scholarly journals Synthesis and study of the electrical conductive properties of Cs2Fe2TiO16 in various gas atmospheres

2021 ◽  
Vol 2103 (1) ◽  
pp. 012193
Author(s):  
D A Rogova ◽  
O Yu Sinel’shchikova ◽  
N V Besprozvannykh ◽  
N A Morozov
Keyword(s):  
Activation Energy ◽  
Electrical Conductivity ◽  
Impedance Spectroscopy ◽  
Grain Boundary ◽  
Solid Phase Synthesis ◽  
Solid Phase ◽  
Type Structure ◽  
Total Resistance ◽  
Phase Synthesis ◽  
Conductive Properties

Abstract In this work, titanate Cs2Fe2Ti6O16 with a hollandite-type structure was synthesized by solid-phase synthesis. The electrical conductivity of the obtained ceramics was investigated in the temperature range from 25 to 800 °C in air and in the presence of an argon-hydrogen mixture (3% H2). It was found that the electrical conductivity of the compound under consideration depends on the composition of the atmosphere — the activation energy of conduction changes (0.57 eV in air and 0.91 eV in the presence of hydrogen). The volumetric and grain-boundary contributions to the total resistance of the sample in the gases under consideration are separated by impedance spectroscopy at a temperature of 800 °C.

Obtaining and Trademark of Copper Molybdenum Oxide from the CuMoO4 Sample Using Carbon as a Reducing Agent

2015 ◽  
Vol 1105 ◽  
pp. 154-158
Author(s):  
Akbota B. Alkenova ◽  
Aristotel Z. Isagulov ◽  
K. Zhumashev ◽  
Alain Hazotte
Keyword(s):  
Activation Energy ◽  
Solid Phase Synthesis ◽  
Solid Phase ◽  
Chemical Interaction ◽  
Temperature Synthesis ◽  
Phase Synthesis ◽  
Interaction Processes ◽  
Dta Curve ◽  
Energy Quantity ◽  
Energy Activation

This article discusses the calculation of the apparent activation energy (CuMoO4 + C) on the DTA curve, to study and optimize the time-temperature synthesis mode, in particular the activation energy. Activation energy allows us to investigate the elementary act of chemical interaction. Thus, we propose to use this method to calculate Eact interaction processes (CuMoO4 + C) in the solid phase synthesis occurring during the reinforcement. The research results are checked by thermodynamic calculations. The results obtained allow us to trace the energy quantity expended to start the reaction.

scholarly journals Conducting and dielectric properties of Na3Fe2(PO4)3 and Na2FePO4F

2021 ◽  
Vol 5 (3) ◽  
pp. 222-234
Author(s):  
A.A. Nogai ◽  
Zh.M. Salikhodzha ◽  
A.S. Nogai ◽  
D.E. Uskenbaev
Keyword(s):  
Dielectric Properties ◽  
Electrode Materials ◽  
Solid Phase Synthesis ◽  
Solid Phase ◽  
Sodium Ion ◽  
Sodium Ion Batteries ◽  
Dielectric Parameters ◽  
Phase Synthesis ◽  
Phase Transition Temperatures ◽  
Conductive Properties

In this research, the structure parameters, conducting and dielectric properties of Na3Fe2(PO4)3 and Na2FePO4F polycrystals were studied obtained by solid-phase synthesis. The phase transition temperatures, conducting and dielectric parameters of Na3Fe2(PO4)3 and Na2FePO4F polycrystals were refined. A comparative evaluation of the conductive properties of Na3Fe2(PO4)3 and Na2FePO4F polycrystals is given in this article. The prospects of using of Na3Fe2(PO4)3 and Na2FePO4F are justified as electrode materials in sodium ion batteries.

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