Production of martite nanoparticles with high energy planetary ball milling for heterogeneous Fenton-like process

RSC Advances ◽  
2016 ◽  
Vol 6 (84) ◽  
pp. 81219-81230 ◽  
Author(s):  
Amir Rahmani ◽  
Alireza Khataee ◽  
Baris Kaymak ◽  
Behrouz Vahid ◽  
Mehrangiz Fathinia ◽  
...  
Keyword(s):  
Ball Milling ◽  
Ball Mill ◽  
High Energy ◽  
Planetary Ball Mill ◽  
Heterogeneous Fenton ◽  
Planetary Ball Milling

Natural martite microparticles (NMMs) were prepared with a high energy planetary ball mill to form a nanocatalyst for a Fenton-like process.

Amelioration of Hydrogen Uptake and Release Features of Magnesium Adding a Polymer Polyvinylidene Fluoride via Milling in Hydrogen in a Planetary Ball Mill

2020 ◽  
Vol 20 (11) ◽  
pp. 7105-7113
Author(s):  
Young Jun Kwak ◽  
Myoung Youp Song
Keyword(s):  
Ball Milling ◽  
Ball Mill ◽  
Polyvinylidene Fluoride ◽  
Hydrogen Uptake ◽  
Hydrogen Atmosphere ◽  
Hydrogen Release ◽  
Planetary Ball Mill ◽  
Planetary Ball Milling ◽  
Milling In Hydrogen ◽  
Uptake And Release

In the present study, a polymer polyvinylidene fluoride (PVDF) was chosen as an adding material to ameliorate hydrogen uptake and release features of Mg. Samples with a composition of 95 wt.% Mg+5 wt.% PVDF (called 95Mg + 5PVDF) were made via milling in hydrogen atmosphere in a planetary ball mill (reactive planetary ball milling). The hydrogen release reaction of magnesium hydride formed in the as-prepared 95Mg+5PVDF during reactive planetary ball milling started at 681 K. In the third cycle (CN = 3), the amount of hydrogen absorbed for 60 min, A (60 min), was 3.44 wt.% hydrogen at 573 K in 12 bar hydrogen. The PVDF is believed to have melted during reactive planetary ball milling, and the sliding or lubrication between Mg particles and hardened steel balls was avoided, leading to a good contact between them and a highly effective milling. The milling in hydrogen atmosphere in a planetary ball mill of Mg with PVDF is believed to have generated defects and cracks. The Mg2C3 produced from PVDF during hydrogen uptake-release cycling is believed to have been spread among particles and to have kept particles from coalescing. To the best of our knowledge, this is the first study to use a polymer PVDF as an additive material for the amelioration of hydrogen uptake and release features of Mg.

Influence of Ball Milling Parameters on Preparation of Ti50Cu23Ni20Sn7 Amorphous Alloys Powder

2011 ◽  
Vol 55-57 ◽  
pp. 819-824
Author(s):  
Ge Wang ◽  
Qiang Li ◽  
Ying Gao ◽  
Jing Na Gao ◽  
Yu Ying Zhu ◽  
...  
Keyword(s):  
Mechanical Alloying ◽  
Ball Milling ◽  
Amorphous Alloys ◽  
Ball Mill ◽  
Milling Time ◽  
Rotational Velocity ◽  
Weight Ratio ◽  
High Energy ◽  
Planetary Ball Mill ◽  
Milling Parameters

Ti50Cu23Ni20Sn7 amorphous alloys powder was prepared by mechanical alloying (MA) in a high-energy planetary ball mill. Milling parameters such as rotational velocity of ball mill, ball to powder weight ratio as well as milling time were throughly investigated. Mechanism of mechanical alloying was throughly discussed.

Preparation of graphene oxide by dry planetary ball milling process from natural graphite

RSC Advances ◽  
2016 ◽  
Vol 6 (15) ◽  
pp. 12657-12668 ◽  
Author(s):  
Pranita Dash ◽  
Tapan Dash ◽  
Tapan Kumar Rout ◽  
Ashok Kumar Sahu ◽  
Surendra Kumar Biswal ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Ball Milling ◽  
High Energy ◽  
Milling Process ◽  
Graphene Oxides ◽  
Natural Graphite ◽  
Ball Milling Process ◽  
Planetary Ball Milling

Graphene oxides (GO) with different degrees of oxidation have been prepared by an in-house designed horizontal high energy planetary ball milling process.

Isosymmetric structural phase transition of the orthorhombic lanthanum gallate structure as a function of temperature determined by Rietveld analysis

CrystEngComm ◽  
2018 ◽  
Vol 20 (37) ◽  
pp. 5562-5569
Author(s):  
Y. Q. Tang ◽  
C. López-Cartes ◽  
M. A. Avilés ◽  
J. M. Córdoba
Keyword(s):  
Phase Transition ◽  
Ball Milling ◽  
Structural Phase Transition ◽  
Structural Phase ◽  
Rietveld Analysis ◽  
High Energy ◽  
Lanthanum Gallate ◽  
Air Atmosphere ◽  
Planetary Ball Milling

High energy planetary ball milling has been used to synthesize pseudo-cubic highly-pure LaGaO3 in one hour from its oxide components in an air atmosphere.

