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for the SHS reactions. Based on combustion wave kinetics, the activation energies of Ea=97.1 and 101.1 kJ/mol are deduced for the metallothermic SHS reactions. XRD analyses confirm in situ formation... alloying [9], pulsed current sintering [10,11], and thermal explosion [6,7,12]. Alternatively, combustion synthesis in the mode of self-propagating high-temperature synthesis (SHS) has the merits......
of barium hexaferrite doped with La3+ were studied by chemical phase analysis, X-ray diffraction and infrared spectrometry analysis. The experimental results show that phase transformation reactions......
system, kinetics has been further studied in this work. It is confirmed that the product is TbFe2 by means of XRD. The contracting core model is applied. The reactions are found to be diffusion......
+ and Sm3+ with HEH/EHP-kerosene in a hollow fiber membrane extractor were studied. The results show that the extraction reactions in the hollow fiber membrane extractor are the same as those in the liquid......
of the dolomite calcination and the magnesium production by reduction, and relations of the chemical reactions involving SiO2 were obtained. The results show that the effect of SiO2 is the formation of 2CaO·SiO2 in the final calcined dolomite, which reduce the CaO. The reactions involving SiO2 in the calcination process are complex and several intermediate product, such as 2MgO·SiO2, 2CaO·SiO2......
in a hydrogen atmosphere furnace at 950 ℃ for 1 h, the main phases after heating are Cu and MoSi2, and there are no reactions between MoSi2 and Cu. The results of DSC analysis show that there are only decomposition reactions of Cu2Cl(OH)3 and Cu2O in the calcined sample below 1 000 ℃. MoSi2/Cu composite powder has good thermal stability. Key words: chemical coating; MoSi2/Cu; thermal stability; composite......
of cyanidation leaching, arsenopyrite is very stable and does not participate in any side reactions, conversely, realgar participates in the side reactions with cyanide and alkali. The efficiency......
) and electron spectroscopy (EDS), respectively. The electrolytic efficiency was calculated based on experimental data. The electrode reactions during electrolysis were discussed by analyzing intermediate...%. The electrode reactions in the stable electrolysis region is irreversible and the concentration polarization process of cathode is an important factor of restricting electrolysis rate Key words: calcium......
reactions and their Gibbs free energy. The proper quantity oxygen and SO32- reduce decomposition of S2O32- and react with sulfur derived from the decomposition of SX2-. So, SO32- ions have action... and 1-6 in Fig.1). The following reactions happened: 2S2O32-+O2=2S2O42- ?GΘ298=-155.6 kJ/mol ......
., Kunming 650031, China; 3. Kunming Yeyan New-Material Co., Ltd., Kunming 650031, China) Abstract: Based on the thermodynamic data for the related pure substances, fifteen possible chemical reactions in the SiCl4 hydrogenation system of Siemens process that is one of the main process for the polysilicon production were studied. The curves of the fifteen chemical reactions in the system versus......
