The Vertical Mill Slag Micro-Powders' Particle Size Distribution and Microstructure Analysis

2014 ◽  
Vol 487 ◽  
pp. 308-312
Author(s):  
Tao Ye ◽  
Xiao Dong Chen ◽  
Bin Jiang
Keyword(s):  
Particle Size ◽  
Particle Image ◽  
Preparation Method ◽  
Shape Index ◽  
Analysis Software ◽  
Quantitative Characterization ◽  
Sem Images ◽  
Cement Grinding ◽  
Grinding System

Vertical mill grinding system is one of the important cement grinding equipments developed in recent years. In this paper, through the industry vertical mill grinding GGBS carried out a detailed analysis of particle size, on this basis, using the attached to the sample preparation method, obtained the typical SEM images of GGBS through industrial vertical mill, and using particle image analysis software for slag microstructure has carried on the qualitative analysis, obtained the change rule of microstructure of the grinding process. Meanwhile, using shape index, roundness coefficient, flat degree, angularity and surface roughness quantitative characterization of the microstructure of slag powders.

Synthesis and Characterization of Li4Ti5O12 Doped by Na and Al as Anodes Material for Li-Ion Batteries

2015 ◽  
Vol 1112 ◽  
pp. 241-244 ◽  
Author(s):  
Slamet Priyono ◽  
Bambang Prihandoko ◽  
Anne Zulfia Syahrial
Keyword(s):  
Particle Size ◽  
Electrochemical Performance ◽  
Li Ion Batteries ◽  
Sem Images ◽  
Uniform Size ◽  
Undoped Material ◽  
Three Phase ◽  
Polyhedral Shape ◽  
Li Ion

Li4Ti5O12 pure and Li4Ti5O12 with Na and Al doped Li(3-x/3)AlxNaTi(5-2x/3)O12 (x=0, 0.025, 0.05, 0.075) as anodes for Li-ion batteries are synthesized at 850°C via solid state reaction using Li2CO3, TiO2-anatase, Al2O3 and Na2CO3 as precursor. The effect of substitution of Al and Na in Li4Ti5O12 on characterization of precursor and electrochemical performance is studied. It is found that Na doped in Li4Ti5O12 pure affected the formation of three phase i.e NaLiTi3O7, Li4Ti5O12, dan Li2TiO3. Meanwhile, Al doped contributed to the formation of NaLiTi3O7 phase significantly. The SEM images show that the particles have polyhedral shape with uniform size distribution. Na doped in the Li4Ti5O12 affected particle size become larger against Al doped particle size become smaller than undoped material, the best particle size measured by PSA is 30,89 . All characterization of material will determine the electrochemical performance of Li-ion battery.

Preparation and Characterization of Ethyl Cellulose-Based Microcapsules Containing Argy Wormwood Solution

2013 ◽  
Vol 448-453 ◽  
pp. 98-101
Author(s):  
Ping Jiang ◽  
Du Xin Li ◽  
Yue Jun Liu
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Ethyl Cellulose ◽  
Chemical Structure ◽  
Controlled Delivery ◽  
Core Shell ◽  
Sem Images ◽  
Optical Micrograph ◽  
Spherical Structures

The biodegradable microcapsules based ethyl cellulose (EC) for a controlled delivery of Argy Wormwood solution (AWS) were prepared by emulsionsolvent evaporation method using ethyl acetate as solvent. This study examined the effect of the ratios of core to shell on the size of microcapsules. SEM images of microcapsules showed uniform spherical structures with smooth surfaces with a particle size distribution of 100nm2μm. Core-shell, hetero-structures were confirmed using optical micrograph. The chemical structure of the microcapsules was determined by FTIR.

scholarly journals Investigation of the Effect of Magnification, Accelerating Voltage, and Working Distance on the 3D Digital Reconstruction Techniques

Scanning ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
Seyed Mahmoud Bayazid ◽  
Nicolas Brodusch ◽  
Raynald Gauvin ◽  
Michela Relucenti
Keyword(s):  
Spherical Particles ◽  
Reconstruction Technique ◽  
Quantitative Characterization ◽  
Sem Images ◽  
Digital Reconstruction ◽  
Backscattered Electron ◽  
Working Distance ◽  
Backscattered Signals ◽  
2D Images

