ISSN:
1572-8943
Keywords:
co-precipitation technique
;
Cu-Mg-Zn ferrites
;
decomposition termination temperature
;
spinel phase
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract Homogeneous solid solution oxalates of Fe2+, Cu2+, Mg2+ and Zn2+ metals were prepared by co-precipitation from respective metal acetate solutions with oxalic acid solution. The thermogravimetric (TG) analysis of co-precipitated oxalate complexes with general formula MgxCu(0.50-x)Zn0.50Fe2(C2O4)3·nH2O (x=0.00, 0.05, 0.10, 0.15, 0.20, 0.25, 0.30, 0.35, 0.40, 0.45, 0.50) were carried out by manual method in static air atmosphere. The total mass loss % and stepwise mass loss % values are in good agreement with theoretically calculated mass loss % values. The thermal decomposition of oxalate complexes occur at relatively lower temperatures (561 to 698 K). The lowering of decomposition temperatures may be attributed to earlier initiation of Fe2+ oxalate in oxalate complexes. At temperatures between 598–698 K the thermal decomposition of Cu-Mg-Zn-Fe solid solution oxalate complexes leads to formation of ferrites of spinel structure. After tampering at 873 and 1273 K, homogeneous ferrites arise, which is revealed from XRD studies.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1010133800797
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