Influence of Particle Size and Calcination Temperature on the Abrasiveness of Garnet for Water Jet Cutting of Tough Materials

2018 ◽  
Vol 277 ◽  
pp. 17-26
Author(s):  
Mahmoud A. Rabah
Keyword(s):  
Particle Size ◽  
Water Jet ◽  
Maximum Temperature ◽  
Commercial Sample ◽  
Soaking Time ◽  
Water Jet Cutting ◽  
Heat Treated ◽  
Ft Ir ◽  
Higher Temperature

This study shows the influence of calcinations temperature and particle size of natural garnet mineral on its hardness and abrasiveness (H/A) for use in water jet cutting of tough materials. A standard commercial sample of the mineral was characterized in terms of the hardness and abrasiveness properties. The sample was sized to 4 fractions having the size of <60 um, > 60 < 100 um, > 100 < 200 um and > 200 < 250 um designated the symbols, FF, MF, MC and C respectively. Each fraction was separately heated in controlled conditions at temperatures up to 1000°C at a heating rate of 10°C/min in an electrically heated tube furnace. Soaking time at the maximum temperature was 60 minutes. Hardness and abrasiveness properties of the heat treated samples were tested to cut marble having a thickness of 30 mm. Results revealed that H/A of the garnet mineral increased by heating at temperatures up to 750°C and exhibited gradual decrease with higher temperatures up to 1000°C. Results were explained in the light of a structural irreversible metamorphism (SM) of the garnet crystals; almandine Fe2+ 3Al2Si3O12and propel Mg3Al2Si3O12. Metamorphism involved reorientation of the crystals followed by coherence to form dense grouping. At higher temperature, irreversible thermal expansion of the structure sets in. Characterization of the mineral was carried out with the help of XRD, SEM and FT-IR measurements.

Preparation and Characterization of Nanosize ZrO2 Particle for Highly Refractive Index Nanocomposite Depending on Zirconium Precursor and Concentration

2018 ◽  
Vol 922 ◽  
pp. 26-31
Author(s):  
Jeong Min Park ◽  
Hee Seon Lee ◽  
Hyung Mi Lim
Keyword(s):  
Particle Size ◽  
Refractive Index ◽  
Fourier Transform ◽  
Reaction Temperature ◽  
Monoclinic Phase ◽  
Precursor Concentration ◽  
Cubic Phases ◽  
Ft Ir ◽  
Higher Temperature

The ZrO2 nanoparticles for highly refractive index nanocomposite are synthesized according to reaction temperature, zirconium precursor concentration, and kinds of precursor such as zirconium iso-propoxide (ZIP) and zirconium n-propoxide (ZNP). At lower reaction temperature the monoclinic phase is formed, whilst higher temperature favors the tetragonal and cubic phases. As the precursor concentration increased, the particle size of ZrO2 nanoparticle slightly increased. TEM images prove that the ZrO2 nanoparticles are spherical and monodisperse with a diameter of about 4 nm. The synthesized ZrO2 was modified methacryloxy propyltrimethoxy silane (MPS) for dispersibility in organic solvent. Fourier transform infrared spectroscopy (FT-IR) and thermogravimetric analysis (TGA) illustrate that MPS are chemically attached to the surface of the ZrO2. The ZrO2 synthesized from ZNP and ZIP dispersed in o-phenylphenoxyethyl acrylate (OPPEA) is the highly transparent and the refractive index of this nanocomposite is 1.649 and 1.670, respectively.

Isolasi Dan Karakterisasi Bentonit Alam Menjadi Nanopartikel Monmorillonit

2018 ◽  
Vol 3 (1) ◽  
pp. 12 ◽  
Author(s):  
Zaimahwati Zaimahwati ◽  
Yuniati Yuniati ◽  
Ramzi Jalal ◽  
Syahman Zhafiri ◽  
Yuli Yetri
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Particle Size ◽  
Surface Morphology ◽  
Average Diameter ◽  
Particle Size Analyzer ◽  
Ft Ir ◽  
Scanning Electron ◽  
Sedimentation Processes

<p>Pada penelitian ini telah dilakukan isolasi dan karakterisasi bentonit alam menjadi nanopartikel montmorillonit. Bentonit alam yang digunakan diambil dari desa Blangdalam, Kecamatan Nisam Kabupaten Aceh Utara.  Proses isolasi meliputi proses pelarutan dengan aquades, ultrasonic dan proses sedimentasi. Untuk mengetahui karakterisasi montmorillonit dilakukan uji FT-IR, X-RD dan uji morfologi permukaan dengan Scanning Electron Microscopy (SEM). Partikel size analyzer untuk menganalisis dan menentukan ukuran nanopartikel dari isolasi bentonit alam. Dari hasil penelitian didapat ukuran nanopartikel montmorillonit hasil isolasi dari bentonit alam diperoleh berdiameter rata-rata 82,15 nm.</p><p><em>In this research we have isolated and characterized natural bentonite into montmorillonite nanoparticles. Natural bentonite used was taken from Blangdalam village, Nisam sub-district, North Aceh district. The isolation process includes dissolving process with aquades, ultrasonic and sedimentation processes.  The characterization of montmorillonite, FT-IR, X-RD and surface morphology test by Scanning Electron Microscopy (SEM). Particle size analyzer to analyze and determine the size of nanoparticles from natural bentonite insulation. From the research results obtained the size of montmorillonite nanoparticles isolated from natural bentonite obtained an average diameter of 82.15 nm.</em></p>