In this study, the effect of Scanning Electron Microscopy (SEM) parameters such as magnification ( M ), accelerating voltage ( V ), and working distance (WD) on the 3D digital reconstruction technique, as the first step of the quantitative characterization of fracture surfaces with SEM, was investigated. The 2D images were taken via a 4-Quadrant Backscattered Electron (4Q-BSE) detector. In this study, spherical particles of Ti-6Al-4V (15-45 μm) deposited on the silicon substrate were used. It was observed that the working distance has a significant influence on the 3D digital rebuilding method via SEM images. The results showed that the best range of the working distance for our system is 9 to 10 mm. It was shown that by increasing the magnification to 1000x, the 3D digital reconstruction results improved. However, there was no significant improvement by increasing the magnification beyond 1000x. In addition, results demonstrated that the lower the accelerating voltage, the higher the precision of the 3D reconstruction technique, as long as there are clean backscattered signals. The optimal condition was achieved when magnification, accelerating voltage, and working distance were chosen as 1000x, 3 kV, and 9 mm, respectively.

Fabrication and Characterization of AgCoO2 Delafossite by Cation Exchange Process

2014 ◽  
Vol 602-603 ◽  
pp. 11-14
Author(s):  
Xiu Li Feng ◽  
Xiao Jiang Liu ◽  
Yong Qiang Yuan
Keyword(s):  
Crystal Structure ◽  
Particle Size ◽  
Cation Exchange ◽  
Exchange Process ◽  
Single Particles ◽  
Effect Factors ◽  
Sem Images ◽  
Preparation Conditions ◽  
Fabrication And Characterization

A new method to synthesize AgCoO2 delafossite powder with AgNO3 and LiCoO2 by the cation exchange solid state reaction at an atmospheric press has been presented. The effect factors such as moral ratio Ag/Li, reaction time, reaction temperature on the production were discussed systematically and the optimized preparation conditions were obtained. The crystal structure of AgCoO2 from XRD is monoclinic. SEM images showed that AgCoO2 is sheet in shape,single particle size is about 100nm and many single particles swam to form irregular polygon agglomerates.

Quantitative Characterization of Fe/Al2O3 Catalysts. Part I: Oxidic Precursors

1992 ◽  
Vol 46 (2) ◽  
pp. 208-218 ◽  
Author(s):  
Douglas P. Hoffmann ◽  
Marwan Houalla ◽  
Andrew Proctor ◽  
Martin J. Fay ◽  
David M. Hercules
Keyword(s):  
Solid Solution ◽  
Particle Size ◽  
Weight Percent ◽  
Solution Phase ◽  
Solid Solution Phase ◽  
Gravimetric Analysis ◽  
Iron Loading ◽  
Quantitative Characterization ◽  
Alumina Support

The structure of a series of Fe/Al2O3 catalysts containing from 1 to 24 weight percent iron has been examined by XRD, EXAFS, Mössbauer, ESCA, and gravimetric analysis. Two iron phases, Fe2O3 and Fe+3 in solid solution in the alumina support, are characterized as a function of iron loading. The combination of ESCA H2 titration and gravimetric analysis allows both quantitative and qualitative measurement of the two species. The amount of Fe2O3 phase increases with increasing iron loading for Fe1 to Fe24, whereas the amount of Fe+3 solid-solution phase increases with increasing iron loading for Fe1 to Fe6 and then levels off to approximately 2.2 wt % Fe for Fe8 to Fe24. The particle size of the Fe2O3 phase, determined from ESCA measurements, increases with increasing iron loading.

