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  • Microstructural characterization of amorphous and

    Apr 01, 2008Microstructural parameters like crystallite size, lattice strain, stacking faults and dislocation density were evaluated from the X-ray diffraction data of boron nitride (BN) powder milled in a high-energy vibrational ball mill for different length of time (2-120 h), using different model based

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  • Simultaneous enhancement of natural sunlight

    2 composite was prepared by high-energy ball milling of commercial metal oxide powders. Analytically grade ZnO (99%, Sigma-Aldrich) and SnO 2 (99%, Kemika, Zagreb) powders in a 0.9 : 0.1 molar ratio (83 wt% : 17 wt%) were mechanically treated during 2 h in planetary ball mill (Across International PQ-NO4) with stainless steel vessels (100 ml) and

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  • Structural disorder of ball

    Nov 10, 2011Samples of Sn 1−x Fe x O 2−y were prepared by high-energy ball milling. Commercial SnO 2 and Fe 2 O 3 (Sigma-Aldrich, purity ≥99.9%) powders, and steel vials and balls (ball-to-powder mass ratio of 20:1) were used in a Fritsch Pulverissette 6 planetary mill operating with an angular velocity of 500 rpm. According to Sorescu et al. [], the solubility of Fe 2 O 3 in SnO 2 imposes a limit

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  • Facile synthesis of hierarchical CNF/SnO2/Ni

    Jun 20, 2018Hierarchical carbon nanofibre (CNF)/SnO 2 /Ni nanostructures of graphitized carbon nanofibres and SnO 2 nanocrystallines and Ni nanocrystallines have been prepared via divalent tin–alginate assembly on polyacrylonitrile (PAN) fibres, controlled pyrolysis and ball milling. Fabrication is implemented in three steps: (1) formation of a tin–alginate layer on PAN fibres by coating sodium

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  • Structural studies of nanocrystalline oxides

    We report the results of structural studies of samples of nanocrystalline tin oxide, zirconia, magnesia, alumina and silica, prepared by sol-gel techniques (including the addition of silica to restrict grain growth) and high-energy ball milling. XRD, EXAFS/YANES and MAS-NMR analyses were used to characterise the materials. EXAFS showed that nanocrystals of ZrO2 and SnO2 prepared by sol-gel

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  • Electrochemical response of nanocrystalline tetragonal

    The electrochemical and microstructural properties of nanometric tetragonal β-MnO 2 (MD) prepared by high-energy ball milling (BM) and spray pyrolysis (nano-β) were studied in comparison with the original volumetric phase (micro-β). The microstructure was characterized by X-ray diffraction and transmission electron microscopy. Electrochemical properties were studied by step linear

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  • HIGH ENERGY BALL MILLING

    The high energy ball milling technique permits production of composite powders suitable for application in thermal spray processes. Different milling systems are compared concerning their potential for production of composite powder feedstock for spraying processes. Hard phase materials like carbides or oxides are incorporated into various metallic

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  • Li conductivity of nanocrystalline Li4Ti5O12 prepared by a

    Iwaniak W, Fritzsche J, Zukalova M, Winter R, Wilkening M, Heitjans P. Li conductivity of nanocrystalline Li4Ti5O12 prepared by a sol-gel method and high-energy ball milling. Defect and Diffusion Forum . 2009 Apr;289-292:565-570.

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  • Preparation and photoluminescence properties of nano

    Jan 01, 2015The SrZnO 2:Sm 3+ nano-phosphors were synthesized by a high energy ball milling method. It was found that under ultraviolet excitation with a wavelength of 278 nm, the phosphor presented red luminescence that was attributed to the transitions from 5 D 4 excited states to 6 H J ground states of Sm 3+ ions. The crystallinity, morphology and particle size of SrZnO 2:Sm 3+ were

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  • Effect of High Energy Ball Milling on Structure and

    AgSnO2 powders prepared by atomization were treated by high energy ball milling. The effects of high energy ball milling on the morphology and sintering property of AgSnO2 powder were investigated. The results show that high energy ball milling can increase sintering properties of AgSnO2 powder, and improve the microstructure of the sintering billet and distribution of second phase particles

