High Saturation Induction for Bi-Substituted Yttrium Iron Garnet Prepared Via Sol Gel Technique
Noorhana Yahya and Goh Kah Hean
DOI : 10.3844/ajassp.2007.80.84
American Journal of Applied Sciences
Volume 4, Issue 2
Y3.0-xBixFe5O12 samples (x = 0.2 and 0.4) were prepared via novel sol-gel and conventional solid-state techniques. The effect of bismuth in both techniques was investigated in terms of shrinkage, density, hysteresis and initial permeability. Sharp and clear diffraction XRD lines with highest peak appear at about 32Â° of the 2Î¸, for all the powders sintered at 900Â°C and 1250Â°C for both techniques. In evaluating the magnetic properties, it was observed that the saturation induction (1.1902kG) of sample prepared via sol-gel technique (Y2.8Bi0.2Fe5O12) is more than 200% higher than sample with the same formula prepared via conventional technique. Fine grained microstructure with average grain size of about 5Î¼ m and higher shrinkage, about 11% were observed from the samples prepared via sol gel technique. It is concluded that samples prepared via sol gel technique appear to be an attractive route due to the possible reduction of cost of production and the enhanced magnetic and structural properties of the sample.
© 2007 Noorhana Yahya and Goh Kah Hean. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.