scholarly journals Synthesis and Microstructural Characterization of Cu2MnSnS4/Se4 Nano-Thermoelectric Material

2020 ◽  
Vol 8 (6) ◽  
pp. 3749-3755
Keyword(s):  
Particle Size ◽  
Ball Milling ◽  
System Analysis ◽  
Microstructural Analysis ◽  
Microstructural Characterization ◽  
High Energy ◽  
Particle Size Analysis ◽  
Size Analysis ◽  
Elemental Mapping ◽  
Average Size

In the present study Cu2MnSnS4 /Se4 nanostructured material is synthesized using mechanical alloying. The elemental powders were alloyed in a high-energy ball mill under the following conditions: milling time 25 hours, ball-to-powder mass ratio (BPR) 10:1 and a rotation speed of 300 rpm. Detailed investigation of the microstructure of the synthesized alloy was carried out. The starting elemental powders size and morphology were characterized using Apreo field emission gun scanning electron microscope (FEGSEM). Elemental mapping of the synthesized alloy was characterized using energy dispersive spectroscopy (EDS) attached to FEGSEM system. Analysis of microstructure was performed using EDAX-TEAM advanced software. A dynamic laser light scattering was used for particle size analysis. The results showed that Cu2MnSnS4 /Se4 nanostructured is successfully synthesized by ball milling. The Z-average size distribution of the particle reveals that ball milling results in a considerable refining in the particle size from 44 micron down to 923.5 nm. Further, it was observed that 94.4% showed an average size of 725.8±233 nm. Microstructural analysis confirmed the formation of a homogenous structure of Cu2MnSnS4 /Se4 alloy in the powder and green samples. The elemental mapping confirmed the formation of solid solution of the processed alloy with homogenous distribution of all elements in the examined region. Quantitative analysis performed by EDAX-TEAM software confirmed the chemical composition and homogeneity of the processed material.

scholarly journals The influence of ball milling processing variables on the microstructure and compaction behavior of Fe–Mn–Cu alloys

2021 ◽  
Vol 39 (3) ◽  
pp. 410-429
Author(s):  
Hany R. Ammar ◽  
Subbarayan Sivasankaran ◽  
Abdulaziz S. Alaboodi
Keyword(s):  
Ball Milling ◽  
Compaction Pressure ◽  
Microstructural Characterization ◽  
High Energy ◽  
Particle Size Analysis ◽  
Substantial Improvement ◽  
Size Analysis ◽  
X Ray ◽  
Compaction Behavior ◽  
Input Parameters

Abstract In the present study, twenty seven [(Fe–35wt%Mn)100−x –Cu x ] alloy samples were processed using high-energy ball milling, followed by uniaxial compaction under different processing conditions. The compressibility behavior in terms of relative density (RD) was examined with milling time (MT: 1 h, 5.5 h, and 10 h), ball-to-powder mass ratio (BPMR: 5:1, 10:1, and 15:1), milling speed (MS: 100 rev/min, 200 rev/min, and 300 rev/min), compaction pressure (CP: 25–1,100 MPa), and alloy composition (Cu content [CC]: 0 wt%, 5 wt%, 10 wt%). Particle size analysis using X-ray diffraction (XRD) and high-resolution scanning electron microscopy (HRSEM) combined with energy-dispersive X-ray spectroscopy (EDS) were applied for microstructural characterization. The experiments were conducted based on the central composite design of response surface methodology (RSM), and the results for the compaction behavior were examined with the input parameters. Analysis of variance (ANOVA) test was applied to determine the most significant input parameters. The attained results revealed that increasing ball milling parameters (MT, MS, and BPMR) resulted in significant enhancements in the microstructural features, such as improved elemental dispersion and occurrence of refined particles with substantial decrease in the crystallite size. On the other hand, increasing the input parameters exhibited a detrimental influence on the compactibility and RD of the alloys. In addition, increasing the CC resulted in a substantial improvement in the compressibility and RD of the developed alloys. The recommended combination of the studied variables includes MT for 5 h, MS for 150 rev/min, BPMR of 10:1, and 10 wt%Cu to attain an acceptable compromise of enhanced microstructure features, improved compaction response, and RD.

