Kinetic model for binary homogeneous nucleation in the H2O–H2SO4 system: Comparison with experiments and classical theory of nucleation

2005 ◽  
Vol 123 (24) ◽  
pp. 244508 ◽  
Author(s):  
A. Sorokin ◽  
X. Vancassel ◽  
P. Mirabel
Keyword(s):  
Kinetic Model ◽  
Classical Theory ◽  
Homogeneous Nucleation ◽  
Comparison With Experiments

Transient Nucleation in Devitrification

1993 ◽  
Vol 321 ◽  
Author(s):  
A. L. Greer
Keyword(s):  
Classical Theory ◽  
Heterogeneous Nucleation ◽  
Glass Formation ◽  
Homogeneous Nucleation ◽  
Amorphous Solids ◽  
Crystal Nucleation ◽  
Transient Effects ◽  
Interphase Interface ◽  
Transient Nucleation ◽  
Important Test

ABSTRACTA review is given of transient crystal nucleation in glassy or amorphous solids. The types of behaviour are surveyed. It is shown that the kinetics can be quantitatively modelled and that the matching of experiment and theory provides an important test of the classical theory. Examples are considered of homogeneous nucleation (affecting glass formation), heterogeneous nucleation, and nucleation at an interphase interface. While the emphasis is on transient effects of the kind implicit in the classical theory, it is shown that transients can arise for other reasons as well, thus potentially complicating the interpretation of experiments.

Simple correction to the classical theory of homogeneous nucleation

2005 ◽  
Vol 122 (10) ◽  
pp. 104511 ◽  
Author(s):  
Alexey B. Nadykto ◽  
Fangqun Yu
Keyword(s):  
Classical Theory ◽  
Homogeneous Nucleation

Condensation of supersaturated vapours. Homogeneous nucleation of naphthalene and phthalic anhydride

1985 ◽  
Vol 50 (6) ◽  
pp. 1349-1358 ◽  
Author(s):  
Jiří Smolík ◽  
Jaroslav Vítovec
Keyword(s):  
Surface Tension ◽  
Thermal Diffusion ◽  
Classical Theory ◽  
Phthalic Anhydride ◽  
Homogeneous Nucleation ◽  
Corresponding States ◽  
Experimental Results ◽  
Critical Supersaturation ◽  
Fluid Behaviour ◽  
Good Agreement

The critical supersaturation required for the homogeneous nucleation of naphthalene and phthalic anhydride from their vapours has been measured using upward thermal diffusion cloud chamber. The results obtained are compared with the predictions of the classical theory of homogeneous nucleation (Volmer-Becker-Doring-Zeldovich) and the corresponding states correlation of homogeneous nucleation. The classical theory is found to be in excellent agreement with the experimental results on naphthalene but overpredicts the critical supersaturation of phthalic anhydride vapours by about 30%. In order to fit the experiment and theory, the new values of surface tension of phthalic anhydride were recalculated from the theory. Critical supersaturation of naphthalene plotted versus temperature reveals the same regular departure from single fluid behaviour as found for alkylbenzenes. The experimental results on phthalic anhydride were found to be in very good agreement with the corresponding states correlation.

Estimation of homogeneous nucleation flux via a kinetic model

1991 ◽  
Vol 94 (12) ◽  
pp. 8302-8309 ◽  
Author(s):  
C. F. Wilcox ◽  
S. H. Bauer
Keyword(s):  
Kinetic Model ◽  
Homogeneous Nucleation

scholarly journals Homogeneous Nucleation of Hydroxyapatite, Ca5OH(PO4)3, at 37 °C

Crystals ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 695 ◽  
Author(s):  
Hans Erik Lundager Madsen
Keyword(s):  
Free Energy ◽  
Light Scattering ◽  
Calcium Phosphate ◽  
Surface Free Energy ◽  
Classical Theory ◽  
Homogeneous Nucleation ◽  
Crystal Surface ◽  
Small Particles ◽  
Large Particles

Precipitation of the calcium phosphate hydroxyapatite, Ca5OH(PO4)3, is studied by simple mixing of reagent solutions and measurement of light scattering (turbidimetry) at six different wavelengths from 300 to 800 nm. Measured turbidities are analyzed using Mie’s theory of light scattering from small particles. Results are interpreted in terms of classical theory of homogeneous nucleation, and from this the surface free energy of crystals is determined. The low value thus found is explained as the effect of protonation of the strongly basic anions hydroxide and phosphate at the crystal surface. Relatively large particles registered by turbidimetry are shown to be not monocrystals, but aggregates of nanocrystals.

Homogeneous Vapor Nucleation and Superheat Limits of Liquid Mixtures

1979 ◽  
Vol 101 (4) ◽  
pp. 617-621 ◽  
Author(s):  
E. L. Pinnes ◽  
W. K. Mueller
Keyword(s):  
Equation Of State ◽  
General Theory ◽  
Vapor Phase ◽  
Classical Theory ◽  
Homogeneous Nucleation ◽  
Liquid Mixtures ◽  
The Other ◽  
Hydrocarbon Mixtures ◽  
Vapor Nucleation ◽  
Component Case

Two features distinguish vapor nucleation in multicomponent liquids from the single component case. Both result from the unequal volatilities of the species. One is that the vapor phase may contain several components; the other is that nucleus formation alters the composition of the nearby liquid. These two features are incorporated into the classical theory of homogeneous nucleation to yield a general theory applicable to multicomponent liquids. The theory is applied to binary hydrocarbon mixtures by using an equation of state extrapolated into the metastable region. Superheat limits thus calculated are compared with published experimental results.

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