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for 15 min (Fig. 3(a)), three endothermic peaks are observed at 140, 310 and 661 °C, which are attributed to the dehydration, NiCO3 decomposition (removal of CO2) and the melting of Al. Two exothermic... to the dehydration and NiCO3 decomposition (removal of CO2). The second stage is between 300 and 900 °C, which shows no significant mass change. Finally, the third stage (~20% mass gain) occurred......
water in hydrous ferrous sulfate must be completely removed. Dehydration of hydrous ferrous sulfate utilizing microwave heating is a promising choice. Microwaves are a form of electromagnetic energy...°C and stopped at 150°C, accompanied with 33.37% mass loss; this loss wasattributed to the dehydration of ferrous sulfate. Stage II began at 230°C and stopped at 300°C, accompanied with 8.07% mass loss......
and 297.02 kJ/mol. WANG et al [17] conjectured that glucopyranose produced a ring-opening chain firstly by cleavage of C(1)-O bond and then cyclized to form an intermediate by dehydration of hydroxyl groups on C(2) and C(5), afterwards 5-HMF was generated through two hydroxyl dehydration reaction. While some other scholars [18] believed that 5-HMF is formed through the way that the open-loop glucose chain......
watering-molecules and hydroxyls[7]. So the dehydration process of gels is very important. Absolute alcohol has good dehydration character. It can replace moisture that is absorbed on the surface... and thermal and electric conductivities of high dense Mo/Cu composites [J]. Trans Nonferrous Met Soc China, 2005, 15(3): 110-114. [5] JONESSL N M. Dehydration of hydrous zirconia with methanol [J]. J......
℃, 226-273℃, 430℃, respectively, which represent the loss of absorbed water, dehydration reactions of LiOH·H2O and Ni0.8Co0.1- Mn0.1(OH)2, respectively. With the increase of temperature, the dehydration products, Ni0.8Co0.1Mn0.1O2 and Li2O, react slowly to LiNi0.8Co0.1Mn0.1O2. Owing to the fact that the reaction is composed by several sections including dehydration process as shown above, two- section......
part of the curve presents no endothermic peak or exothermic peak. It can be considered that the SnO2 has a thorough dehydration. Fig.2 DSC diagram of AgSnO2 powders 3.5 XRD analysis Fig.3 shows... process, Ag(NH3)2+ can be reduced by SO32- effectively and Sn(OH)4 precipitate can be dehydrated to form SnO2 crystal. Owing to the reduction of Ag(NH3)2+, precipitation of Sn(OH)4 and dehydration of Sn......
if C3A contains 15% CaCO3. At each hydration age, distinct endothermic peaks appear between 140 and 165 ℃, which result from the dehydration of calcium carboaluminate hydrate, while the endothermic peaks between 258 and 267 ℃ are the results of the dehydration of C3AH6. Therefore, it is confirmed from the DSC analysis that the hydration products of C3A containing CaCO3 react with CaCO3, which......
-one), 1×105 MG-63 cells were seeded to every sample. Six hours later, samples were collected for cells fixation. After all specimens were pre-fixed with 3% glutaraldehyde for 30 min, the dehydration process was carried out by combining a gradient ethanol/ddH2O dehydration and a gradient hexamethyldisilazane/ethanol dehydration. The morphologies of cells were observed by the environment scanning......
(Al)=2.0, 2.5 and 3.0 3.2 DSC-TG analysis Figure 3 shows the DSC-TG curves of sample of n(P)/n(Al)=2.5. The curves reveal a two-stage dehydration process. The dehydration of the first stage... in the sample. Simultaneously, formation of new phases also occurred in the course of dehydration. The process is expressed as follows: Fig. 3 DSC-TG curves of sample at n(P)/n(Al)=2.5 3.3 Morphology of sample......
is caused by the dehydration of the sample and the evaporation of remained ethanol. The DTA curve presents a sharp endothermic peak around 250 °C, but little mass loss can be observed on the TGA curve... in Fig.6. An endothermic peak occurs on the DTA curve around 90 °C and a corresponding mass loss is observed on the TGA curve, which is due to the dehydration of physically absorbed water in the sample......