Crystallization induction time
WebNov 24, 2024 · The observed induction time for seeded gypsum crystallization was investigated with respect to gypsum particle seed size and mass loading. The induction … WebThe most important thermodynamic property is the solubility, and the key kinetic properties are the metastable zone width (MSZW) and the induction time. For antisolvent crystallization the solubility must be determined across a range of solvent compositions, as the solvent composition is the parameter which is changed to generate supersaturation.
Crystallization induction time
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WebJan 3, 2024 · The temperature dependence of the crystallization induction time (τ 0 (T)) is a function of the thermodynamic activation barrier and the frequency of “attempted jumps” (1/τ α (T)) to overcome the barrier. Even … WebAug 28, 2013 · An approximation of the crystallization rate can be made by the overall crystallization rate , where (half the crystallization time) is the time at which approaches the value of 50%. This parameter is proportional to both the primary nucleation rate and the crystal/spherulite growth [].The induction time , that is, the time at which starts to …
WebJan 27, 2015 · The induction time distribution is explained by the stochastic nature of nucleation if the number of nuclei formed is approaching 1 per vial. Accurate … WebThe crystallization of gypsum was carried out under simulated conditions of phosphoric acid production by the dihydrate process. Calcium hydrogen phosphate and sulfuric acid were mixed with dilute phosphoric acid at 80 °C, and the turbidity of the reaction mixture was measured at different time periods to calculate the induction time of gypsum ...
WebBoth the true induction time and the crystallization rate curves were found to be similarly unsymmetrical as a function of temperature. Also, the temperature at the minimum … WebMay 3, 2013 · Smejkal et al. 6 found that the induction time for crystallization of lysozyme in a stirred crystallizer was substantially shorter compared to an experiment in a nonagitated microbatch.
WebApr 14, 2024 · Induction time of crystallization depends on the cooling rate. Investigations found that EVA will grow by the hang-wall model at the air-liquid contact line interface, or …
WebThe induction period for crystallization, defined as the time required to crystallize, was discussed during isothermal storage at -5 to -45°C for various vegetable oils; olive, … cannon planer board mastWebThe Avrami equation cannot account for a period where no crystallization occurs; therefore, induction time, t 0, denotes the initial time at which crystallization begins. An induction period in the early stage of crystallization is required for creation of nuclei and is estimated by calculating the first derivative d X / d t , because it should ... fiz new boyfriendWebA relation between induction time and metastable zone width in cooling crystallization has been developed based on the correlation between temperature and supersaturation with … cannon pillow companyWebIn this work, new Ge-containing Fe-based nanocrystalline alloys with the composition of Fe80.2Si3B12-xP2Nb2Cu0.8Gex (x = 0, 1, 2 at.%) were developed, and the effects of Ge content on the magnetic and crystallization processes of the alloys were investigated. The addition of Ge extends the annealing window of the present Fe-based alloys, which … fizmed lubawaWebJul 2, 2024 · Adding FHPKO to CBS increased the crystallization rate with a decrease in crystallization induction time but did not increase the heat resistance. In contrast, all KSF-CBS blends exhibited higher heat resistance than CBS and crystallized into β' form, a preferred polymorph for fats used in compound chocolate. cannon percale sheetsWebFeb 6, 2024 · In contrast, a low precipitant concentration results in long crystallization induction time, less crystal nucleation, and slow growth rate . In order to obtain perfect crystals, scientists have also explored various crystallization methods, such as the use of microgravity [ 16 ] or an electromagnetic field [ 17 , 18 ]. fizmerk india chemicalsWebApr 3, 2024 · Its crystallization induction time (λ) was long (~123 min), this being followed by a rapid crystallization rate (μ ~ 1.7%/min) before reaching an SFC plateau of 21% (Table 4). The sigmoidal curves indicated that no TAG crystallized until a sufficient number of stable nuclei were formed, followed by a period of rapid crystallization initiated ... cannon pits and fabrication