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  • Nonisothermal crystallisation kinetics of amorphous

    Differential scanning calorimetry (DSC) studies were performed under nonisothermal conditions at various heating rates for glassy Se made by high-energy ball milling. Comparisons were made between the ball-milling technique and the melt-quenching and thin-film techniques. Well-defined endothermic and exothermic peaks were observed at the glass-transition temperature,

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  • Sintering Behavior and Dielectric Properties of Bi3NbO7

    Dec 13, 2006The sintering behavior and dielectric properties of Bi 3 NbO 7 ceramics prepared by the high-energy ball milling (HEM) method and conventional mixed oxides method with V 2 O 5 addition were investigated. All the samples were sintered between 840 and 960C. For the ceramics prepared by the mixed oxides method, the pure tetragonal Bi 3 NbO 7 phase formed without any cubic phase.

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  • Frontiers

    Nov 26, 2019The precursor material of Ni0.8Co0.1Mn0.1(OH)2 was prepared by a co-precipitation method to obtain the layered cathode materials LiNi0.8Co0.1Mn0.1O2 (811) through roasting with LiOHH2O. Then the SnO2-modified samples were obtained by adding tin oxide into the ball mill. It was found by XRD characterization of the original and modified samples, that the addition of SnO2 did not

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  • Cathode Properties of Na3FePO4CO3 Prepared by the

    Feb 24, 2020Cathode properties of Na 3 MnPO 4 CO 3 prepared by the mechanical ball milling method for Na-ion batteries. Energies 12, 4534–4543 (2019).

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  • SnO2 nanoparticles functionalized MoS2 nanosheets as the

    May 22, 2019The MoS 2 nanosheets are synthesised either by bottom-up approaches, such as hydrothermal, chemical vapour deposition (CVD) or by top-down approaches, like, ball milling, mechanical exfoliation and liquid phase exfoliation [12, 16–19]. Among them, liquid phase exfoliation is the simple and high yielding route to prepare the MoS 2 nanosheets

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  • (PDF) CO sensitive nanocrystalline LaCoO3 perovskite

    The high energy milling was performed at 1000 rpm for 2 h. The as-milled powders were highly agglomerated with a low SSA (4 m 2 /g). A second milling step with lower energy and different milling times was performed in order to increase the specific surface area. A laboratory attritor containing 4.5 mm hardened steel balls was used in this step.

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  • (PDF) Magnetic properties of iron nitride

    Magnetic properties of iron nitride-alumina nanocomposite materials prepared by high-energy ball milling. Download. Magnetic properties of iron nitride-alumina nanocomposite materials prepared by high-energy ball milling. Raphael Hermann. Gary Long. Fernande Grandjean. S. Mishra. Sandipta Roy. N. Ali. Raphael Hermann. Gary Long.

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  • (PDF) Fe

    3 Results and discussion Figure 1a shows the XRD pattern of the sample prepared by mechanochemical milling with thermal treatment. Only Bragg peaks due to the presence of SnO2 rutile phase were observed. Figure 1b shows the XRD patterns for the high energy milled SnO2 mixed with metallic iron.

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  • Sintering behavior of Ag

    One such candidate system is Ag-Sn. This research investigates the microstructural evolution of Ag-Sn alloys, prepared via cryogenic high-energy ball milling, as well as their sinterability. Multiple Sn compositions were studied ranging from 6-15at%Sn.

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  • Preparing SnO2/MWCNT Nanocomposite Catalysts via High

    Ball milling method was used to fabricate successfully tin dioxide (SnO 2)/multi-walled carbon nanotubes nanocomposite materials using SnCl 2 2H 2 2)/multi-walled carbon nanotubes nanocomposite materials using SnCl 2 2H 2

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  • Hierarchical SnO2

    Hierarchical structure of carbon-coated SnO2 nanoclusters anchored on thin graphite sheets are prepared. • Impressive reversible capacity of 725 mAh g −1 is achieved by ball milling a mixture of SnO 2 with 20 wt. % graphite for 20 h. • Synthesis parameters such as graphite content and milling time are systematically examined.

