State Reaction Method ◽  
Reaction Method
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