نتایج جستجو برای: mechanochemical reaction
تعداد نتایج: 414432 فیلتر نتایج به سال:
In recent years, much research has been performed in the field of nanomaterials synthesis using mechanochemical process. In this research, TixAly/Al2O3 ceramic matrix nanocomposite was produced by the mechanochemical method. Aluminum and inexpensive titanium oxide powders were used as raw materials, and milling was performed under N2 atmosphere. The results showed that reduction of TiO2 by Al i...
In this study, we aim to prepare a highly selective fluorine adsorbent by mechanochemical treatment from two types of titanium oxides, rutile and anatase. Fluorine adsorption the products anatase increased for 60 min regardless ball diameter used in treatment, were 1.5 2.0 times higher than those raw materials, respectively. With decreasing pH 2-3, on maximum at 2-3. The can remove fluoride ion...
Edge-styrene graphitic nanoplatelets (StGnPs) were prepared by the in-situ mechanochemical reaction between graphite and styrene without additional chemical (e.g. functionalization). The resultant StGnPs exhibited excellent properties including good dispersibility in organic solvents, to use an efficient reinforcing additive for polystyrene (PS) that is one of most widely used plastics. StGnP/P...
Using atomic force microcopy, mechanochemical removal behaviors of GaAs surface slid by Al2O3, SiO2, and CeO2 micro-spherical tips were investigated in ambient environment. High-resolution transmission electron microscope characterization demonstrates that defect-free material was achieved on under the contact pressures much below yield limit plastic deformation, which can be ascribed to water-...
Fe-substituted MWW-type zeolites ([Fe]-MWWMC) were successfully synthesized by a mechanochemically assisted hydrothermal synthesis, termed the mechanochemical method, for first time and compared with samples prepared conventional method ([Fe]-MWWHT). A reaction between SiO2 ?-FeOOH, which is step of yielded an amorphous Si–Fe composite oxide that consisted tetrahedrally coordinated Fe species i...
The mechanism for the mechanochemical synthesis of (C(NH2 )3 PbI5 3 and )4 PbI6 4 their conversion into each other is presented. We investigated at different frequencies energies using in situ powder X-ray diffraction. By splitting reaction single parts we could prove that formation simply dependent on energy mixing speed. nucleation instead slightly negative but speed, while its growth mostly ...
The influence of magnesium content on the mechanosynthesis of ZrB2–SiC–ZrC composite in Mg/ZrSiO4/B2O3/C mixture was investigated. Thermodynamic evaluations revealed that the amount of Mg played a main role, thereby; the overall reaction enthalpy and adiabatic temperature (Tad) changed by variation of magnesium content. According to differential thermal analysis (DTA) results, after 45min milli...
Core/shell-like nanostructured xLi2MnO3·(1-x)LiMO2 (M = Ni, Co, Mn) composite cathode materials are successfully synthesized through a simple solid-state reaction using a mechanochemical ball-milling process. The LiMO2 core is designed to have a high-content of Ni, which increases the specific capacity. The detrimental surface effects arising from the high Ni-content are countered by the Li2MnO...
Abstract: Nano- size alumina particles have been synthesized by mechanical activation of a dry powder mixture of AlCl3 and CaO. Mechanical milling of the above raw materials with the conditions adopted in this study resulted in the formation of a mixture consisting of crystalline CaO and amorphous aluminum chlorides phases. There was no sign of chemical reaction occurring during milling stag...
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