Abstract
The selective etching and dissolution of BaF2 crystals have been studied in aqueous solutions of inorganic salts, inorganic and organic acids. The effect of additives on selective etch rates is demonstrated. It is observed that chemical exchange reactions determine the selective etching and dissolution of BaF2 crystals. The form of etch pits corresponds to the real dissolution form of BaF2 crystals (rhombododecahedron). It has been established that the process of dissolution in HNO3 and HCl is diffusion controlled. The activation energy is independent of acid concentration and has the same value for both HNO3 and HCl. The pre-exponential factor is concentration dependent. An empirical equation for dissolution kinetics has been obtained.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
T. S. Liu and C. H. Li, J. Appl. Phys. 35 (1964) 3325.
A. R. Patel and R. P. Singh, Brit. J. Appl. Phys. D2 (1969) 319.
Idem, J. Crystal Growth 2 (1968) 373.
A. I. Brodski Fiz. Khim. 2 (1948) 938.
“Spravochnik khimika” (Khimiya, Moscow, Leningrad, 1964) p. 22.
J. J. Gilman, G. W. Jonston and G. W. Sears, J. Appl. Phys. 29 (1958) 747.
A. A. Urusovskaya, Kristallogr. 8 (1963) 75.
A. E. Smirnov, R. V. Galiulin and Yu. A. Haritonov, Kristallogr. 23 (1978) 434.
K. J. Laider, “Chemical Kinetics” (McGraw-Hill, New York, 1950).
“Kratkaya Khimicheskaya Entsiklopediya”, Vol. 5, (Sovetskaya Entsiklopediya, Moscow, 1967).
K. Sangwal and S. K. Arora, J. Mater. Sci. 13 (1978) 1977.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Smirnov, A.E., Urusovskaya, A.A. Selective etching and dissolution of BaF2 crystals. J Mater Sci 15, 1183–1188 (1980). https://doi.org/10.1007/BF00551807
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00551807