scholarly journals Study of the transport properties of composite solid electrolytes LiClO4-MgAl2O4

2021 ◽  
Vol 340 ◽  
pp. 01038
Author(s):  
Dmitriy Alekseev ◽  
Vyacheslav Khusnutdinov ◽  
Yulia Mateyshina
Keyword(s):  
Specific Surface ◽  
Transport Properties ◽  
Surface Area ◽  
Specific Surface Area ◽  
Solid Electrolytes ◽  
Mechanical Treatment ◽  
Magnesium Aluminum Spinel ◽  
Composite Solid Electrolytes ◽  
Composite Solid ◽  
Nanocrystalline Sample

Magnesium-aluminum spinel MgAl2O4 was synthesized by mechanical treatment of a mixture of hydroxides followed by treatment of the solution at 80 ° C and sintering at 850° C. The obtained nanocrystalline sample with a specific surface area of 100 m2/g were used for the preparation of composite solid electrolytes (1-x) LiClO4-xMgAl2O4. It was shown that conductivity increases with the spinel concentration and goes through a maximum of 1.35·10-2 S/cm at 150 °C for composite 0.3LiClO4-0.7MgAl2O4.

scholarly journals Advanced Laguerre Tessellation for the Reconstruction of Ceramic Foams and Prediction of Transport Properties

Materials ◽  
2019 ◽  
Vol 12 (7) ◽  
pp. 1137 ◽  
Author(s):  
Christos Stiapis ◽  
Eugene Skouras ◽  
Vasilis Burganos
Keyword(s):  
Specific Surface ◽  
Transport Properties ◽  
Surface Area ◽  
Specific Surface Area ◽  
Effective Diffusivity ◽  
Reconstruction Algorithm ◽  
Reconstruction Method ◽  
Ceramic Foams ◽  
Wide Range ◽  
Analytical Expressions

Ceramic foams are promising, highly porous materials, with a wide range of specific surface area and low fluid flow resistance, which are well-suited for filtering applications. They are comprised mainly of macrovoids that are interconnected with struts. A branch-shaped reconstruction algorithm is introduced in the present work to reconstruct various ceramic foams from electron microscopy images using the Laguerre tessellation method. Subsequently, the reconstructed samples are used for the numerical calculation of pore structure and transport properties, including specific surface area, tortuosity, effective diffusivity, and flow permeability. Following comparison with experimental data, this reconstruction method is shown to be more reliable than typical analytical expressions that are suggested in the literature for the aforementioned structural and transport properties. Extracting the equivalent pore radius of the reconstructed domains offers improved accuracy of the analytical expressions for the permeability estimation.

scholarly journals Dispersion Change in Peat Mechanical Treatment

2018 ◽  
Vol 41 ◽  
pp. 01049 ◽  
Author(s):  
Vladimir Lebedev ◽  
Olga Puhova
Keyword(s):  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Mechanical Treatment ◽  
Fine Fraction ◽  
Sharp Decrease ◽  
Coarse Fraction ◽  
Technological Parameters ◽  
Moisture Capacity ◽  
Processing Efficiency

The article discusses the research of peat physical and mechanical treatment which consists in determining technological parameters of peat stock. Size distribution and conditional specific surface area of peat particles are set. The relationship between processing efficiency and the content of peat fractions which size is less than 250 microns is derived. It proves to be linear. Treatment efficiency is found to be estimated by the data of a screen analysis alone and with satisfactory accuracy. Mechanical treatment has an effect on the values of total moisture capacity. The dependence is nonlinear and decreases insignificantly up to the conditional specific surface area of 350 m2/kg due to the partial grinding of fibrous coarse fractions. Mechanical treatment up to the conditional specific surface area of 500 m2/kg results in the sharp decrease of total moisture capacity due to the practically complete destruction of coarse fractions. With that of more than 500 m2/kg the values of total moisture capacity change insignificantly. Multiple peat treatment causes its mechanical consolidation and the reduction of coarse fraction content along with significant increase of fine fraction content.

scholarly journals d0-Ferromagnetism in SHS Titanium Nitride Treated by Ball Milling

2019 ◽  
Vol 21 (4) ◽  
pp. 347
Author(s):  
M.L. Busurina ◽  
O.V. Belousova ◽  
I.D. Kovalev ◽  
A.E. Sytschev
Keyword(s):  
Titanium Nitride ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Mechanical Treatment ◽  
Milling Time ◽  
Area Measurement ◽  
Specific Magnetization ◽  
Nitride Powder ◽  
Milled Powders

In this work, the influence of mechanical treatment (mechanical milling) of the TiN titanium nitride powder produced by self-propagating high-temperature synthesis on the magnetic properties of the milled powders is investigated. The effect of d0-magnetization was observed. The TiN powders were characterized by scanning electron microscopy, X-ray diffraction, vibrating-sample magnetometry, specific surface area measurement, and chemical analysis. The results show that the mechanical treatment of the TiN titanium nitride powder influences the magnetization in a nonmonotonic manner. The conditions of mechanical treatment corresponding to the best value of specific magnetization of milled powders were established. The specific magnetization depended on three measured parameters: specific surface area, coherent scattering region, and average particle size. It was shown that unit cell parameters of milled TiN titanium nitride powders have not been changed with the increasing of duration milling time. The calculated values of CSR of mechanically treated powders decreased with the increasing of duration of milling time. The values of macrostrains were negative. Mechanical treatment of the TiN titanium nitride powders has led to a change in the nitrogen content from 21.4 to 20.0 wt.%. Stoichiometry of the TiN titanium nitride varied from TiN0.903-TiN0.886; therefore, the observed d0-magnetization effect is associated with a defective surface structure of mechanically treated powders.

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