Abstract
The effect of ultrasonic waves on the particle size and distribution of precipitated crystals from a slowly cooled supersaturated solution of ammonium aluminium sulphate hydrate was investigated. It was found that ultrasonic irradiation greatly promoted the homogeneity in particle sizes of the crystals precipitated. Average particle sizes of both the mechanical stirred and the ultrasonically treated samples did not change much if the initial solute concentration was beyond the saturation solubility of the solution. The higher acoustic intensity of the higher frequency ultrasonic transducer resulted in a larger average particle size in the recrystallization process.
Similar content being viewed by others
References
H. H. Willard,Analyt. Chem. 22 (1950) 1372.
E. Mori andK. Ito,Proc. Ultrasonic Int. 72 (1972) pp. 338–41.
Y. Ozaki, in “Ceramic Processing: Powder Preparation and Forming” (Yogyokyokai, Japan, 1984) p. 17.
T. Nakai, in “Chemical Engineering, Series 9, Crystal Analytic Engineering” (Baifukan, Japan, 1986) p. 6.
D. A. Porter andK. E. Easterling, in “Phase Transformation in Metals and Alloys” (van Nostrand Reinhold, 1981) p. 189.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Enomoto, N., Sung, T.H., Nakagawa, Z.E. et al. Effect of ultrasonic waves on crystallization from a supersaturated solution of alum. J Mater Sci 27, 5239–5243 (1992). https://doi.org/10.1007/PL00020245
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/PL00020245