Structure and infrared radiation property of Co_1−xZn _xFe₂O₄ ferrites by XAFS analysis

Abstract

Co_1−xZn _xFe₂O₄ ferrites were prepared by solid state reaction. The microstructure and performance were studied by X-ray diffraction, X-ray absorption fine-structure analysis and IRE-2 infrared radiant test. It is found that infrared radiance show a nonlinear change with x, exhibiting the infrared radiance of this material improved and the average radiance in the 8–14 µm waveband reached 0.91. The Co³⁺ and Zn²⁺ ions are found to occupy both tetrahedral and octahedral sites, and correspondingly, the fraction of Fe³⁺ ions in B-site decreases nonlinearly in ferrites. The lattice parameters are found to concern with Zn²⁺, and the activation energy deduces from crystal strain and crystal vibrate increases with content Zn²⁺. The redistribution of the Co³⁺ and Zn²⁺ ions between tetrahedral and octahedral sites is related to the providing a selective tetrahedral and octahedral sites infrared radiance of Co_1−xZn _xFe₂O₄ ceramics with increasing x.

Keywords

ferrites / XAFS / crystal structure / infrared radiation property

References

[1] Nakatsuka A., Ikeda Y. Cation Distribution Bond Lengths in CoAl₂O₄ Spinel[J]. Solid State Commun., 2003, 128: 85-87.

[2] Zhang Y., Wen D. J. Relationship between Infrared Radiation and Crystal Structure in Fe-Mn-CO-Cu-O Spinels[J]. Acta Metall. Sin., 2008, 21: 16-19.

[3] Xu Q., Song C. W., Chen W., . Structure and Infrared Radiation Properties of Substituted Cordierites[J]. Journal of Wuhan University of Technology-Mater. Sci. Ed., 2006, 21(4): 68-70.

[4] Nishio H., Yamamoto H. Study of Recording Performances for Co-Ni-Mn Spinel Fine-particle Media[J]. J. Magn. Soc. Japa., 2006, 30: 73-76.

[5] Kustova G. N., Burgina E. B. IR Spectroscopic Investigation of Cation Distribution in Zn-Co Oxide Catalysts with Spinel Type Structure[J]. J. Mol. Cata. A-Chem., 2000, 158: 293-296.

[6] Ferchmin A. R., Klama S. Influence of Disorder on the Magnetic Properties of Ferrites with Spinel Structure: Application to Magnetite[J]. J. Phys., B, 1979, 29: 883-892.

[7] Solyman S. Transport Properties of La-doped Mn-Zn Ferrite [J]. Ceramic International., 2006, 32: 755-760.

[8] Peña Ma Y. W., Barahona P. Magnetic Properties of NiMn_2−xCo_xO₄ Spinel Oxides[J]. J. Eur. Ceram., Soc., 2005, 25: 3051-3054.

[9] Dunlap R. A., Alghamdi A., O’Brien J. W. A Mössbauer Effect Investigation of Superparamagnetic Behavior in Ball Milled Mn-Zn Ferrites[J]. J. Alloys Comp., 2004, 365: 84-88.

[10] Wang S. M., Liang K. M. Crystallization Behavior and Infrared Radiation Property of Nickel-magnesium Cordierite Based Glass-ceramics[J]. J. Non-Cryst. Solids, 2008, 354: 1522-1525.

[11] Chen M. Y., Chang P. J., Chia C. T., . Extended X-ray Absorption Fine Structure, X-ray Diffraction and Raman Analysis of Nickel-doped Ba(Mg_1/3Ta_2/3)O₃[J]. J. Eur. Cera. Soc., 2007, 27: 2995-2999.

[12] Iwanowski R. L. Tetrahedral Covalent Radii of Mn, Fe, Co and Ni Estimated from Extended X-ray Absorption Fine Structure Studies[J]. Chem. Phys. Lett., 1998, 283: 313-318.

[13] Kwak W. C., Sung Y. M. Influence of Cation Substitution on the Phase Formation Kinetics of Sr_0.7Bi_2.3Ta₂O₉ Thin Films[J]. J. Eur. Cera. Soc., 2004, 24: 1603-1606.

[14] Wei S. Q., Yan W. S., Li Y. Z., . Structural Transitions of Mechanically Alloyed Fe_100−xCu_x Systems Studied by X-ray Absorption Fine Structure[J]. Phys., B, 2001, 305: 135-142.

[15] Li J. P., Wu W. F. The Cation Distribution in NiFe₂O₄-ZnFe₂O₄ Spinel Solid Solutions[J]. Acta Pet. Et Mineral., 2000, 19(4): 376-381.