GROWTH MECHANISM OF KDP CRYSTALS FROM AQUEOUS SOLUTIONS
DOI:
https://doi.org/10.7251/COMEN1702190MAbstract
The results of the effect of the growth history on Potassium Dihydrogen Phosphate (KDP) crystals growth mechanism are presented in the paper. Crystals were grown in temperature range of from aqueous solutions, saturated at . Two types of the experiments were performed. In both types, after the nucleation at crystals were grown at the same temperature for about 1.5 hour and then dissolved at temperature for about 15 min. After refaceting, in the first type, the crystal growth started at , followed by the temperature increasing in steps of to . In the second type, after refaceting the crystal growth started at , followed by the temperature decreasing in steps of to . Obtained results indicate that KDP crystals growth mechanisms do not depend on growth history. They are discussed in accordance with the current theories.References
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A. A. Žekić, M. M. Mitrović, S. M. Elezović-Hadžić, D. A. Malivuk, Long-Time Growth Rate Changes of Sodium Chlorate, Potassium Dihydrogen Phosphate, and Rochelle Salt Crystals Independent of Growth Conditions, Ind. Eng. Chem. Res., Vol. 50−14 (2011) 8726−8733.
P. Bennema, Analysis of crystal growth models for slightly supersaturated solutions. J. Cryst. Growth, Vol. 1 (1967) 278−286.
P. Bennema, G. H. Gilmer, Crystal Growth: An Introduction; Hartman, P., Ed.; North-Holland: Amsterdam, (1973) 274.
E. G. Denk, G. D. Botsaris, Mechanism of potassium alum crystal growth from solution. J. Cryst. Growth, Vol. 6 (1970) 241−244.
A. A. Chernov, E. I. Givargizov, H. S. Bagdasarov, V. A. Kuznetsov, L. N. Demjancev, A. N. Lobachev, Crystal Growth (Modern Crystallography III); Springer Series in Solid State Sciences; Springer:Berlin, (1984) 36.
A. A. Chernov, L. N. Rashkovich, A. A. Mkrtchan, Solution growth kinetics and mechanism: Prismatic face of ADP. J. Cryst. Growth, Vol. 74 (1986) 101−112.
A. A. Chernov, The spiral growth of crystals. Sov. Phys. Uspekhi, Vol. 4 (1961) 116−148.
K. Sangwal, Growth kinetics and surface morphology of crystals grown from solutions: Recent observations and their interpretations. Prog. Cryst. Growth Charact. Mater., Vol. 36−3 (1998) 163−248.
P. Bennema, J. Boon, C. Van Leeuwen, G. H. Gilmer, Confrontation of the BCF Theory and Computer Simulation Experiments with Measured (R, σ) Curves. Krist. Tech., Vol. 8 (1973) 659−677.
J. W. Mullin, A. Amatavivadhama, M. Chakraborty, Crystal habit modification studies with ammonium and potassium dihydrogen phosphat, J. Appl. Chem., Vol. 20 (1970) 153−158.
M. M. Mitrović, R. I. Ristić, I. Ćirić, The influence of a magnetic field on the mosaic spread and growth rate of small Rochelle salt crystals, Appl. Phys. A 51, Vol. (1990) 374−378.
A.E.D.M. van der Heijden, J.P. van der Eerden, Growth rate dispersion: the role of lattice strain, J. Cryst.Growth, Vol. 118 (1992) 14−26.
M. M. Mitrović, A. A. Žekić, B. M. Misailović, B.Z. Radiša, Effect of Dissolution and Refaceting on Growth Rate Dispersion of Sodium Chlorate and Potassium Dihydrogen Phosphate Crystals, Ind. Eng. Chem. Res., Vol. 53−50 (2014) 19643−19648.
T. D. Dincer, M. I.Ogden, G. M. Parkinson, Investigation of growth rate dispersion in lactose crystallisation by AFM, J. Cryst. Growth, Vol. 402 (2014) 215−221.
P. Pantaraks, A. E. Flood, Effect of Growth Rate History on Current Crystal Growth: A Second Look at Surface Effects on Crystal Growth Rates. Cryst. Growth Des., Vol. 5−1 (2005) 365−371.
B. Z. Radiša, M. M. Mitrović, B. M. Misailović, A. A. Žekić, Investigation of Growth Mechanisms of Sodium Chlorate Crystals from Aqueous Solutions, Ind. Eng. Chem. Res., Vol. 55−39 (2016) 10436–10444.
A. A. Žekić, M. M. Mitrović, S. M. Elezović-Hadžić, D. A. Malivuk, Long-Time Growth Rate Changes of Sodium Chlorate, Potassium Dihydrogen Phosphate, and Rochelle Salt Crystals Independent of Growth Conditions, Ind. Eng. Chem. Res., Vol. 50−14 (2011) 8726−8733.
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2018-02-14
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