Silicon Powder Properties Produced in a Planetary Ball Mill as a Function of Grinding Time, Grinding Bead Size and Rotational Speed

Silicon ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 2413-2423 ◽  
Author(s):  
Benedicte Eikeland Nilssen ◽  
Rolf Arne Kleiv
Keyword(s):  
Rotational Speed ◽  
Ball Mill ◽  
Silicon Powder ◽  
Planetary Ball Mill ◽  
Bead Size ◽  
Powder Properties ◽  
Grinding Time

Synthesis of Nanocrystalline TiC1-xNx by High Energy Milling

2011 ◽  
Vol 194-196 ◽  
pp. 458-461
Author(s):  
Jian Feng Zhu ◽  
Lan Ye ◽  
Hai Tong ◽  
Fen Wang
Keyword(s):  
Phase Transformation ◽  
Carbon Black ◽  
Formation Mechanism ◽  
Rotational Speed ◽  
Ball Mill ◽  
High Energy ◽  
Planetary Ball Mill ◽  
Powder Morphology ◽  
High Energy Milling ◽  
Morphology Characteristics

The nanocrystalline TiC1-xNx powders were synthesized by high energy milling from the mixture of Ti and carbon black in nitrogen milling atmosphere. The phase transformation and powder morphology characteristics were studied by using XRD and SEM. The results show that nanocrystalline TiC1-xNx powders were fabricated successfully by milling for 24 h at a rotational speed of 450 rpm in planetary ball-mill. The formation mechanism was mechanically induced self-propagating reactive synthesis (MSR). According to changing the mole ratio of C to Ti, serial TiC1-xNx powders can be produced, including TiC7N3, TiC5N5, and TiC3N7.

The Working Principle of Dual-Planetary Ball Mill and the Establishment of the Discrete Element Mode

2014 ◽  
Vol 685 ◽  
pp. 195-198
Author(s):  
Jie Yang ◽  
Jing Tao Wei
Keyword(s):  
Contact Stress ◽  
Rotational Speed ◽  
Ball Mill ◽  
Discrete Element ◽  
Average Stress ◽  
Planetary Ball Mill ◽  
Filling Rate ◽  
Simulation Research ◽  
Working Principle

This paper describes the mechanism of a small dual-planetary ball mill which is used in the laboratory, and using the discrete element software PFC3D to establish corresponding model of the milling tank in dual-planetary ball mill and the ball medium in tank. The big wheel under different rotational speed affects the average contact stress and the different filling rate of 8 mm ball medium affects the average stress, which are applied to simulation research, and we draw the corresponding conclusion.

Study on Preparation of Mullite Powder Using Fly Ash by Mechanochemical Method

2013 ◽  
Vol 318 ◽  
pp. 326-330
Author(s):  
Lei Zhang ◽  
Qun Yu Chen ◽  
Ding Gao
Keyword(s):  
Fly Ash ◽  
Ball Mill ◽  
Structural Changes ◽  
Planetary Ball Mill ◽  
Mechanochemical Method ◽  
Signal Phase ◽  
Direct Formation ◽  
Ft Ir ◽  
Mullite Powder ◽  
Grinding Time

This paper studies the structural changes of the mixture of fly ash and A12O3 grinded by planetary ball mill . By investigating the structure of the ground product by SEM, XRD and FT-IR, the mechanism of mullite formation is discussed. The crystal structure of the mixture was destroyed by the grinding of planetary ball mill, and with the grinding time increases, the specific surface area of the mixture increases as well. And this leads to the decrease of bond energy, the increase of the internal energy and the decrease of the activation energy. After this process,uniform mixture and direct formation of signal phase mullite can be obtained from the mixture grinded for 30 hours and calcined at 1150°C for 2 hours and the temperature for mixture ungrinded needs to reach 1450°C.

Fast, solvent-free and highly enantioselective fluorination of β-keto esters catalyzed by chiral copper complexes in a ball mill

2017 ◽  
Vol 19 (7) ◽  
pp. 1674-1677 ◽  
Author(s):  
Yifeng Wang ◽  
Haojiang Wang ◽  
Yidong Jiang ◽  
Cheng Zhang ◽  
Juanjuan Shao ◽  
...  
Keyword(s):  
Ball Mill ◽  
Copper Complexes ◽  
Solvent Free ◽  
Planetary Ball Mill ◽  
Keto Esters ◽  
Solvent Free Conditions

A fast and highly enantioselective fluorination of β-keto esters catalyzed by diphenylamine linked bis(oxazoline)-Cu(OTf)2 complexes under solvent-free conditions has been developed using a planetary ball mill.

scholarly journals Production of Ultrafine Particles by Continuous Planetary Ball Mill.

1991 ◽  
Vol 38 (2) ◽  
pp. 66-69
Author(s):  
Kantaro KANEKO ◽  
Mutsuhiro KAWASHIMA
Keyword(s):  
Ball Mill ◽  
Ultrafine Particles ◽  
Planetary Ball Mill

scholarly journals Analysis of early-stage sintering mechanisms of mechanically activated BaTiO3

2006 ◽  
Vol 38 (3) ◽  
pp. 239-244 ◽  
Author(s):  
M.V. Nikolic ◽  
V.P. Pavlovic ◽  
V.B. Pavlovic ◽  
M.M. Ristic
Keyword(s):  
Barium Titanate ◽  
Temperature Interval ◽  
Ball Mill ◽  
Early Stage ◽  
Planetary Ball Mill ◽  
Heating Rates ◽  
Barium Titanate Powder ◽  
Powder Samples ◽  
Sintering Mechanisms

Barium-titanate powder was mechanically activated in a planetary-ball mill for 60 and 120 minutes. Non-isothermal sintering of non-activated and activated powder samples was investigated using a dilatometer in the temperature interval from room to 1380oC with three different heating rates (10, 20 and 30oC/min). Early-stage sintering mechanisms for all three types of samples were analyzed, showing significant differences between the non-activated and mechanically activated samples.

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