RESUMEN
Samples of copper ferrite, CuFe2O4, were prepared using both dry and wet processes, either from powders of iron oxide or from interaction of copper and iron sulfates, or co-precipitation of copper and iron hydroxides from homogeneous sulphate solutions at different pH values. Also, a sample of copper ferrite was prepared in optimum conditions from copper scraps. The effects of temperature and time of ferritization were studied. The prepared samples were investigated by X-ray diffraction analysis, differential thermal analysis, DTA, and scanning electron microscopy, SEM. Optimum conditions were found to depend on the input materials, the pH values, time and temperature
Asunto(s)
Hierro/química , Compuestos de Hierro/química , Compuestos FérricosRESUMEN
The mixed ferrites Li0.35 Zn0.30 Tix Fe2.35-x O4 [where x 0.0 to 1.0] were prepared using standard ceramic methods and were sintered at 1150 in static air atmosphere. The formation of ferrite spinel structure was investigated using X-ray diffraction and IR techniques. It was found, that samples with Ti content [x <0.2] have a spinel cubic structure. With increasing titanium content, bulk density and diameter shrinkage were found to decrease, while apparent porosity and grain size increased. Samples with x >0.2 were found to have more than one structural phase