Preparation of Nano-TiO2 in Inverse Micro-Emulsion System with Compound Surfactant

2011 ◽  
Vol 412 ◽  
pp. 25-31
Author(s):  
Wen Yuan Gao ◽  
Xing Xin Jia ◽  
Mei Hong Niu ◽  
Nai Ling Tang ◽  
Zhi Qiang Hu
Keyword(s):  
Particle Size ◽  
Particle Size Analysis ◽  
Raw Material ◽  
Size Analysis ◽  
X Ray Diffraction ◽  
Surface Active Agents ◽  
Micro Emulsion ◽  
Emulsion Process ◽  
Surface Active ◽  
Average Size

The nanosized TiO2 is prepared by micro-emulsion process in the system of cyclohexane / [Span80 combined with OP-10] / water with TiCl4 as raw material. The selection method of the surface-active agents was investigated and the influence of amount of surfactant, water / oil ratio and concentration of reactants on the particle size were discussed in this work. The temperature schedule, crystal structure, particle size distribution and appearance of the nanocrystalline TiO2 were analyzed by differential thermal analysis (DTA) combined with X-ray diffraction (XRD), laser particle size analysis (LPSA) and scanning electron microscope (SEM). The results showed that: under these conditions of mixture of 8g Span80 and 2g OP-10 as the emulsifier, water / oil mass ratio of 1/4, TiCl4 concentration of 0.6mol / L and calcinations temperature of 510°C, nanoTiO2 powder with smaller particle size and better dispersion was prepared . And the average size of the product was 27.3nm.

Effect of Nano Size Powder of Polygonum minus by Ball Milling

2015 ◽  
Vol 1109 ◽  
pp. 333-339 ◽  
Author(s):  
A.S. Nadzirah ◽  
M. Rusop ◽  
I. Abdul Latif
Keyword(s):  
Particle Size ◽  
Ball Milling ◽  
Physicochemical Characterization ◽  
Preventive Health Care ◽  
Particle Size Analysis ◽  
Milling Process ◽  
Correlation Spectroscopy ◽  
Size Analysis ◽  
Stomach Pain ◽  
Polygonum Minus

Polygonum minus or ‘kesum’ is a traditional Malaysian plant used as flavoring agent and recommended for digestive disorders as well as stomach pain. The leaves are often eaten fresh as a vegetable (salad and ulam), especially among the Malay communities for preventive health care. The physicochemical characterization of nanosize of Polygonum minus in wet mill and dry mill was influenced by ball milling process using planetary ball mill. Particle size analysis employing photon correlation spectroscopy was carried out to record the effect of milling parameters on the particle size produced. Fourier Transform Infra-Red (FTIR) spectrum was recorded for functional groups analysis. The result showed that after ball milling, the average size of particles was reduced while FTIR results showed the peak at region of 1,600-1,500 cm-1 is due to the stretching vibration of carbonyl group and 1300-1,000 cm1 indicate a stretching of C-H group.

Simultaneous Effect of Ultrasonic and Chemical Treatment on the Extraction of Nanocellulose From Sugarcane Bagasse

2021 ◽  
Vol 24 (5) ◽  
pp. 146-151
Author(s):  
A'yunil Hisbiyah ◽  
Lilik Nurfadlilah
Keyword(s):  
Particle Size ◽  
Sugarcane Bagasse ◽  
Chemical Treatment ◽  
Extraction Process ◽  
Particle Size Analysis ◽  
Ultrasonic Waves ◽  
Size Analysis ◽  
Simultaneous Effect ◽  
Average Size ◽  
Intramolecular Hydrogen

The focus of this study was the simultaneous effect of ultrasonic and chemical treatment on the extraction of nanocellulose from sugarcane bagasse. Ultrasonic waves can accelerate the dispersion process of nanocellulose particles so that extraction runs faster and is environmentally friendly. The bagasse was treated by chemical treatment with ultrasonic waves, and then the nanocellulose was prepared using acid hydrolysis with ultrasonic waves. The effect of ultrasonication was investigated. The crystallinity of sugarcane bagasse, cellulose, and nanocellulose was analyzed by X-ray diffraction. Based on the diffractogram, there was an increase in the crystallinity of nanocellulose. The chemical composition of extracted cellulose and nanocellulose was analyzed by Fourier-transformed infrared spectroscopy. The results of the analysis showed that lignin and hemicellulose were removed from the bagasse during the extraction process. The analysis results also showed that the breaking of intramolecular hydrogen and glycosidic bonds occurred during the hydrolysis process. The morphology of bagasse, cellulose, and nanocellulose was analyzed by Scanning electron microscopy. While the particle size of nanocellulose was analyzed by the Particle Size Analysis instrument. The average size of nanocellulose particles was 132.67 nm.

scholarly journals Nano Zinc Oxide Green-Synthesized from Plumbago auriculata Lam. Alcoholic Extract

