Abstract
Dissolution of zinc and nickel ferrites were previously found2,3 to conform to the equations:
x-solubility (%),t=time (min),s 0=initial specific surface (m 2·g−1),k-rate constant independent of specific surface,K=apparent rate constant dependent on specific surface (min−1).
The aim of this work was to check the applicability of these equations to the dissolution of nickel—zinc ferrites. The experimental results obtained for 3 mixed ferrites (Ni0.3Zn0.7Fe2O4, Ni0.5Zn0.5Fe2O4, Ni0.7Zn0.3Fe2O4) revealed that kinetics of their dissolution in HCl, HNO3 and their mixtures also conform to the equations stated above.
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Literatur
Wł. Wolski undI. Kozłowska, J. Japan Soc. Powder and Powder Metal.18, 8 (1970).
I. Okońska-Kozłowska, Mh. Chem.103, 1585 (1972).
F. J. Verwey, P. W. Haaymann undF. C. Romeijn, J. Chem. Phys.15, 182 (1947).
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I. Okońska-Kozlowska, Teil der Dissertation, Poznań 1969.
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Okońska-Kozlowska, I. Löslichkeit von Nickel-Zink-Ferriten in Säuren. Monatshefte für Chemie 104, 1040–1044 (1973). https://doi.org/10.1007/BF00903920
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DOI: https://doi.org/10.1007/BF00903920