Synthesis and Characterization of Flower-Sphere MoS2

2011 ◽  
Vol 695 ◽  
pp. 429-432 ◽  
Author(s):  
Jun Zhou ◽  
Xin Zhe Lan ◽  
Ping Ren ◽  
Qiu Li Zhang ◽  
Yong Hui Song ◽  
...  
Keyword(s):  
Particle Size ◽  
Hydrothermal Systems ◽  
Molar Ratio ◽  
Synthesis And Characterization ◽  
X Ray Diffraction ◽  
Sem Images ◽  
X Ray ◽  
Xrd Patterns ◽  
Scanning Electron

The flower-sphere molybdenum disulfide has been synthesized by reaction of Na2MoO4 and CS(NH2)2 with NH2OH·HCl or H2C2O4 as reductant. The microstructure and chemical composition of the product were characterized by means of X-ray diffraction and scanning electron microscope. XRD patterns showed that the molar ratio of Mo to S had a great effect on the purity of the product. When the molar ratio of Mo to S was 1:5, the product was nearly pure MoS2. SEM images showed that the particle size increased as the molar ratio of Mo to S reduced. The MoS2 microspheres had rough surfaces and were constructed with sheet-like structures in the two systems. But the product from the system of NH2OH·HCl as reductant has the bigger particle size, clearer petal-sheets, coarser surface and weaker agglomeration than that from the system H2C2O4 as reductant. The possible chemical reactions in hydrothermal systems were preliminarily discussed.

Fractal and Lacunarity Analyses: Quantitative Characterization of Hierarchical Surface Topographies

2016 ◽  
Vol 22 (1) ◽  
pp. 168-177 ◽  
Author(s):  
Edwin J. Y. Ling ◽  
Phillip Servio ◽  
Anne-Marie Kietzig
Keyword(s):  
Processing Parameters ◽  
Surface Structures ◽  
Quantitative Characterization ◽  
Sem Images ◽  
Length Scales ◽  
Sem Image ◽  
Multiple Length Scales ◽  
Surface Topographies ◽  
Lacunarity Analysis

AbstractBiomimetic hierarchical surface structures that exhibit features having multiple length scales have been used in many technological and engineering applications. Their surface topographies are most commonly analyzed using scanning electron microscopy (SEM), which only allows for qualitative visual assessments. Here we introduce fractal and lacunarity analyses as a method of characterizing the SEM images of hierarchical surface structures in a quantitative manner. Taking femtosecond laser-irradiated metals as an example, our results illustrate that, while the fractal dimension is a poor descriptor of surface complexity, lacunarity analysis can successfully quantify the spatial texture of an SEM image; this, in turn, provides a convenient means of reporting changes in surface topography with respect to changes in processing parameters. Furthermore, lacunarity plots are shown to be sensitive to the different length scales present within a hierarchical structure due to the reversal of lacunarity trends at specific magnifications where new features become resolvable. Finally, we have established a consistent method of detecting pattern sizes in an image from the oscillation of lacunarity plots. Therefore, we promote the adoption of lacunarity analysis as a powerful tool for quantitative characterization of, but not limited to, multi-scale hierarchical surface topographies.

Mechanical and microstructural characterization of epoxy/sawdust (Pinus elliottii) composites

2020 ◽  
pp. 096739112095650
Author(s):  
Caroliny P Mendes ◽  
Robson Fleming ◽  
Além-Mar B Goncalves ◽  
Michael J da Silva ◽  
Rogério Prataviera ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Particle Size ◽  
Microstructural Characterization ◽  
Pinus Elliottii ◽  
Wood Residue ◽  
Mechanical Reinforcement ◽  
Sem Images ◽  
Homogeneous Surface ◽  
The Matrix

The use of wood residues in polymeric matrices is notable for promoting significant mechanical reinforcement of the matrix. Such composites are widely used in the development of new composite materials with tunable mechanical properties for a variety of applications. In this work, polymeric composites with epoxy resin as the polymeric matrix and Pinus elliottii wood residue as the reinforcement were obtained. The composites were obtained by adding wood residue (sawdust) with particle sizes of 0.30, 0.60, and 1.19 millimeters into an epoxy matrix to determine the best mechanical properties of the composite as a function of the particle size. The polymer/sawdust composites were characterized by scanning electron microscopy (SEM), Infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), and stress–strain tests. SEM images revealed a smooth and homogeneous surface free of defects and holes. However, lateral profile images showed the presence of fine sawdust particles agglomerated and a considerable number of bubbles and cavities that could interfere in the mechanical properties of the composites. The FTIR characterization of the composite identified the main bands related to epoxy and lignin/cellulose chains. The results of the mechanical properties suggested that epoxy composites with sawdust can increase its tensile strength according to the sawdust particle size introduced into the matrix.

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