A Study on the Synthesis of SiC Powder from the Silicon Sludge of the Photovoltaic Industry

2012 ◽  
Vol 724 ◽  
pp. 49-52 ◽  
Author(s):  
Woo Teck Kwon ◽  
Soo Ryong Kim ◽  
Y. Kim ◽  
Yoon Joo Lee ◽  
Eun Jin Jung ◽  
...  
Keyword(s):  
Particle Size ◽  
Solar Cell ◽  
Silicon Powder ◽  
Point Of View ◽  
Economic Point ◽  
Heat Treated ◽  
Particle Size Analyzer ◽  
Different Temperatures ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

β-SiC powder was synthesized directly from silicon sludge with carbon black. Large amount of silicon sludge is generated from Solar Cell industry. In an environmental and economic point of view, recycling silicon sludge is important. In this study, two kinds of silicon sludge were characterized using XRD, SEM/EDS and FT-IR. SiC powder was synthesized by the reaction of ball-milled silicon powder for 3h in vacuum at different temperatures (1350 and 1600). Physical properties of the heat treated SiC have been characterized using a SEM, XRD, Particle size analyzer and FT-IR Spectroscopy.

Structural characterization of steam-heat treated Tectona grandis wood analyzed by FT-IR and 2D-IR correlation spectroscopy

2015 ◽  
Vol 26 (2) ◽  
pp. 221-225 ◽  
Author(s):  
Ming-Yu Li ◽  
Shi-Chao Cheng ◽  
Dan Li ◽  
Shen-Nan Wang ◽  
An-Min Huang ◽  
...  
Keyword(s):  
Structural Characterization ◽  
Tectona Grandis ◽  
Correlation Spectroscopy ◽  
2D Ir ◽  
Heat Treated ◽  
Ft Ir ◽  
Steam Heat

scholarly journals Solvothermal synthesis and characterization of magnetic Fe3O4 nanoparticle by different sodium salt sources

2017 ◽  
Vol 35 (1) ◽  
pp. 50-57 ◽  
Author(s):  
M. Jamshidiyan ◽  
A.S. Shirani ◽  
Gh. Alahyarizadeh
Keyword(s):  
Average Particle ◽  
Structural And Optical Properties ◽  
Commercial Sample ◽  
Xrd Pattern ◽  
Sodium Salts ◽  
Sem Image ◽  
Uranium Ions ◽  
Radioactive Wastewater ◽  
Ft Ir

AbstractFour different magnetic Fe3O4 nanoparticles were synthesized and characterized by solvothermal method based on different sodium salts. Sodium salts which were used to synthesize the nanoparticles were NaOAc, Na2CO3, a mixture of NaOAc and Na3Cit, and a mixture of NaOAc and Na2C2O4. The structural and optical properties of the synthesized nanoparticles were examined by XRF, XRD, SEM and FT-IR. The results estimated from XRD pattern and SEM image indicated that the second sample (Na2CO3) had the lowest average particle and crystallite size around 29 nm and 43 nm. It was also shown that the first (NaOAc) and second (Na2CO3) samples had the best FT-IR spectra, similar to the available commercial sample which was provided by Merck. At last, the prepared Fe3O4 nanoparticles were applied as sorbents to sorb uranium ions (U(VI)) from radioactive wastewater. The adsorption results showed that the highest U(VI) adsorption was obtained for the second sample in the solution with pH around 10.

Synthesis of Calcium Metaphosphates Fine Powders by Chemical Precipitation Methods

2010 ◽  
Vol 105-106 ◽  
pp. 532-535 ◽  
Author(s):  
Yin Zhang ◽  
De Shuang Kong ◽  
Ya Qiu Tao ◽  
Jian Ping Zhu ◽  
Neng Jian Yao
Keyword(s):  
Particle Size ◽  
Chemical Precipitation ◽  
Precipitation Method ◽  
Fine Powders ◽  
Heat Treated ◽  
Particle Size Analyzer ◽  
Powder Characteristics ◽  
Ft Ir ◽  
Phosphorus Precursor ◽  
Hydrolysis Of

Calcium metaphosphate (CMP) fine powders were produced by a chemical precipitation method. In order to produce the powders, CMP was prepared by the mixing of two precursors, such as calcium oxide (CaO) and phosphate acid (H3PO4). Sparingly soluble chemicals, the Ca/P ratio of the mixture was set to be 0.50 to produce stoichiometric CMP, were chemical agitated in phosphate acid solution. At least 3 hours of pre-hydrolysis of phosphorus precursor were required to obtain CMP phase. The CMP powders were dried in a drying oven at 60°C for 72 hours and then heat-treated at various temperatures at a ramp of 1°C /min in air for various hours. The obtained powder was analyzed using XRD, XRF, FT-IR, SEM, TG-DTA, Zeta Potential Meter, Specific Surface Area, and Particle Size Analyzer. The results showed that obtained CMP powders have a significantly powder characteristics.