Plants ◽  
2021 ◽  
Vol 10 (11) ◽  
pp. 2447
Author(s):  
Mina Michael Melk ◽  
Seham S. El-Hawary ◽  
Farouk Rasmy Melek ◽  
Dalia Saleh ◽  
Omar M. Ali ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Particle Size ◽  
Zinc Oxide ◽  
Plant Extract ◽  
Particle Size Analysis ◽  
Size Analysis ◽  
Alcoholic Extract ◽  
Zno Nps ◽  
Subtype B ◽  
Average Size

Zinc oxide nanoparticles (ZnO NPs) were synthesized by using an alcoholic extract of the flowering aerial parts of Plumbago auriculata Lam. Dynamic Light Scattering (DLS) revealed that the average size of synthesized ZnO NPs was 10.58 ± 3.350 nm and the zeta potential was −19.6 mV. Transmission electron microscopy (TEM) revealed that the particle size was in the range from 5.08 to 6.56 nm. X-ray diffraction (XRD) analysis verified the existence of pure hexagonal shaped crystals of ZnO nanoparticles with an average size of 35.34 nm in the sample, which is similar to the particle size analysis acquired by scanning electron microscopy (SEM) (38.29 ± 6.88 nm). HPLC analysis of the phenolic ingredients present in the plant extract showed that gallic acid, chlorogenic acid, and catechin were found as major compounds at concentrations of 1720.26, 1600.42, and 840.20 µg/g, respectively. Furthermore, the inhibitory effects of ZnO NPs and the plant extract against avian metapneumovirus (aMPV) subtype B were also investigated. This assessment revealed that the uncalcinated form of Nano-ZnO mediated by P. auriculata Lam. extract possessed a significant antiviral activity with 50% cytotoxic concentration (CC50) and 50% inhibition concentration (IC50) of 52.48 ± 1.57 and 42.67 ± 4.08 µg/mL, respectively, while the inhibition percentage (IP) was 99% and the selectivity index (SI) was 1.23.

Ball Milling of WC-Co Powder as Injection Molding Feedstock

2011 ◽  
Vol 110-116 ◽  
pp. 1425-1430
Author(s):  
Sri Yulis M. Amin ◽  
Norhamidi Muhamad ◽  
Khairur Rijal Jamaludin ◽  
Abdolali Fayyaza ◽  
Heng Shye Yunn
Keyword(s):  
Particle Size ◽  
Ball Milling ◽  
Particle Morphology ◽  
Particle Size Analysis ◽  
Size Analysis ◽  
Elemental Distribution ◽  
Wet Milling ◽  
Particle Size Reduction ◽  
Milling Medium ◽  
Wet Condition

In this paper, an attempt has been made to mill constituent of WC and Co powder towards achieving volumetric percentage of WC (91%) and Co (9%). The ball milling technique was conducted under dry and wet condition using various milling parameters, rotation speed, time and ethanol as milling medium. Electron dispersive spectrometer (EDS) detected the elemental distribution, whilst SEM and particle size analysis was done to study the effect of changes in particle morphology and reduction of particle size. As a conclusion, powder milled by parameter of wet milling by ethanol, speed of rotation at 250 rpm and 90 minutes of milling time exhibits best results in term of volumetric percentage of 91%WC and 9%Co and particle size reduction.

Characterization of Al/SiC Nanocomposite Prepared by Mechanical Alloying Method

2007 ◽  
Vol 553 ◽  
pp. 257-265 ◽  
Author(s):  
Ali Shokuhfar ◽  
M.R. Dashtbayazi ◽  
M.R. Alinejad ◽  
Tolou Shokuhfar
Keyword(s):  
Particle Size ◽  
Mechanical Alloying ◽  
Research Work ◽  
High Energy ◽  
Particle Size Analysis ◽  
Size Analysis ◽  
High Energy Ball Mill ◽  
Energy Ball ◽  
Nanocomposite Powders

In this research work, a high-energy ball mill has been applied to prepare an Al/SiC nanocomposite. The formation mechanism of the nanocomposite was investigated. This nanocomposite contained the nanocrystalline characteristics. Crystallite size, lattice strain and particle size of the nanocomposite as a function of milling time were determined. SEM micrographs showed that the nanocomposite powders agglomerated after milling. The particle size analysis confirmed the agglomeration of the nanocomposite particles. TEM observations showed that the SiC particles were in the nanometer size and these particles embedded in the Al matrix, and the nanocomposite produced in the final stage of mechanical alloying. In addition, a simple model checked for the refinement of the crystallite and the particle size of nanocomposite.

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