scholarly journals Studies on Structural, Morphology and Electrical Properties of Chemically Sprayed WO3-V2O5 Nanocomposites thin Films

2015 ◽  
Vol 53 ◽  
pp. 71-78
Author(s):  
J.M. Patil ◽  
S.B. Patil ◽  
R.H. Bari ◽  
A.N. Sonar
Keyword(s):  
Electron Microscopy ◽  
Activation Energy ◽  
Electrical Conductivity ◽  
Scanning Electron Microscopy ◽  
Spray Pyrolysis Technique ◽  
Element Composition ◽  
Structural Morphology ◽  
X Ray ◽  
Increase With Increase ◽  
Scanning Electron

Spray pyrolysis technique was employed to prepare WO3-V2O5 nanocomposites thin onto the preheated glass substrate at 350 °C. The films were characterized using X-ray diffractogram (XRD), Field emission scanning electron microscopy (FE-SEM), and Element composition was studied using energy dispersive spectrophotometer (EDAX).The film thickness was measured using weight difference method. Electrical conductivity measured with the help of two probe method. The crystallite size and grain size were observed to be increase with increase in films thickness with decrease in activation energy. The results are discussed and interpreted.

Structural and electrical investigation of (Ag3AsS3)x(As2S3)1−x superionic glasses

Open Physics ◽  
2012 ◽  
Vol 10 (1) ◽  
Author(s):  
Ihor Studenyak ◽  
Yuriy Neimet ◽  
Csaba Cserháti ◽  
Sándor Kökényesi ◽  
Edvardas Kazakevičius ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Activation Energy ◽  
Electrical Conductivity ◽  
Scanning Electron Microscopy ◽  
Transmission Coefficient ◽  
Structural Studies ◽  
Compositional Range ◽  
Electrical Investigation ◽  
Scanning Electron

AbstractStructural studies of (Ag3AsS3)x (As2S3)1−x chalcogenide superionic glasses in the compositional range x = 0.3–0.9 were performed by scanning electron microscopy. Temperature and compositional dependences of transmission coefficient, electrical conductivity, and activation energy were investigated

scholarly journals Synthesis, Crystal Structure Refinement, and Electrical Conductivity of Pb(8−x)Na2Smx(VO4)6O(x/2)

2014 ◽  
Vol 2014 ◽  
pp. 1-7
Author(s):  
Tatiana M. Savankova ◽  
Lev G. Akselrud ◽  
Lyudmyla I. Ardanova ◽  
Alexey V. Ignatov ◽  
Eugeni I. Get’man ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Electron Microscopy ◽  
Electrical Conductivity ◽  
Scanning Electron Microscopy ◽  
Solid Solutions ◽  
Structure Refinement ◽  
Crystal Structure Refinement ◽  
X Ray Diffraction ◽  
X Ray ◽  
Scanning Electron

Solid solutions of Pb(8−x)Na2Smx(VO4)6O(x/2)were studied using X-ray diffraction analysis including Rietveld refinement and scanning electron microscopy and by measuring their electrical conductivity. Crystal structure of the solid solutions was refined and the solubility region0≤x≤0.2was determined for samarium substitution for lead under the scheme2Pb2++□→2Sm3++O2-. The influence of degree of substitution on the electrical conductivity of solid solutions was established.

scholarly journals Влияние углеродных нанотрубок на электрические и механические свойства хитозановых пленок

2022 ◽  
Vol 92 (3) ◽  
pp. 435
Author(s):  
А.М. Камалов ◽  
В.В Kодолова-Чухонцева ◽  
E.Н Дресвянина ◽  
T.П Масленникова ◽  
И.П Добровольская ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Electrical Conductivity ◽  
Scanning Electron Microscopy ◽  
Composite Films ◽  
X Ray Diffraction ◽  
Electronic Components ◽  
Electrical Field ◽  
Field Frequency ◽  
X Ray ◽  
Scanning Electron

Using the methods of X-ray diffraction and scanning electron microscopy, the structure of composite films based on chitosan and single-wall carbon tubes has been studied. It is shown that the introduction of carbon nanotubes leads to the ordering of the chitosan structure. Increase in concentration of nanotubes (from 0 to 3%) causes rise in the value of storage modulus from 3 to 4 GPa (DMA data), increase in electrical conductivity of samples (from 10-11 to 102 S/m), and some changes in their dielectric permittivity (from 5.5. to 26 at an electrical field frequency of 1kHz). Data on the ionic and electronic components of the conductivity of the composite film are presented.

