scholarly journals CHARACTERIZATION OF BAMBOO TUTUL CHARCOAL PARTICLE PRODUCED BY HIGH ENERGY BALL MILLING SHAKER TYPE

2019 ◽  
Vol 20 (2) ◽  
pp. 41-46
Author(s):  
S Supriyono ◽  
B. Susilo
Keyword(s):  
Particle Size ◽  
Ball Milling ◽  
Empty Space ◽  
High Energy ◽  
High Energy Ball Milling ◽  
Particle Sizes ◽  
Final Particle ◽  
Particle Size Analyzer ◽  
Energy Ball ◽  
Surface Morphologies

The objective of this study is to characterize bamboo tutul charcoal particles produced by High Energy Ball Milling (HBEM) shaker type. The HEBM process was conducted in the stainless steel vials for 2 million cycles at 900 motor RPM. The ball milling diameter was 1/4 inch made from steel. Therefore, perhaps the final particle size will be determined by empty space of the vial for the movement of the balls. In this study, the empty space is varied for 1/2, 1/3, 1/4, and 1/5 of vial volume. Particle Size Analyzer (PSA) is used to have the particle sizes and SEM-EDX is used to have surface morphology of the particle. The average final particle sizes are 547.8 nm, 522.9 nm, 422.7 nm, and 739.4 nm for 1/2, 1/3, 1/4, and 1/5 empty space of vial respectively. The surface morphologies of the particles are determined by fracture mechanism as they can be seen on the SEM results. Based on the results, it can be said that there is no correlation between the particle size and the empty space of the vial. As long as there is space for movement of the milling balls, the collision occurs and the reduction of the particle also happens.

scholarly journals CHARACTERIZATION OF BAMBOO TUTUL CHARCOAL PARTICLE PRODUCED BY HIGH ENERGY BALL MILLING SHAKER TYPE

2019 ◽  
Vol 20 (1) ◽  
pp. 43-48
Author(s):  
S Supriyono ◽  
B Susilo
Keyword(s):  
Particle Size ◽  
Ball Milling ◽  
Empty Space ◽  
High Energy ◽  
High Energy Ball Milling ◽  
Particle Sizes ◽  
Final Particle ◽  
Particle Size Analyzer ◽  
Energy Ball ◽  
Surface Morphologies

The objective of this study is to characterize bamboo tutulcharcoal particles produced by High Energy Ball Milling (HBEM)shaker type.The HEBM process was conducted in the stainless steel vialsfor 2 million cycles at 900 motor RPM. The ball milling diameter was 1/4 inch made from steel.Therefore, perhaps the final particle sizewill be determined byempty space of the vial for the movement of the balls. In this study, the empty space is varied for 1/2, 1/3, 1/4, and 1/5 of vial volume. Particle Size Analyzer (PSA) is used to have the particle sizes and SEM-EDX is used to have surface morphology of the particle. The average final particle sizes are 547.8 nm, 522.9 nm, 422.7 nm, and 739.4 nm for 1/2, 1/3, 1/4, and 1/5 empty space of vial respectively. The surface morphologies of the particles are determined by fracture mechanism as they can be seen on the SEM results. Based on the results, it can be said that there is no correlation between the particle size and the empty space of the vial. As long as there is space for movement of the milling balls, the collision occurs and the reduction of the particle also happens.

High Energy Ball-Milling of Tin Titanate Zirconate for Use in Microwave Applications

2006 ◽  
Vol 45 ◽  
pp. 480-485 ◽  
Author(s):  
V.L. Arantes ◽  
Dulcina P.F. Souza
Keyword(s):  
Particle Size ◽  
Dielectric Properties ◽  
Ball Milling ◽  
High Energy ◽  
Liquid Phase Sintering ◽  
High Energy Ball Milling ◽  
X Ray Diffraction ◽  
Microwave Frequencies ◽  
Particle Size Analyzer ◽  
Energy Ball

Tin titanate zirconate (ZTS) is widely known for its good dielectric properties at high frequencies and has been widely employed as a dielectric resonator. ZTS does not sinter easily by solid state difusion and it is necessary to introduce sintering aids capable of increasing diffusion coefficients and/or leading to liquid phase sintering. Consequently, the dielectric properties in microwave frequencies can be reduced. This work focused on the utilization of high energy ball-milling as a method of reducing initial particle size and further improving sintering of ZTS.The powders obtained were characterized by X-ray diffraction as a function of milling time, as well as by a light scattering particle size analyzer.