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  • Tungsten Carbide Silver Contacts Prepared By High

    Oct 16, 2018Recently, compared with the traditional mechanical mixing process, the nano-sized WC-Ag contact material prepared by high-energy ball milling method has higher sintering density, hardness and conductivity. The tungsten carbide powder with average particle size of 1.06 micron, silver powder with particle size of - 300 mesh and nickel powder with

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  • Optimizing Performance of Li4Ti5O12 (LTO) by Addition of

    Li4Ti5O12/Sn was successfully synthesized by a solid-state method using the High Energy Ball Mill Machine as anode for Lithium-Ion batteries. The addition of various (10%, 20%, 30%) Sn-micro particle is aimed to enhance LTO's conductivity and capacity. Characterization of the sample's structure was performed using X-ray diffraction (XRD), which expose the presence of TiO2 rutile and Sn in each

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  • A scalable ternary SnO2

    May 25, 2018The electrodes exhibit high ICEs with an average of 80.8% and a reversible capacity of 780 mA h g(-1) at 0.2 A g(-1) after 400 cycles when the composite was manufactured via small planetary ball milling, and they achieve 875 mA h g(-1) after 250 cycles when the material is prepared on a large-scale with a roller mill.

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  • Polymer

    2006 (English) Doctoral thesis, comprehensive summary (Other scientific) Abstract [en] Compaction of polymer powders and polymer-based nanocomposites by uniaxial high-velocity cold compaction (HVC), by high-energy ball milling (HEBM) and using a novel technique, relaxation assists, was investigated with a focus on the process parameters, the compactibility characteristics, surface morphology

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  • Production of nanocrystalline powders by high

    May 19, 2008Nanocrystalline Nd 2 Fe 17 synthesized by high-energy ball milling: crystal structure, microstructure and magneticproperties; Strain analysis on freestanding germanium nanocrystals; Structural evolution and formation mechanisms of TiC/Ti nanocomposites prepared by high-energy mechanical alloying

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  • Structure and catalytic behaviour of CuO

    Feb 06, 2019High-energy vibratory ball milling (Super-Misuni, Nissin Giken Co. Ltd.) was employed, with a rotational speed of 710 r.p.m., where the milling atmosphere was ambient. The powders and zirconia balls (f10 mm) were charged in a stainless steel vial (f100 mm), where the ball-to-powder weight ratio was 18 : 1 (18 g balls per 1 g powder) and the

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  • sno2 prepared by high energy ball milling

    sno2 prepared by high energy ball milling . our products. DQ Mining is a high-tech company integrating RD, production and sales. It provides mature products and solutions such as crushers, sand making, milling equipment, mobile crushing stations, etc., for aggregate, mining and waste recycling.

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  • The investigation of microstructure and properties of in

    Aug 24, 2020In this study, in-situ Cu/TiC nanocomposites with 30 vol.% TiC reinforcement particles were synthesized via high energy ball milling and spark plasma sintering methods. After milling for 10 h at 500 rpm, composite powders were sintered at 800, 900 and 1000 C in vacuum environment under an applied pressure of 50 MPa.

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  • Improved Photocatalytic Properties of Bismuth Molybdate

    Bismuth molybdate (Bi2MoO6) was prepared through the solid-state route in the stoichiometric ratio followed by ball milling. The high-energy ball milling reduced the crystalline size from 96 to 35nm and increased the surface area from 0.351616 to10.7256 m/g in 5h. No structural change was observed.

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  • Tailoring the Charge/Discharge Potentials and

    Dec 12, 2019Such specific energy is superior to a comparable graphite/LNMO full-cell with 259 Wh kg −1, 28 while the energy efficiency is slightly lower compared to the latter system (above 90 %) – though in the same range as for lithium-ion full-cells comprising a silicon/carbon composite as anode and LNMO as cathode. 29 Upon cycling, however, the

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  • Nanocomposites based on low density

    Mar 10, 2019Nanocomposites based on low density polyethylene filled with carbon nanotubes prepared by high energy ball milling and their potential antibacterial activity. Erika Benigno. Department of Mechanical Engineering, Universidad Carlos III de Madrid, Madrid, Spain. Search for more papers by this author.

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