scholarly journals The Role of Chemical Substitutions on Bi-2212 Superconductors

Crystals ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 462 ◽  
Author(s):  
Riccardo Cabassi ◽  
Davide Delmonte ◽  
Muna Mousa Abbas ◽  
Ali Razzak Abdulridha ◽  
Edmondo Gilioli
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Critical Temperature ◽  
High Temperature Superconductor ◽  
X Ray Diffraction ◽  
Structural Morphology ◽  
X Ray ◽  
Critical Temperature Tc ◽  
Scanning Electron

We present a study on the correlation of the superconducting critical temperature (Tc) and structural morphology with a chemically substituted high-temperature superconductor (HTS) (Bi,Pb)-2212 via Powder X-ray Diffraction (PXRD), Scanning Electron Microscopy (SEM), Energy Dispersive X-ray Spectroscopy (EDX), and d c magnetometry. The elements Zn, Y, Ti, and Nd are incorporated within the bismuth cuprate structure at amounts that extend the ranges currently found in literature.

scholarly journals Impact of Pyrolysis Temperature on the Properties of Eucalyptus Wood-Derived Biochar

Materials ◽  
2020 ◽  
Vol 13 (24) ◽  
pp. 5841
Author(s):  
Bruno Caio Chaves Fernandes ◽  
Kassio Ferreira Mendes ◽  
Ananias Francisco Dias Júnior ◽  
Vinícius Patrício da Silva Caldeira ◽  
Taliane Maria da Silva Teófilo ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Electrical Conductivity ◽  
Scanning Electron Microscopy ◽  
Pyrolysis Temperature ◽  
Volatile Matter ◽  
Matter Content ◽  
X Ray Diffraction ◽  
X Ray ◽  
Eucalyptus Wood ◽  
Scanning Electron

Pyrolysis conditions directly influence biochar properties and, consequently, influence the potential use of biochar. In this study, we evaluated the effects of different pyrolysis temperatures (450, 550, 650, 750, 850, and 950 °C) on the hydrogen potential, electrical conductivity, ash content, yield, volatile matter content, elemental analysis, Fourier-transform infrared spectroscopy results, X-ray diffraction results, scanning electron microscopy results, specific surface area, and micropore volume of eucalyptus wood-derived biochar. The degree of linear association between pyrolysis temperatures and biochar properties was examined using the Pearson correlation coefficient. The results showed a positive correlation of the pyrolysis temperature with the hydrogen potential value, electrical conductivity, and elemental carbon. There was a negative correlation of the pyrolysis temperature with the yield, volatile matter content, elemental oxygen, elemental hydrogen, surface area, aromaticity, hydrophilicity, and polarity indexes. The Fourier-transform infrared spectroscopy data indicated an increase in aromaticity and a decrease in the polarity of high-temperature biochar. The increased pyrolysis temperature caused the loss of cellulose and crystalline mineral components, as indicated by X-ray diffraction analysis and scanning electron microscopy images. These results indicated that changing the pyrolysis temperature enables the production of biochar from the same raw material with a wide range of physicochemical properties, which allows its use in various types of agricultural and environmental activities.

scholarly journals Study on Comparative Analysis of Polymerization of Pyrrole Using Electrochemical Method and UV Photo Irradiation

2021 ◽  
Vol 04 (07) ◽  
Author(s):  
Dr. Hemant K. Chitte ◽  
Keyword(s):  
Electron Microscopy ◽  
Electrical Conductivity ◽  
Scanning Electron Microscopy ◽  
Fourier Transform ◽  
Electrochemical Method ◽  
Chemical Nature ◽  
X Ray Diffraction ◽  
X Ray ◽  
Xrd Techniques ◽  
Scanning Electron

Polymerization of pyrrole using various methods like pyrrole using electrochemical method and UV Photo irradiation has been investigated. Fourier transform infrared spectroscopy (FTIR), Scanning electron microscopy (SEM), X-ray diffraction (XRD) techniques were used to study the internal structure, material morphology, chemical nature of conducting polymers. The temperature dependence of the electrical conductivity of the Polypyrrole, Their behavior resemble the metallic conductors.

scholarly journals Kinetic analysis of the thermal decomposition of Li4Ti5O12 pellets

2011 ◽  
Vol 5 (4) ◽  
pp. 199-203 ◽  
Author(s):  
Hugo Mosqueda ◽  
Heriberto Pfeiffer
Keyword(s):  
Electron Microscopy ◽  
Activation Energy ◽  
Scanning Electron Microscopy ◽  
Kinetic Analysis ◽  
X Ray Diffraction ◽  
X Ray ◽  
Rapid Decomposition ◽  
Surface Decomposition ◽  
Decomposition Behaviour ◽  
Scanning Electron

