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Effect of sintering on X-Ray and IR spectral behaviour of the MnAlxFe2-xO4 ferrite system

1996; Wiley; Volume: 156; Issue: 1 Linguagem: Inglês

10.1002/pssa.2211560105

1521-396X

O. M. Hemeda, M.A. Amer, S. Aboul-Enein, M.A. Ahmed,

Electromagnetic wave absorption materials

physica status solidi (a)Volume 156, Issue 1 p. 29-38 Article Effect of sintering on X-Ray and IR spectral behaviour of the MnAlxFe2-xO4 ferrite system O. M. Hemeda, O. M. Hemeda Physics Department, Faculty of Science, Tanta University Search for more papers by this authorM. A. Amer, M. A. Amer Physics Department, Faculty of Science, Tanta University Search for more papers by this authorS. Aboul-Enein, S. Aboul-Enein Physics Department, Faculty of Science, Tanta University Search for more papers by this authorM. A. Ahmed, M. A. Ahmed Physics Department, Faculty of Science, Tanta University Search for more papers by this author O. M. Hemeda, O. M. Hemeda Physics Department, Faculty of Science, Tanta University Search for more papers by this authorM. A. Amer, M. A. Amer Physics Department, Faculty of Science, Tanta University Search for more papers by this authorS. Aboul-Enein, S. Aboul-Enein Physics Department, Faculty of Science, Tanta University Search for more papers by this authorM. A. Ahmed, M. A. Ahmed Physics Department, Faculty of Science, Tanta University Search for more papers by this author First published: 16 July 1996 https://doi.org/10.1002/pssa.2211560105Citations: 22 Tanta, Egypt. AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onEmailFacebookTwitterLinkedInRedditWechat Abstract Two series of the samples of the ferrite system MnAlxFe2-xxO4 were prepared using the usual ceramic technique and sintered at 1200 and 1350 °C for 6 h, respectively. X-ray and IR spectral analyses for the two series were studied. The true lattice parameters were calculated for the two series and were found to decrease with increasing Al substitution. The bulk and X-ray densities also decreased as the Al content increased due to the reduction of oxygen vacancies and the decreasing population of Fe3+ in octahedral sites. The density of the sample sintered at 1350 °C is higher than that sintered at 1200 °C. The porosity increased with increasing Al substitution. The distance between magnetic ions in both octahedral and tetrahedral sites decreased with increasing Al. The far-infrared spectra in the range 660 to 200 cm−1 are reported. Two absorption bands n̈1 ≈︁ 600 cm−1, n̈2 ≈︁ 450 cm−1 appeared in the spectra which were assigned to the tetrahedral and octahedral complexes, respectively. Another band n̈3 ≈︁ 350 cm−1 is assigned to the divalent octahedral Fe2+-O2− ion complex. A small band n̈4 appears at higher concentration of Al which is attributed to the Al3+-O2− complex at octahedral sites. References 1 A. Michel and E. Pouillard, C. R. Acad. Sci. (France) 227 194 (1948). 2 G. O. Jones and F. F. Roberts, Proc. Phys. Soc. (London) B 65 390 (1952). 3 G. E. Bacan and F. F. Roberts, Acta cryst. 6 57 (1933). 4 F. F. Bertaut, J. Phys. Radium 12 252 (1951). 5 F. J. W. Verwey and E. L. Heilmann, J. chem. Phys. 15 174 (1947). 6 M. A. Ahmed, M. A. El Hiti, and M. E. El Shabasy, Fizika A 3 1 (1994). 7 M. A. Ahmed, A. Tawfik, M. K. El-Nimr, and M. A. El-Hasab, J. Mater. Sci. Letters 10 549 (1991). 8 S. Radhakrishna and K. V. S. Badarinath, J. Mater. Sci. Letters 3 807 (1984). 9 R. L. Maxwell and S. J. Pickart, Phys. Rev. 92 5 (1953). 10 S. A. Mazen and B. A. Sabrah, Thermochim. Acta 105 1 (1986). 11 N. Reslescu and E. Cuciureanu, Phys. stat. sol. (a) 3 873 (1970). 12 J. Tasaki and T. Izushi, J. Physique 38, C4-175 (1977). 13 F. A. Miller, J. L. Carlson, F. F. Bently, and W. H. Jones, Spectrochim. Acta 16 135, 149, 164 (1960). 14 S. A. Mazen, A. E. Abd El-Rahim, and B. A. Sabrah, J. Mater. Sci. 22 4177 (1987). 15 E. S. Subba Rao, J. Amer. Ceram. Soc. 43 19 (1960). 16 H. T. Kim and H. B. Im, J. Mater. Sci. 22 1235 (1987). 17 H. Pascard, A. Globus, and V. Cabon, J. Physique 38, C1-163 (1977). 18 B. Viswanathan and V. R. K. Murthy, Ferrite Material Science and Technology, Narosa Publ. House, New Delhi 1990. 19 St. Hafner, Z. Krist. 115 331 (1961). Citing Literature Volume156, Issue116 July 1996Pages 29-38 ReferencesRelatedInformation