Srfe12o19 Prepared By The Proteic Sol-gel Process

Powders of strontium hexaferrite (SrFe12O19) were prepared by the proteic sol-gel process using coconut water as a precursor. X-ray diffraction (XRD) measurement showed the formation of SrFe12O19 with a small amount of the hematite for the sample calcined at 1000 °C with Fe/Sr=12. Rietveld refinement disclosed that this sample had 87.56% of the SrFe12O19 and 12.44% of Fe2O3 and the values for Rp, Rwp and χ2 were 4.28%, 5.93% and 1.71, respectively. The magnetic properties were Ms=64 emu/g, Mr/Ms=0.55 and Hc=1.4 kOe for a crystallite size of 57 nm. © 2006 Elsevier B.V. All rights reserved.38401/02/159193Ataie, A., Heshmati-Manesh, S., (2001) J. Eur. Ceram. Soc., 21, p. 1951Chen, D.-H., Chen, Y.-Y., (2002) Mater. Res. Bull., 37, p. 801Guo, Z.B., Ding, W.P., Zhong, W., Zang, J.R., Do, Y.W., (1997) J. Magn. Magn. Mater., 175, p. 333Garcia, R.M., Ruiz, E.R., Rams, E.E., (2001) Mater. Lett., 50, p. 183Kaczmarek, W.A., Idzikowski, B., Muller, K.H., (1998) J. Magn. Magn. Mater., 177-181, p. 921Silva, M.N.B., Duque, J.G.S., Gouveia, D.X., Paiva, J.A.C., Macedo, M.A., (2004) Jpn. J. Appl. Phys., 43, p. 5249Martinez, N., Williams, A.J., Ebrahimi, S.A.S., Harris, I.R., (1999) J. Mater. Sci., 34, p. 2401Shinde, S.R., Bhagwat, A., Patil, S.I., Ogale, S.B., Mehta, G.K., Date, S.K., Marest, G., (1998) J. Magn. Magn. Mater., 186, p. 342Stoner, E.C., Wolhfarth, E.P., (1948) Trans. R. Soc. London, 240, p. 59