A single dynamic kinetic analysis, describing the surface decomposition of Li4Ti5O12 pellets, has been performed. Samples were analyzed by X-ray diffraction and scanning electron microscopy. The analyses were performed between 1000 and 1100?C and different times, perceiving the Li4Ti5O12 decomposition to Li2Ti3O7 , with a loss of lithium. As expected, more rapid decomposition behaviour was found at higher temperatures. Finally, the activation energy for this decomposition of Li4Ti5O12 to Li2Ti3O7 was estimated to be equal to 383 kJ/mol.

scholarly journals EFECTS OF CHEMICAL COMPOSITION ON THE MICROSTRUCTURE AND PROPERTIES OF THE CU-Ge-Sb ALLOYS

2017 ◽  
Vol 8 (1) ◽  
Author(s):  
Dejan Gurešić ◽  
Aleksandar Đorđević ◽  
Aleksandar Marković ◽  
Milica Tomović ◽  
Nadežda Talijan ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Electrical Conductivity ◽  
Scanning Electron Microscopy ◽  
Chemical Composition ◽  
Diffraction Analysis ◽  
Eddy Current ◽  
Energy Dispersive Spectroscopy ◽  
X Ray Diffraction ◽  
X Ray ◽  
Scanning Electron

In the current study a ternary Cu-Ge-Sb system has been experimentally assessed. Chemical andphase compositions of the alloy samples from three vertical sections Cu-GeSb, Ge-CuSb and Sb-CuGe were studied using scanning electron microscopy (SEM) and energy dispersive spectroscopy(EDS) and confirmed by X-ray diffraction analysis (XRD). Hardness of the alloys was measured byBrinell method while hardness of phases was measured using micro Vickers method. Electricalconductivity of the studied alloys was measured using eddy current instrument. Based onexperimentally determined values iso-lines of hardness and electrical conductivity for the wholeternary system were calculated using assumed mathematical models.

Preparation of TI-Ba-Ca-Cu Superconducting Oxide Films by Spray Pyrolysis Technique

1991 ◽  
Vol 226 ◽  
Author(s):  
H.S. Koo ◽  
T.L. Kuo ◽  
D.H. Kuo ◽  
R.J. Lin ◽  
W.H. Lee ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Spray Pyrolysis ◽  
Room Temperature ◽  
Spray Pyrolysis Technique ◽  
Superconducting Films ◽  
X Ray Diffraction ◽  
X Ray ◽  
Zero Resistance ◽  
Scanning Electron

AbstractSuperconducting TI-Ba-Ca-Cu-O(TBCCO) films with zero resistance temperatures above 100K have been prepared on (001)MgO single-crystal substrates by the combination techniques of spray pyrolysis and Tl-diffusion. The as-sprayed Ba-Ca-Cu-O films and the sintered TBCCO superconducting bulks were wrapped in Au foil and heated in oxygen at temperatures ranging from 890 to 920°C and cooled to room temperature by furnace cooling. Highly c-axis oriented superconducting films were obtained and their average thicknesses were about 5-10 μm. The characteristics of TBCCO films by X-ray diffraction, scanning electron microscopy and electrical property are discussed.

Study of 4.5%mol Y2O3-Doped ZrO2 with Submicrometer Grain Size

2014 ◽  
Vol 805 ◽  
pp. 570-575
Author(s):  
Eleomar Lena ◽  
Adriana Scoton Antonio Chinelatto ◽  
Adilson Luiz Chinelatto
Keyword(s):  
Electron Microscopy ◽  
Activation Energy ◽  
Scanning Electron Microscopy ◽  
Grain Size ◽  
Electrical Properties ◽  
Pechini Method ◽  
Oxygen Flow ◽  
X Ray Diffraction ◽  
X Ray ◽  
Scanning Electron

The aim of this study was to obtain 4.5%mol Y2O3-doped ZrO2dense with submicrometer grain size and studying the effects of using oxygen flow during calcination in the electrical properties of bodies sintered. The powders were synthesized by the Pechini method. After synthesis, the resins were dried and the calcinations were performed in air and in oxygen flow at 600°C for 2 h. The powders were pressed with 1600 MPa and sintered by Two Step Sintering (TSS) at 1500°C / 5 min and 1200°C, 1300oC, 1400°C, remaining at these temperatures for 2 and 10 hours. The sinterized samples were characterized by X-ray diffraction, apparent density, scanning electron microscopy and impedance spectroscopy. The apparent densities were greater than 94% for all conditions of calcination and sintering. The value of the activation energy was 0.7eV for the grain and 0.9 eV for the grain boundaries.

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