M. Anis-Ur-Rehman, G. Asghar
Jan 12, 2011
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Quality indicators
Journal
Journal of Alloys and Compounds
Abstract
Abstract Nanoparticles of strontium ferrites with nominal composition SrFe 12 O 19 were prepared by co-precipitation method, by decreasing pH from 13 to 8 with a regular step of 1. The secondary phase of α-Fe 2 O 3 was increased with the decrease in pH. The crystallite size estimated from X-rays diffraction data was in the range 52–70 nm, which is much smaller than that already reported. Most of the particles formed had hexagonal structure, as observed by the scanning electron microscopy. Particle size and dielectric loss were increased where as dc electrical resistivity and dielectric constant were decreased with decrease in pH. The results show that the material synthesized with higher pH is phase pure and is potentially more suitable for high frequency applications.