Properties of Ultrafine-Grained Tungsten Prepared by Ball Milling and Spark Plasma Sintering

2016 ◽  
Vol 821 ◽  
pp. 399-404 ◽  
Author(s):  
Monika Vilémová ◽  
Barbara Nevrlá ◽  
Zdenek Pala ◽  
Lenka Kocmanová ◽  
Marek Janata ◽  
...  
Keyword(s):  
Ball Milling ◽  
Spark Plasma Sintering ◽  
Ball Mill ◽  
Planetary Ball Mill ◽  
Coarse Grained ◽  
First Wall ◽  
Fine Grained ◽  
Plasma Sintering ◽  
Ultrafine Grained ◽  
Spark Plasma

Tungsten is currently considered as the most suitable plasma facing material for the first wall of a nuclear fusion reactor. First wall will be subjected to harsh conditions that will gradually deteriorate properties of the wall material. Some studies point out that fine-grained tungsten could be more resistant to the structure and property changes than coarse-grained tungsten. However, tailoring of tungsten microstructure is very laborious. Due to its high melting point, tungsten is very often processed mechanically and subsequently sintered into a compact body. In this study, preparation of ultrafine-grained tungsten by mechanical processing in a planetary ball mill was examined. Three types of tungsten samples were compared. One was made from coarse grained tungsten powder consolidated by SPS (spark plasma sintering). Other two samples were prepared from the powder processed in a planetary ball mill with and without addition of Y2O3. After ball milling, the powders were consolidated by SPS, i.e. fast sintering process that allows preserving fine-grained structure of the powder material. Properties of the samples such as hardness and thermal conductivity were examined and correlated with the processing history and microstructure.

scholarly journals THE PHYSIOLOGICAL AND HYGIENIC EVALUATION OF THE OPERATOR’S WORKING CONDITIONS IN THE SYNTHESIS OF CHROMIUM DISILICIDE NANOCRYSTALLINE POWDERS BY HIGH-ENERGETICAL MECHANOACTIVATION METHOD

2017 ◽  
pp. 89-95
Author(s):  
A. P. Yavorovskiy ◽  
N. V. Solokha ◽  
O. V. Demetskaya ◽  
I. M. Andrusishina
Keyword(s):  
Mechanical Activation ◽  
Technological Process ◽  
Working Conditions ◽  
Ball Mill ◽  
High Energy ◽  
Working Environment ◽  
Planetary Ball Mill ◽  
Emission Spectrometry ◽  
Activation Process ◽  
Plant Design

Objective: to carry out the physiological and hygienic evaluation of the working conditions of operators producing chromium disilicide nanopowders by high-energetical mechanoactivation method and to develop the preventive recommendations. Material and methods. The object of research was the technological process of producing nanocrystalline chromium disilicide powder within a planetary ball mill. The hygienic assessment of the technological process, technological equipment and psycho-physiologic evaluation of the working environment of the operators were carried out using the generally accepted psychophysiological, hygienic, and chronometer methods of study. The concentration of nanoparticles in the working area was measured using the diffusion aerosol spectrometer DAS-2702 («Aeronanoteh», Russia), the nanopowder particle size was measured by the device Analysette 12 DynaSizer («Fritsch», Germany), the chemical composition of air samples was determined by atomic emission spectrometry with inductively coupled plasma (ICP-AES) using the device «Ortima 2100 DV» («Perkin-Elmer», USA). Results. It was found out for the first time that the mechanical activation process was accompanied by emission of nano-sized chromium into the air of the working area, which had not been detected before the beginning of the work. The total concentration of nanoparticles in the main room was 1.6-1.9 times higher than that in the working area of the planetary ball mill and exceeded the test levels recommended for nanomaterials in European countries. Conclusion. The basic adverse factors in case of producing nanopowder of chromium disilicide by mechanoactivation method are presence of nanoparticles of metals in the workplace air and intensity of work. We have proposed hygienic recommendations which are aimed at improving the plant design for the high-energy mechanical activation in the direction of ensuring tightness, reduction of manual work operations, audible and visual signaling during the technological process.

Exploratory studies on nanobiocide for wood preservation

2014 ◽  
Vol 37 (1) ◽  
pp. 9-16
Author(s):  
Aparna Kalawate
Keyword(s):  
Zinc Oxide ◽  
Copper Oxide ◽  
Copper Sulphate ◽  
Mechanical Milling ◽  
Ball Mill ◽  
High Energy ◽  
Planetary Ball Mill ◽  
Wood Preservation ◽  
Bond Quality

Nanotechnology presents a tremendous opportunity to boost the field of wood preservation through implementing modern and unique metal biocides with improved properties. Nano form of Copper oxide, Zinc oxide and Copper sulphate were made by mechanical milling in the high energy planetary ball mill with 450 rpm for 12 hours. Among the three tested nanobiocides Copper sulphate at 0.5% concentration provided protection to the plywood against wood destroying organisms without sacrificing the bond quality of plywood. This is the first report to develop and test the efficacy of nanobiocide against wood destroying organism in India.

Sign in / Sign up

Export Citation Format

Share Document