Structure and Magnetic Properties of NdFeB Powder Prepared by Hydrogen Decrepitation and High-Energy Ball Milling

2014 ◽  
Vol 604 ◽  
pp. 262-266 ◽  
Author(s):  
Zoryana Mural ◽  
Lauri Kollo ◽  
Rainer Traksmaa ◽  
Kaspar Kallip ◽  
Joosep Link ◽  
...  
Keyword(s):  
Particle Size ◽  
Magnetic Properties ◽  
Ball Milling ◽  
Magnetic Moments ◽  
Weight Ratio ◽  
High Energy ◽  
High Energy Ball Milling ◽  
Final Particle ◽  
Energy Ball ◽  
Hydrogen Decrepitation

An ingot of NdFeB alloy was disintegrated by hydrogen decrepitation (HD). High-energy ball milling technique with hard metal milling elements and balls was employed to refine HD powders down to particle size optimum for magnet processing. The experiments were performed according to experimental plan to optimize the milling parameters regarding particle size, contamination and magnetic properties of the powder. The effect of milling time, speed of rotation, ball-powder weight ratio (BPR) and amount of wet agent was investigated. The highest influence was shown to be from attritor speed of rotation, ball-to powder ratio and combined effect of milling wet agent and rotating speed. Unified parameter of estimated number of total ball impacts was calculated, which allows predicting the final particle size of the powder at different milling speeds. Magnetic moments of powders were measured.

Nanostructured Al Powder Obtained by High Energy Ball Milling at Ambient and Cryogenic Temperatures

2014 ◽  
Vol 802 ◽  
pp. 125-129
Author(s):  
Heronilton Mendes de Lira ◽  
Pilar Rey Rodriguez ◽  
Oscar Olimpio de Araújo Filho ◽  
Cezar Henrique Gonzalez ◽  
Severino Leopoldino Urtiga Filho
Keyword(s):  
Particle Size ◽  
Ball Milling ◽  
High Performance ◽  
Pure Aluminum ◽  
High Energy ◽  
High Energy Ball Milling ◽  
Nanocrystalline Powders ◽  
Protective Atmosphere ◽  
Energy Ball ◽  
Size And Morphology

High performance nanostructured light metals and alloys are very interesting for replacing conventional heavier materials in many industrial components. High Energy Ball Milling and Cryomilling are useful techniques to obtain nanocrystalline powders. In this work the effect of several milling conditions such as rotation speed, time, ball to powder ratio and temperature on the crystallite and particle size and morphology in pure aluminum are presented. X-Ray Diffraction, Laser Diffraction and Scanning Electron Microscopy are used. High energy ball milling at ambient and cryogenic temperature of Al powders rapidly leads to a nanometer size down to about 35 nm. High ball to powder ratio promotes both low crystallite and particle size. Small crystallite size like 18 nm and particle size as 4 μm were achieved in the most energetic conditions at ambient temperature. Isopropyl alcohol used as liquid media and protective atmosphere has a strong influence on the results depending on the milling temperature of Al.

