A set of laser apparatus was used to explore the induction period and the primary nucleation of lithium carbonate.Results show that the induction period increases with the decrease of supersaturation,temperature and s...A set of laser apparatus was used to explore the induction period and the primary nucleation of lithium carbonate.Results show that the induction period increases with the decrease of supersaturation,temperature and stirring speed.Through the classical theory of primary nucleation,many important properties involved in primary nucleation under different conditions were obtained quantitatively,including the interfacial tension between solid and liquid,contact angle,critical nucleus size,critical nuleation free energy etc.展开更多
The solubility, metastable zone width, and induction time of analgin for unseeded batch cooling crystallization in ethanol–aqueous system were experimentally determined. The solubility data could be well described by...The solubility, metastable zone width, and induction time of analgin for unseeded batch cooling crystallization in ethanol–aqueous system were experimentally determined. The solubility data could be well described by the van't Hoff equation model. The metastable zone width at various cooling rates was measured, and some parameters of nucleation kinetic were calculated using the Ny'vlt theory. Furthermore, the induction period of various temperatures and supersaturation ratios was also measured. According to classical nucleation theory, some nucleation parameters and interfacial energy was calculated through the induction time(t_(ind)) data. Homogeneous nucleation tended to occur when the supersaturation is high, whereas heterogeneous nucleation was more likely to occur when the supersaturation is low.展开更多
基金financially supported by Shanghai Leading Academic Discipline Project(Project No.B506).
文摘A set of laser apparatus was used to explore the induction period and the primary nucleation of lithium carbonate.Results show that the induction period increases with the decrease of supersaturation,temperature and stirring speed.Through the classical theory of primary nucleation,many important properties involved in primary nucleation under different conditions were obtained quantitatively,including the interfacial tension between solid and liquid,contact angle,critical nucleus size,critical nuleation free energy etc.
基金Supported by the National Natural Science Foundation of China(21206109)China Ministry of Science and Major National Scientific Instrument Development Project(21527812)
文摘The solubility, metastable zone width, and induction time of analgin for unseeded batch cooling crystallization in ethanol–aqueous system were experimentally determined. The solubility data could be well described by the van't Hoff equation model. The metastable zone width at various cooling rates was measured, and some parameters of nucleation kinetic were calculated using the Ny'vlt theory. Furthermore, the induction period of various temperatures and supersaturation ratios was also measured. According to classical nucleation theory, some nucleation parameters and interfacial energy was calculated through the induction time(t_(ind)) data. Homogeneous nucleation tended to occur when the supersaturation is high, whereas heterogeneous nucleation was more likely to occur when the supersaturation is low.
