Evolution of the diffusion field during crystal growth in gel studied by speckle interferometry

Krasiński, Mariusz J.; Piano, E.; Dall'Aglio, Gian Antonio

doi:10.1016/s0254-0584(02)00542-4

Cited by 3 publications

(7 citation statements)

References 18 publications

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“…This value obtained from in situ topography of hillocks is even smaller than that we have recently obtained indirectly from concentration distribution in gel [4]. The number of experiments for pyramidal face of KDP was limited.…”

Section: Resultscontrasting

confidence: 58%

“…Because interface supersaturation in gels is always lower than that in the bulk [3,4], to some extends the lower value for kinetic coefficient β may be understood. However, our earlier measurements of concentration distribution in gel near the growing crystal showed that usually σ interface /σ bulk > 0.15 for low supersaturations [4]. Thus the lower value of interface supersaturation may not be the only reason of the lower value for kinetic coefficient β obtained in our experiments.…”

Section: Resultsmentioning

confidence: 99%

“…and depends not only on β but also on hillock slope p. Recently, we have measured linear kinetic coefficient B for potassium dihydrogen phosphate (KDP) growing in gel from volume concentration distribution by interferometric methods [4]. The determined value was about three times smaller than that for solution growth.…”

Section: Introductionmentioning

confidence: 97%

“…Perfect removal of the gel from the surface of crystals drawn from gel is not an easy task. Another important problem is the fact that crystals in gel usually do not grow with a constant velocity [3,4]. The ex situ observation of surfaces of crystals removed from gel provides information only about the last phases of growth.…”

Section: Introductionmentioning

confidence: 99%

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In situ interferometric investigation of hillock morphology of the {100} and {101} faces of KDP growing in TMS gels

Krasiński

2005

Cryst. Res. Technol.

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The results of an in situ interferometric study of the surface morphology of {100} and {101} faces of potassium dihydrogen phosphate (KDP) crystals growing in the tetramethoxysilane gel are described and discussed. It was observed that: (a) in the case of crystal growth in gel both slopes of hillocks and surface kinetic coefficient are smaller than in solution growth, (b) for low supersaturations face growth rate linearly depends on bulk supersaturation and the structure of growth centers depends on the supersaturation and growth rate, and (c) for high supersaturations polyhedral instability appears. Supersaturation threshold for transition to polyhedral instability was estimated and formation of gel inclusions is discussed.

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Section: Resultscontrasting

confidence: 58%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

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In situ interferometric investigation of hillock morphology of the {100} and {101} faces of KDP growing in TMS gels

Krasiński

2005

Cryst. Res. Technol.

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“…Inhomogeneity in supersaturation at constant temperature may be caused by changes in hydrodynamic condition in the case of fast stirring of solution or changes in diffusion process in the case of weak stirring. Such an inhomogeneity in supersaturation occurring for constant temperature may be visible very well as interference bands in solution, which represent isoconcentration lines [4,6].…”

Section: Introductionmentioning

confidence: 99%

Effect of supersaturation on evolution of crystal faces—theoretical analysis

Prywer

2006

Journal of Crystal Growth

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Interferometric measurement of a diffusion coefficient: comparison of two methods and uncertainty analysis

Riquelme

Lira

Pérez-López

et al. 2007

J. Phys. D: Appl. Phys.

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Two methods to measure the diffusion coefficient of a species in a liquid by optical interferometry were compared. The methods were tested on a 1.75 M NaCl aqueous solution diffusing into water at 26 °C. Results were D = 1.587 × 10−9 m2 s−1 with the first method and D = 1.602 × 10−9 m2 s−1 with the second method. Monte Carlo simulation was used to assess the possible dispersion of these results. The standard uncertainties were found to be of the order of 0.05 × 10−9 m2 s−1 with both methods. We found that the value of the diffusion coefficient obtained by either method is very sensitive to the magnification of the optical system, and that if diffusion is slow the measurement of time does not need to be very accurate.

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Evolution of the diffusion field during crystal growth in gel studied by speckle interferometry

Cited by 3 publications

References 18 publications

In situ interferometric investigation of hillock morphology of the {100} and {101} faces of KDP growing in TMS gels

In situ interferometric investigation of hillock morphology of the {100} and {101} faces of KDP growing in TMS gels

Effect of supersaturation on evolution of crystal faces—theoretical analysis

Interferometric measurement of a diffusion coefficient: comparison of two methods and uncertainty analysis

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