Abstract
Iron-nickel mixed oxide gels have been prepared by a hydroxide co-precipitation technique and their thermal transformation has been studied by thermal analyses, X-ray diffraction and infra-red spectroscopy. Differential thermal analysis (DTA) of the hydrated ferric oxide gel indicates the presence of three exothermic peaks along with a broad endotherm. Addition of nickel oxide decreases the intensities of the exotherms and the peaks are completely absent in the samples containing more than 10 mol % of NiO. On the other hand these samples show the presence of three endothermic peaks. Thermal analysis of the sample containing 50 mol % of NiO indicates the formation of a precursor at around 185° C which changes to nickel ferrite at around 275° C. This ferrite slowly crystallizes with a broad exotherm in the range 280 to 550° C.
Similar content being viewed by others
References
R. C. Mackenzie,Nature164 (1949) 244.
J. L. Kulp andA. F. Trites,Amer. Mineral.36 (1951) 23.
M. A. Gheith,Amer. J. Sci.250 (1952) 677.
S. J. Gregg andK. J. Hill,J. Chem. Soc. (London) (1953) 3945.
R. C. Mackenzie andR. Meldau,Mineral. Mag.32 (1959) 153.
L. G. Berg, K. P. Pribylov, V. P. Egunov andR. A. Abdurakhmanov,Russ. J. Inorg. Chem.14 (1969) 1211.
M. Sorrentino, L. Steinbrecher andF. Hazel,J. Colloid Interface Sci.31 (1959) 307.
E. P. Tsymbal, S. I. Smyshlyaer andL. M. Dvornikova,Russ. J. Inorg. Chem.15 (1970) 1653.
K. Kauffman andF. Hazel,J. Colloid Interface Sci.51 (1975) 422.
I. P. Saraswat, A. C. Vajpei, V. K. Garg, V. K. Sharma andN. Prakash,ibid.73 (1980) 373.
V. Caslaska, V. Frei andA. Blazer,Coll. Czech. Chem. Commun.27 (1962) 2168.
S. Rajendran, V. Sitakara Rao andH. S. Maiti,J. Mater. Sci.17 (1982) 2709.
W. M. Keely andH. W. Maynor,J. Chem. Eng. Data8 (1963) 297.
M. Le Van My,Bull. Soc. Chim. (France) (1964) 545.
E. Ya Rode,Z. Neorg. Khim1 (1956) 1430.
A. A. Van Der Giessen,Phillips Res. Rep. Suppl.12 (1968).
S. Rajendran, V. Sitakara Rao andH. S. Maiti,Trans. Ind. Ceram. Soc.41 (1982) 97.
Idem (to be published) inJ. Solid State Chem.
B. R. Arora, R. K. Banerjee, T. S. R. Prasad Rao, N. K. Mandal, N. B. Bhattacharyya andS. P. Sen,Thermochim. Acta6 (1973) 11.
B. R. Arora, R. K. Banerjee, T. S. R. Prasad Rao, N. K. Mandal, N. C. Ganguli andS. P. Sen,ibid.7 (1973) 25.
B. R. Arora, B. N. Singh andR. K. Banerjee,J. Therm. Anal.13 (1978) 449.
B. N. Singh, R. K. Banerjee andB. R. Arora,ibid.18 (1980) 5.
A. L. Stuijts, Proceedings of the 5th International Conference on the Science of Ceramics, April 20–23, Ronnely Brum., Sweden, 1969, edited by C. Brosset and E. Knoop (Swedish Institute for Silicate Research, 1970) p. 335.
F. Domka, Z. Dudzik andM. Gasiorek,React. Kinet. Catal. Lett.2 (1975) 171.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Sitakara Rao, V., Rajendran, S. & Maiti, H.S. Thermal transformations of iron(III)-nickel(II) mixed oxide gels. J Mater Sci 19, 3593–3601 (1984). https://doi.org/10.1007/BF02396931
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF02396931