Results 251 to 260 of about 25,595 (290)
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Temperature of the milling balls in shaker and planetary mills
Journal of Materials Science, 2006The temperature increase of the milling balls in two laboratory mills, frequently used for mechanical alloying and mechanochemical experiments, was studied using direct calorimetric measurements. The ball temper- ature remains below 100 C in a SPEX 8000 shaker mill and it is cooler when flat-ended rather than round-ended vial is used, although the ...
L. Takacs, J. S. McHenry
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Production of Foamed Concrete in a Planetary Ball Mill
Key Engineering Materials, 2020Nowadays, the type of foamed concrete performs a group of cemented composite materials that can compete with conventionally used autoclaved aerated concrete. Improving microstructure of the foamed concrete by inventive mixing technology allows to homogenizate the mix of foamed concrete.
Eva Namsone +3 more
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Experimental investigations and modelling of the ball motion in planetary ball mills
Powder Technology, 2011Abstract Planetary ball mills feature attractive properties, like the possibility of dry or wet operation, straightforward handling, cleanability and moderate costs. Consequently they are very well suited for lab scale process development in diverse industries, including pharmaceuticals and new materials. A number of questions still remain unanswered
S. Rosenkranz +2 more
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Simulation of ball motion and energy transfer in a planetary ball mill
Chinese Physics B, 2012A kinetic model is proposed for simulating the trajectory of a single milling ball in a planetary ball mill, and a model is also proposed for simulating the local energy transfer during the ball milling process under no-slip conditions. Based on the kinematics of ball motion, the collision frequency and power are described, and the normal impact forces
Sheng-Yong Lu +4 more
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Synthesis of Nanofertilizers by Planetary Ball Milling
2020Plant nutrients supplied to crops as fertilizers are essential for plant growth, metabolism and production. Inappropriate application of plant nutrients induces 40–70% loss of nutrients and causes contamination of land and water systems. Nano-fertilizers provide nutrients precisely to the plant’s requirement, and thus reduces the environmental loss of ...
Chwadaka Pohshna +2 more
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Scale-up method of planetary ball mill
Chemical Engineering Science, 2004The objective of this paper is to investigate the scale-up method of the planetary ball mill by the computational simulation based on Discrete Element Method. Firstly, the dry grinding of a gibbsite powder by using four different scales of planetary mill was developed to compare the grinding rate with the specific impact energy of balls calculated from
Hiroshi Mio, Junya Kano, Fumio Saito
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Synthesis of thermoelectric materials by mechanical alloying in planetary ball mills
Powder Technology, 1999Abstract We report on the influence of the planetary ball mill setting parameters on the evolution of alloy formation on the thermoelectric semiconductor systems, Si–Ge, Mg 2 Si, and Mg 2 (Si,Sn). From a macroscopical viewpoint, it turned out that the geometry of the mill and the ratio of the angular velocities of the planetary and the system wheel ...
Schilz, J. +3 more
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Planetary ball milling of MWCNTs reinforced NiAl composites
Materials Today: Proceedings, 2020Abstract Multi-walled carbon nanotubes (MWCNTs) are remarkable reinforcing material with magnificent mechanical features. The presences of sp2 C-C networks in their shells have been responsible for their wide-ranging mechanical abilities. MWCNT are generally known to agglomerate because of the existence of Van der Waals forces, which results in ...
Olusoji O. Ayodele +5 more
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Kinetics of Alumina Ultrafine Grinding in a Planetary Ball Mill
Materials and Manufacturing Processes, 1997Abstract A novel design of the planetary mill using two motor drives instead of the customary single drive is shown here. The grinding of alumina powder to micron sizes is achieved in a matter of 20 minutes. A factorial design of experiments on the mill delineated the key variables for achieving product quality.
Ludovic Milin, Raj K. Rajamani
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High Energy Planetary Ball Milling of SiC Powders
Key Engineering Materials, 2007The effects of high-energy ball milling on SiC powders were studied using a planetary apparatus. Conditions to obtain nanostructured SiC powders with an average crystallite size of 4 nm were determined and powders were characterized by XRD, SEM and TEM analyses. This process was applied to prepare fine powders leading to dense SiC ceramics by sintering
Yu Bai Pan +6 more
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