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Recrystallization of Isometric AgBr Microcrystals in a Gelatin Gel

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The investigation of kinetics of recrystallization (Ostwald ripening) of silver bromide microcrystals in gelatin was carried out. A theoretical model of the process of mass transfer between microcrystals during recrystallization was proposed and experimentally confirmed. Change of size of the crystals was monitored by a turbidimetric method. It was established that the rate of recrystallization is inversely proportional to distance between crystals in a gel and directly proportional to solubility of the dispersed phase. It was shown on model systems that the growth rate of large crystals is proportional to difference in size of large and fine crystals. It was also revealed that during recrystallization there is a change in growth rate of large crystals, which is caused most probably by change of habit of these crystals. The experimental approach allows study of the driving force and mechanism of recrystallization processes in more detail.

Document Type: Research Article

Publication date: 2001-05-01

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  • The Journal of Imaging Science and Technology (JIST) is dedicated to the advancement of imaging science knowledge, the practical applications of such knowledge, and how imaging science relates to other fields of study. The pages of this journal are open to reports of new theoretical or experimental results, and to comprehensive reviews. Only original manuscripts that have not been previously published, nor currently submitted for publication elsewhere, should be submitted.

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