Results 21 to 30 of about 80,916 (306)

Hydroxyapatite/iron oxide nanocomposite prepared by high energy ball milling [PDF]

open access: yesProcessing and Application of Ceramics, 2019
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 ...
Milica Vučinić Vasić   +4 more
doaj   +1 more source

Onset of chaotic dynamics in a ball mill: attractors merging and crisis induced intermittency [PDF]

open access: yes, 2002
In mechanical treatment carried out by ball milling, powder particles are subjected to repeated high-energy mechanical loads which induce heavy plastic deformations together with fracturing and cold-welding events.
Delogu F.   +5 more
core   +2 more sources

Fast and efficient approach to synthesis of ultra-fine TiC powder

open access: yesMaterials Research Express, 2019
A fast and large scalable process to produce TiC powder was obtained using a horizontal rotary ball mill within 60 min via a mechanically induced self-propagating reaction (MSR).
Chang-Jiang Yang
doaj   +1 more source

Effect of milling atmosphere on structural and magnetic properties of Ni–Zn ferrite nanocrystalline [PDF]

open access: yes, 2015
Powder mixtures of Zn, NiO, and Fe2O3 are mechanically alloyed by high energy ball milling to produce Ni–Zn ferrite with a nominal composition of Ni0.36Zn0.64Fe2O4. The effects of milling atmospheres (argon, air, and oxygen), milling time (from 0 to 30 h)
Ebrahimi-Kahrizsangi, Reza   +3 more
core   +1 more source

Effect of high-energy ball milling in the structural and textural properties of kaolinite

open access: yesCerâmica, 2014
Through the process of high-energy ball milling it is possible to obtain solid materials with higher surface area and different particle sizes. These characteristics are very important for some application such as adsorption.
E. C. Leonel   +4 more
doaj   +1 more source

Preparation of high crystalline nanoparticles of rare-earth based complex pervoskites and comparison of their structural and magnetic properties with bulk counterparts

open access: yes, 2017
A simple route to prepare Gd$_{0.7}$Sr$_{0.3}$MnO$_3$ nanoparticles by ultrasonication of their bulk powder materials is presented in this article. For comparison, Gd$_{0.7}$Sr$_{0.3}$MnO$_3$ nanoparticles are also prepared by ball milling.
Ahmmad, Bashir   +4 more
core   +1 more source

Mechanochemical synthesis and characterization of nanodimensional iron–cobalt spinel oxides [PDF]

open access: yes, 2009
Iron–cobalt spinel oxide nanoparticles, CoxFe3−xO4 (x = 1, 2), of sizes below 10 nm have been prepared by combining chemical precipitation with high-energy ball milling. For comparison, their analogues obtained by thermal synthesis have also been studied.
Estournès, Claude   +7 more
core   +2 more sources

Modelling of the High-Energy Ball Milling Process

open access: yesAdvances in Materials Physics and Chemistry, 2021
In this paper, the milling parameters of high energy ball mill (Fritsch Pulverisette 7) like vial geometry, number and size of balls and speed of the mill were modelled and discussed. Simulations through discrete element method (DEM) provide correlation between the milling parameters.
openaire   +2 more sources

A novel technology for minimizing the synthesis time of nanostructured powders in planetary mills [PDF]

open access: yesMaterials Research, 2014
A key objective in processing of nanostructured powders via high energy ball milling is to minimize the synthesis time. This paper presents the application of imperialist competitive algorithm (ICA) for optimization of milling parameters in order to ...
Majid Abdellahi, Maryam Bahmanpour
doaj   +1 more source

Dissociating stable nitrogen molecules under mild conditions by cyclic strain engineering [PDF]

open access: yes, 2019
All quiet on the nitrogen front. The dissociation of stable diatomic nitrogen molecules (N-2) is one of the most challenging tasks in the scientific community and currently requires both high pressure and high temperature.
Baek, Jong-Beom   +11 more
core   +1 more source

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