A lithiation/delithiation mechanism of monodispersed MSn5 (M = Fe, Co and FeCo) nanospheres

2015 ◽  
Vol 3 (13) ◽  
pp. 7170-7178 ◽  
Author(s):  
Fengxia Xin ◽  
Xiaoliang Wang ◽  
Jianming Bai ◽  
Wen Wen ◽  
Huajun Tian ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Particle Size ◽  
Reaction Mechanism ◽  
Particle Size Distribution ◽  
Surface Morphology ◽  
Electrochemical Performance ◽  
Size Distribution ◽  
Identical Particle ◽  
Particle Surface ◽  
Thermodynamics And Kinetics

The same crystal structure, identical particle surface morphology and the similar particle size distribution of MSn5 (M = Fe, Co and FeCo) phases are ideal for comparison of the electrochemical performance, reaction mechanism, thermodynamics and kinetics.

Preparation of Potassium Niobate/Barium Titanate Nanocomposite Ceramics with a Wide Barium Titanate Particle Size Distribution and their Dielectric Properties

2013 ◽  
Vol 582 ◽  
pp. 76-79
Author(s):  
Ichiro Fujii ◽  
Kenta Yamashita ◽  
Kouichi Nakashima ◽  
Yoshinori Fujikawa ◽  
Daisuke Tanaka ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Particle Size ◽  
Barium Titanate ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Molar Ratio ◽  
Narrow Particle Size Distribution ◽  
Potassium Niobate ◽  
Barium Titanate Powder ◽  
Wide Particle Size Distribution

Denser, solvothermally synthesized KNbO3 (KN) / BaTiO3 (BT) composites with heteroepitaxial interfaces were prepared using the barium titanate powder with a wide particle size distribution. The relative density was 68 - 80 %, which was larger than that of the composites prepared using the barium titanate powder with a narrow particle size distribution. The dielectric constant was 300 450 and it was maximized at the KN/BT molar ratio of 0.5. The origin was discussed with the microstructure and crystal structure.

Анализ параметров медицинского технологического оборудования, учитывающие факторы, влияющие на качество изготовления лекарств

2020 ◽  
pp. 90-95
Author(s):  
T.V. Karlova ◽  
◽  
D.O. Sv ◽  
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Particle Shape ◽  
Particle Surface ◽  
Technological Equipment ◽  
Factors Affecting ◽  
Particle Strength ◽  
The Web

The article is devoted to the analysis of parameters of medical technological equipment that take into account factors affecting the quality of manufacture of drugs. Factors such as particle size, particle size distribution, particle shape, particle surface properties, particle strength, which, based on the «Web» method, are used to analyze the «vibrosieve» technological equipment, are considered.

Effect of Vibro-Milling Time on Phase Formation and Particle Size of ZnNbO6 Nano-Powders

2009 ◽  
Vol 421-422 ◽  
pp. 550-553
Author(s):  
Athipong Ngamjarurojana ◽  
Rattikorn Yimnirun ◽  
Supon Ananta
Keyword(s):  
Crystal Structure ◽  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Phase Formation ◽  
Milling Time ◽  
Distribution Curve ◽  
Laser Diffraction ◽  
Narrow Particle Size Distribution ◽  
Particle Size Distribution Curve

Zinc niobate, ZnNb2O6, nanopowders was synthesized by a solid-state reaction via a rapid vibro-milling technique. The effect of milling time on the phase formation and particle size of ZnNb2O6 powder was investigated. The formation of the ZnNb2O6 phase investigated as a function of calcination conditions by DTA and XRD. The particle size distribution of the calcined powders was determined by laser diffraction technique, while morphology, crystal structure and phase composition were determined via a SEM techniques. In addition, by employing an appropriate choice of milling time, a narrow particle size distribution curve was also observed.

scholarly journals Laser Triangulation in 3-Dimensional Granulometric Analysis

2016 ◽  
Vol 61 (1) ◽  
pp. 15-27 ◽  
Author(s):  
Adam Heyduk
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Particle Surface ◽  
Three Dimensional ◽  
Spatial Arrangement ◽  
Conveyor Belt ◽  
Laser Triangulation ◽  
Depth Maps ◽  
Coal Particles

