The nanocomposite WC–MgO powders were prepared at room temperature by reactive milling of low-cost WO 3, Mg and graphite powders under argon gas atmosphere in a planetary ball milling.Powder samples were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The milling energy was …

The morphologies of Ag–15SnO 2 and Ag–30SnO 2 powders after high energy ball milling are shown in Fig. 1 (a) and (b), respectively. It is shown that the as milled Ag–15SnO 2 powders have an irregular blocky shape with an average size of approximately 20 μm. The as milled Ag–30SnO 2 powders are irregularly blocky shaped …

Microstructure refinement and physical properties of Ag-SnO2 based contact materials prepared by high-energy ball milling

XRD pattern for sample „A″ after high-energy ball-milling process of a mixture of powders: sulfur (+) with metallic tin (*). After two-stage thermal treatment in nitrogen flow, consisting of 3 h annealing at 500 °C followed by 5 h annealing at 800 °C – sample „B″, the single-phase of tin sulfide (SnS) (*) was obtained ( Fig. 3 ).

Section snippets Synthesis of N/P co-doped carbon. The ball-milled sawdust (Jiangsu, China) was prepared by our previous methods [11], then the 3 g ball-milled sawdust was mixed in 9 g [Bmim]H 2 PO 4 (Lanzhou Institute of Chemistry Physics, China) with constant stirring. Then the product was held at 800 ℃ in nitrogen and held for 240 min.

The electrodes exhibit high ICEs with an average of 80.8%, 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 ...

The powders were sealed under a high purity argon atmosphere in a hardened steel vial with chromium-steel balls of 6.4 mm in diameter, unless otherwise stated. Milling was performed in a Spex 8000 mixer/mill using a ball-to-powder mass ratio of 10:1. The as-milled powder was subsequently heat treated in an air atmosphere to …

Microstructure refinement and physical properties of Ag-SnO2 based contact materials prepared by high-energy ball milling . × Close Log In. Log in with Facebook Log in with Google. or. Email. Password. Remember me on this computer. or reset password. Enter the email address you signed up with and we'll email you a reset link. ...

The SnO 2 powder was produced by two different chemical reactions, initiated by ball milling. It should be noted that water vapor in the milling vessel, or produced by …

In this study, we adopted two-step simple and scalable ball milling that effectively synthesized a sandwich structured C/Si@SnO 2 with a buffer layer of porous …

In this present work, SnO 2 @Al 2 O 3 /C composites anode was successfully prepared by a facile one step hydrothermal method and further ball milling. The reversible capacity, cycling stability, and rate performance of the as-prepared nanocomposites (NCs) are significantly improved, which are benefited from the synergy between SnO 2 and Al 2 …

Mechanical milling is a promising route for production of submicron and nano sized silicon powders, but it is challenging to predict and control the product properties. In this study a metallurgical grade silicon quality was milled in a planetary ball mill and the properties of the powder were investigated as a function of grinding time, grinding bead …

Titanium dioxide (TiO2) is widely used for applications in heterogeneous photocatalysis. We prepared nanocrystalline powders of the anatase as well as the rutile modification by high-energy ball milling of the coarse grained source materials for up to 4 h. The resulting average grain size was about 20 nm. The morphology of the powders was investigated …

2.1.2 High-energy ball milling. High-energy ball milling is a mechanical deformation process that is frequently used for producing nanocrystalline metals or alloys in powder form. This technique belongs to the comminution or attrition approach introduced in Chapter 1. In the high-energy ball milling process, coarse-grained structures undergo ...

The hybrid TiO2-C matrix synthesized via two-step high-energy ball milling effectively regulated the irreversible lithiation/delithiation of the active Sn electrode and facilitated Li-ion diffusion.

High-energy ball milling (HEBM) of powders is a complex process involving mixing, morphology changes, generation and evolution of defects of the crystalline lattice, and formation of new phases. This review is dedicated to the memory of our colleague, Prof. Michail A. Korchagin (1946–2021), and aims to highlight his works on the synthesis of …

High energy ball milling was used in order to improve dispersion of metal oxide in Ag-SnO2 electrical contact materials. The …

Tin selenide (SnSe) is a potential candidate for sodium-ion battery anodes owing to its high theoretical capacity, environmental benignity, and abundant resources. Herein, the resulting SnSe anodes are synthesized by mechanochemical route employing a high-energy ball mill without addition of carbon during the synthesis. This green …

In addition to high energy density, ... The improvement in the electrochemical performance of LFP-4 cathode (prepared by ball milling) was further supported by electrochemical impedance studies.

Fig. 1 Preparation of Ag/SnO2 composite powders by high-energy ball milling process. collected after drying for 90 min in a vacuum dryer. The dried precursor powders were …

Nanostructuring is a commonly employed method of obtaining superior mechanical properties in metals and alloys. Compared to conventional polycrystalline counterparts, nanostructuring can provide remarkable improvements in yield strength, toughness, fatigue life, corrosion resistance, and hardness, which is attributed to the …

by high-energy ball milling and subsequently consolidated to bulk solid pieces by conventional powder metallurgy method. The obtained electrical contact materials were then evaluated in terms of their physical properties. 2. Experimental The studied Ag-SnO2 and Ag-SnO2In2O3 contact materials were prepared using pure

The effects of stearic acid on the high-energy ball milling of tin powder have been investigated. The mean crystallite sizes, microstrain, and phase transformations were examined using different ...

Semantic Scholar extracted view of "Transformations in Oxides Induced by High-Energy Ball-Milling" by V. Šepelák et al. ... Mechanochemical modification of low-dispersed SnO2 and high-dispersed SnO(OH)2 powders with specific surface area 6 and 198 m2 g−1 have been studied. ... Cu2S nanoparticles prepared in the explosive manner …

In high-energy ball milling, powders and heavy steel or tungsten carbide are loaded together in a container, and shaking or high-speed rotation is applied to transfer the high energy on the loaded powder; the collision between balls generates the energy. However, high-energy ball milling has certain drawbacks such as contamination …

The hydrogen desorption properties of Magnesium Hydride (MgH 2) ball milled with cassiterite (SnO 2) have been investigated by X-ray powder diffraction and thermal analysis.Milling of pure MgH 2 leads to a reduction of the desorption temperature (up to 60 K) and of the activation energy, but also to a reduction of the quantity of …

Nanocrystalline eta-Cu6Sn5 alloy powders were prepared by high energy ball-milling. Lithium ions can be electrochemically inserted into Cu6Sn5 electrodes, alloying with Sn to form LixSn alloys ...

M − 10C (M = Mg10Ni, C = EG (expandable graphite), SnO2 (stannic oxide), EG-SnO2) composites with various compositions were integrated by high-energy ball milling (HEBM), and their H2 production ...

In this study, high-energy ball milled (HEBM) ZnO nanoparticles milled at two different milling time intervals (15 min and 10 h) were attached onto the surface of graphene oxide (GO), followed by the reduction of the GO/ZnO to rGO/ZnO hybrid nanocomposite by using L-ascorbic acid. Defect induced morphological, structural and size dependent ...

Ball milling method was used to fabricate successfully tin dioxide (SnO₂)/multi-walled carbon nanotubes nanocomposite materials using SnCl₂ ×2H₂O as …