Reducing the crystallite and particle size of SrFe12O19 with PVA by high energy ball milling

2019 ◽  
Vol 771 ◽  
pp. 464-470 ◽  
Author(s):  
F.N. Tenorio Gonzalez ◽  
I.R. Barajas Rosales ◽  
P. Vera Serna ◽  
F. Sánchez de Jesus ◽  
A.M. Bolarin Miró ◽  
...  
Keyword(s):  
Particle Size ◽  
Ball Milling ◽  
High Energy ◽  
High Energy Ball Milling ◽  
Energy Ball

Mechanochemically synthesized m-BiVO4 nanoparticles for visible light photocatalysis

RSC Advances ◽  
2016 ◽  
Vol 6 (19) ◽  
pp. 15796-15802 ◽  
Author(s):  
Q. Luo ◽  
L. Zhang ◽  
X. Chen ◽  
O. K. Tan ◽  
K. C. Leong
Keyword(s):  
Particle Size ◽  
Visible Light ◽  
Ball Milling ◽  
High Energy ◽  
High Energy Ball Milling ◽  
Visible Light Photocatalysis ◽  
Energy Ball ◽  
Photocatalytic Applications

Mechanochemical high energy ball milling approach was used to synthesize monoclinic BiVO4 (m-BiVO4) nanoparticles in an attempt to simultaneously reduce the particle size and improve the throughput for practical photocatalytic applications.

Microstructure of 430L Stainless Steel Powders during High-Energy Ball Milling

2007 ◽  
Vol 561-565 ◽  
pp. 1251-1254
Author(s):  
Hong Wei Ni ◽  
Hang He ◽  
G.Q. Li ◽  
Wei Ting Zhan ◽  
Da Qiang Cang ◽  
...  
Keyword(s):  
Particle Size ◽  
Grain Size ◽  
Stainless Steel ◽  
Ball Milling ◽  
High Energy ◽  
High Energy Ball Milling ◽  
X Ray Diffraction ◽  
Initial Stage ◽  
Energy Ball ◽  
The Mean

Preparation of nanocrystalline 430L stainless steel powders by high-energy ball milling has been investigated. The samples were characterized by scanning electron microscope (SEM), X-ray Diffraction (XRD) and Matersizer. The SEM observation confirmed that the cold welding and fragmentation behaviors occurred during high-energy ball milling, which has important effect on the changes of the particle size. In the initial stage (0-10h), particle size increased and crystalline grain size decreased evidently. The mean particle size got to 330μm and the crystalline grain size got to 23nm for sample of 10h ball milling. In the later stage, the particle size decreased and the refinement of crystalline grain became difficult. The crystalline grain size of sample for 50h ball milling only got to 15nm.

scholarly journals Hydroxyapatite/iron oxide nanocomposite prepared by high energy ball milling

2019 ◽  
Vol 13 (2) ◽  
pp. 210-217
Author(s):  
Milica Vucinic-Vasic ◽  
Bratislav Antic ◽  
Marko Boskovic ◽  
Aleksandar Antic ◽  
Jovan Blanusa
Keyword(s):  
Particle Size ◽  
Iron Oxide ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Ball Milling ◽  
High Energy ◽  
High Energy Ball Milling ◽  
X Ray Diffraction ◽  
X Ray ◽  
Energy Ball

Nanocomposites (HAp/iron oxide), made of hydroxyapatite (HAp) and ferrimagnetic iron oxide, were synthesized by high-energy ball milling a mixture consisting of iron oxide nanoparticles and the starting materials used for the HAp synthesis: calcium hydrogen phosphate anhydrous (CaHPO4), and calcium hydroxide (Ca(OH)2). Two HAp/iron oxide samples with the magnetic phase content of 12 and 30 wt.% were prepared and their microstructure, morphology and magnetic properties were analysed by X-ray diffraction and transmission electron microscopy. Furthermore, the measurement of particle size distribution was performed by laser scattering, and temperature/field dependence on magnetization was determined. X-ray diffraction data confirmed the formation of two-phased samples (HAp and spinel iron oxide) without the presence of any other parasite phase. The shape of particles was nearly spherical in both samples, ranging from only a few to several tens of nanometres in diameter. These particles formed agglomerates with the most common value of the number-based particle size distribution of 380 and 310 nm for the sample with 12 and 30wt.% of iron oxide, respectively. Magnetization data showed that both HAp/iron oxide composites had superparamagnetic behaviour at room temperature.

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