Abstract The measurement of the particle size distribution plays an important role in mineral processing. Due to the high costs and time-consumption of the screening process, modern machine vision methods based on the acquisition and analysis of recorded photographic images. But the image analysis methods used so far, do not provide information on the three-dimensional shape of the grain. In the coal industry, the application scope of these methods is substantially limited by the low reflectivity of the black coal particle surface. These circumstances hinder proper segmentation of coal stream surface image. The limited information contained in two-dimensional image of the raw mineral stream surface, makes it difficult to identify proper size of grains partially overlapped by other particles and skewed particles. Particle height estimation based on the shadow length measurement becomes very difficult in industrial environment because of the fast movement of the conveyor belt and because of spatial arrangement of these particles, usually touching and overlapping. Method of laser triangulation connected with the movement of the conveyor belt makes it possible to create three-dimensional depth maps. Application of passive triangulation methods (e.g. stereovision) can be impeded because of the low contrast of the black coal on the black conveyor belt. This forces the use of active triangulation methods, directly identifying position of the analyzed image pixel. High contrast of the image can be obtained by a direct pointwise laser lighting. For the simultaneous identification of the entire section of the raw material stream it is useful to apply a linear laser (a planar sheet of the laser light). There have been presented basic formulas for conversion of pixel position on the camera CCD matrix to the real-word coordinates. A laboratory stand has been described. This stand includes a linear laser, two high-definition (2Mpix) cameras and stepper motor driver. The triangulation head moves on the rails along the belt conveyor section. There have been compared acquired depth maps and photographic images. Depth maps much better describe spatial arrangement of coal particles, and have a much lower noise level resulting from the specular light reflections from the shiny fragments of the particle surface. This makes possible an identification of the coal particles partially overlapped by other particles and obliquely arranged particles. It enables a partial elimination or compensation of image disturbances affecting the final result of the estimated particle size distribution. Because of the possibility of the reflected laser beam overriding by other particles it is advantageous to use a system of two cameras. Results of the experimental research confirmed the usefulness of the described method in spite of low reflectance factor of coal surface. The fast detection of changes in particle size distribution makes possible an on-line optimization of complex technological systems - especially those involving coal cleaning in jigs - thus leading to better stabilization of quality parameters of the enrichment output products. An additional application of the described method can be achieved by measuring the total volume of the stream of the transported materials. Together with the measurement signal from the belt conveyor weight it makes possible to estimate the bulk density of the raw mineral stream. The low complexity of the signal processing in the laser triangulation method is associated with the acquisition of high contrast images and analysis based on simple trigonometric dependencies.

The Role of the Apparent Density on the Permeability of Porous Stainless Steel Parts

2005 ◽  
Vol 498-499 ◽  
pp. 217-224
Author(s):  
Daniel Rodrigues ◽  
João Pedro Tosetti ◽  
Flávio Beneduce ◽  
Lucio Salgado ◽  
Francisco Ambrozio Filho
Keyword(s):  
Particle Size ◽  
Stainless Steel ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Apparent Density ◽  
Particle Surface ◽  
Mechanical Resistance ◽  
Porous Stainless Steel ◽  
Roughness Control

Austenitic stainless steel filters are mostly used when there is an aggressive environment condition, especially when good corrosion and mechanical resistance at relatively high temperature are required. These filters are usually obtained from non-spherical, mostly atomized powders by cold pressing and sintering. In order to achieve an adequate performance concerning permeability, powders with a narrow range of particle size should be used. However, besides particle size distribution, apparent density of the selected powder, which can be adjusted by the particle size, shape and distribution, affects the performance of the final product. Particle size distribution, particle shape and particle surface roughness control apparent density. This work presents some results on the evaluation of such effect.

scholarly journals Correction: Effect of particle size distribution on the electrochemical performance of micro-sized silicon-based negative materials

RSC Advances ◽  
2018 ◽  
Vol 8 (35) ◽  
pp. 19894-19894
Author(s):  
Shuaijin Wu ◽  
Bing Yu ◽  
Zhaohui Wu ◽  
Sheng Fang ◽  
Bimeng Shi ◽  
...  
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Electrochemical Performance ◽  
Size Distribution ◽  
Correction Effect ◽  
Negative Materials ◽  
Effect Of Particle Size ◽  
Silicon Based

Correction for ‘Effect of particle size distribution on the electrochemical performance of micro-sized silicon-based negative materials’ by Shuaijin Wu et al., RSC Adv., 2018, 8, 8544–8551.

Effects of Concentration of TiOSO4 and Fe/TiO2 Ratio on TiO2 Anatase White Pigment Production via Short Sulfate Process

2013 ◽  
Vol 634-638 ◽  
pp. 391-396 ◽  
Author(s):  
Cong Xue Tian ◽  
Shuang Hua Huang ◽  
Ying Yang
Keyword(s):  
Crystal Structure ◽  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Narrow Particle Size Distribution ◽  
Crystal Formation ◽  
Aggregation Process ◽  
Thermal Hydrolysis ◽  
White Pigment ◽  
Sulfate Process

Using unconcentrated TiOSO4 solution from sulfate process as titanium source, anatase TiO2 white pigment was prepared by self-generating seed thermal hydrolysis route via short sulfate process. The effects of concentration of TiOSO4 solution and Fe/TiO2 ratio on the structure and pigment properties of the TiO2 white pigments were investigated. The samples were characterized by XRD, particle size distribution and pigment properties test. The concentration of TiOSO4 solution and Fe/TiO2 ratio had great effects on the super-saturation of TiO2+, crystal formation, nucleation, crystallization and aggregation process, eventually determined the crystal structure, particle size distribution and its pigment properties. The optimized concentration of TiOSO4 solution was of 195 g/L, and the Fe/TiO2 ratio was at 0.30.The as-prepared anatase white pigment was appropriate particle size, narrow particle size distribution and good pigment properties.

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