scholarly journals Kinetics and mechanism of mechanochemical synthesis of hafnium nitride ceramics in a planetary ball mill

2019 ◽  
Vol 45 (18) ◽  
pp. 24818-24826 ◽  
Author(s):  
A.A. Nepapushev ◽  
V.S. Buinevich ◽  
L.C. Gallington ◽  
J.M. Pauls ◽  
T. Orlova ◽  
...  
Keyword(s):  
Mechanochemical Synthesis ◽  
Ball Mill ◽  
Kinetics And Mechanism ◽  
Planetary Ball Mill ◽  
Hafnium Nitride ◽  
Nitride Ceramics

scholarly journals Efficient mechanochemical synthesis of regioselective persubstituted cyclodextrins

2016 ◽  
Vol 12 ◽  
pp. 2364-2371 ◽  
Author(s):  
Laszlo Jicsinszky ◽  
Marina Caporaso ◽  
Katia Martina ◽  
Emanuela Calcio Gaudino ◽  
Giancarlo Cravotto
Keyword(s):  
Mechanochemical Synthesis ◽  
Ball Mill ◽  
Solvent Free ◽  
Planetary Ball Mill ◽  
Aprotic Solvents ◽  
Isolation And Purification ◽  
Cyclodextrin Derivative ◽  
Complete Reaction ◽  
Solvent Free Conditions

A number of per-6-substituted cyclodextrin derivative syntheses have been effectively carried out in a planetary ball mill under solvent-free conditions. The preparation of Bridion® and important per-6-amino/thiocyclodextrin intermediates without polar aprotic solvents, a source of byproducts and persistent impurities, could be performed. Isolation and purification processes could also be simplified. Considerably lower alkylthiol/halide ratio were necessary to reach the complete reaction in comparison with thiourea or azide reactions. While the presented mechanochemical syntheses were carried out on the millimolar scale, they are easily scalable.

scholarly journals Mechanochemical synthesis of N-doped porous carbon at room temperature

Nanoscale ◽  
2019 ◽  
Vol 11 (11) ◽  
pp. 4712-4718 ◽  
Author(s):  
Mirian Elizabeth Casco ◽  
Sebastian Kirchhoff ◽  
Desirée Leistenschneider ◽  
Marcus Rauche ◽  
Eike Brunner ◽  
...  
Keyword(s):  
Mechanochemical Synthesis ◽  
Porous Carbon ◽  
Ball Mill ◽  
Room Temperature ◽  
Planetary Ball Mill ◽  
Porous Carbons ◽  
One Pot

One-pot mechanochemical synthesis of N-doped porous carbons at room temperature using a planetary ball mill.

scholarly journals Mechanochemical synthesis of some europium diketonates

2011 ◽  
Vol 9 (2) ◽  
pp. 290-299 ◽  
Author(s):  
Joana Zaharieva ◽  
Maria Milanova ◽  
Dimitar Todorovsky
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Ir Spectra ◽  
Excited States ◽  
Mechanochemical Synthesis ◽  
Ball Mill ◽  
Emission Spectra ◽  
Planetary Ball Mill ◽  
Fluorescence Properties ◽  
Partial Synthesis

AbstractResults on the influence of mechanoactivation (3–30 min) in a planetary ball mill on the composition, crystal structure, IR spectra and morphology of EuCl3·6H2O, dibenzoylmethane (HDBM) and mixtures of EuCl3·6H2O — HDBM and EuCl3·6H2O — HDBM — 1,10-phenathroline (phen) are presented. Mechanoactivation leads to a decrease of interplanar distances of the EuCl3·6H2O and HDBM and partial synthesis of Eu(DBM)3 and Eu(DBM)3·phen in the respective mixtures. The fluorescence properties of the products of activation (excitation and emission spectra, lifetime of the excited states) are similar to those of the complexes produced by the conventional “wet” methods, but the strongest excitation of the mechanochemically produced solid state samples is achieved at higher wavelength. Crystals of different forms (prismatic, needle-, long-length-leaf- and rod-like) are formed by mechanoactivation of the mentioned mixtures.

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.

Sign in / Sign up

Export Citation Format

Share Document