Characterization of Well-Dispersed CeO2 Nanoparticles Prepared by a New Method of Reverse Microemulsion

2011 ◽  
Vol 194-196 ◽  
pp. 781-784
Author(s):  
Fa Mei Feng ◽  
Jia Qing Xie ◽  
Li Ke Zou ◽  
Bin Xie
Keyword(s):  
Particle Size ◽  
Fourier Transform ◽  
Ceo2 Nanoparticles ◽  
Size Distributions ◽  
X Ray ◽  
Transmission Electron ◽  
Particle Size Analyzer ◽  
Ft Ir ◽  
Cubic Structure

Well-dispersed CeO2 nanoparticles were successfully prepared in a simple system composed of sodium bis (2-ethylhexyl) sulfosuccinate (AOT)- octane-water (W/O) microemulsion in this paper. The morphology and microstructure of the products were characterized by the laser particle size analyzer, Fourier transform infrared spectroscopy (FT-IR), X-ray diffractometer (XRD), differential scanning calorimeter (DSC) and transmission electron microscope (TEM). It was found that the CeO2nanoparticles obtained from this method have well-proportioned size distributions; the surfactant (AOT) molecule was adsorbed on the surface of CeO2nanoparticles precursor, which is favorable for the dispersion of CeO2nanoparticles; the CeO2nanoparticles calcined was a crystal of the cubic structure. In addition, the mechanism on the formation of the CeO2nanoparticles was also proposed in this paper.

scholarly journals KARAKTERISASI FISIKOKIMIA NANOKRISTAL EKSTRAK HERBA SELEDRI ( Apium graveolens L.) DENGAN PERBEDAAN KONSENTRASI POLOXAMER188

2020 ◽  
Vol 4 (1) ◽  
pp. 31-39
Author(s):  
Henni Rosaini ◽  
Rina Wahyuni ◽  
Boyke Panata Sinaga ◽  
Wahyu Margi Sidoretno
Keyword(s):  
Particle Size ◽  
Apium Graveolens ◽  
Poloxamer 188 ◽  
Marker Compound ◽  
Biopharmaceutics Classification System Class ◽  
Particle Size Analyzer ◽  
Ft Ir ◽  
Low Solubility ◽  
Grinding Time

Celery (Apium graveolens L) is a plant of Apiaceae family which contains flavonoids, saponins, tannins, essential oils, apiin, apigenin, choline, asparagine, vitamin A, B, C. Apigenin contained in celery included in the BCS (Biopharmaceutics Classification System)  class II, which has low solubility and high permeability drugs. One method for increasing solubility is the nanocrystal method. Where the purpose of this study was to see the effect of differences in the concentration of poloxamer 188 on the characterization of nanocrystal. The results of the particle size analyzer (PSA) showed particle size distribution in formula 1 the concentration of poloxamer 188 40% 6 hour grinding time of 1648.5 nm with a potential zeta value of -11.2. While the formula 2 concentration of poloxamer 188 50% and formula 3 the concentration of poloxamer 188 60% with a 5 hour grinding time of 1049.6 and 1483.2 with a potential zeta value of -12.5 and -8.9. From the FT-IR analysis shows the presence of clusters in formulas 1, 2, and 3 which are not found in apigenin which is a celery marker compound, on the contrary there are groups on apigenin which are not found in formulas 1, 2, and 3.

Preparation and Characterization of Aqueous Polyurethane Polyol Used in Waterbore Two-Component Polyurethane Coating

2013 ◽  
Vol 470 ◽  
pp. 53-57
Author(s):  
Xiao Yi Geng ◽  
Zhi You Hu ◽  
Fei Yang ◽  
Li Juan Zhang ◽  
Meng Qian Li ◽  
...  
Keyword(s):  
Particle Size ◽  
Mechanical Analysis ◽  
Toluene Diisocyanate ◽  
Polyester Polyol ◽  
Water Dispersible ◽  
Polyurethane Film ◽  
Two Component ◽  
Ft Ir ◽  
The Fourier Transform

Aqueous polyurethane(PU) polyols were synthesized from polyester polyol, toluene diisocyanate(TDI), dimethylolbutyric acid (DMBA) and diethanolamine(DEA). The structure of PU polyol and resulting polyurethane film were confirmed by the Fourier Transform Infrared Spectroscopy (FT-IR). The effects of NCO/OH and DMBA content on the particle size of PU polyol and resulting polyurethane films, which formed by the mixture of PU polyol and water-dispersible polyisocyanate, was investigated by dynamic light scattering analysis, dynamic mechanical analysis and measurement of the mechanical properties.The results show the increase in DMBA content or NCO:OH ratio may be used to decrease the particle size of aqueous polyurethane polyol, increase the Tg for two-component aqueous PU film and maybe adjust the mechanical properties of resulting film.

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