Temperature Dependence of the Magnetic and Electric Properties of CaFe O
1352 22 5
where the formation of Fe3O4 phase changes the grain
size in sample.
5. Acknoledgements
The authors thank this work to the Telecommunications
and Materials Science and Engineering Laboratory
(LOCEM) Physics Department, Federal, University of
Ceará-Brazil.
REFERENCES
[1] L. A. Isupova, S. W. Tsybulya, G. N. Kryukova, A. A.
Budneva, E. A. Paukshtis, G. S. Litvak, V. P. Ivanov, V.
N. Kolomiichuk, Yu. T. Pavlyukhin and V. A. Sadykov,
“Mechanochemical Synthesis and Catalytic Properties of
the Calcium Ferrite Ca2Fe2O5,” Kinetics and Catalysis,
Vol. 43, No. 1, 2002, pp. 122-128.
doi:10.1023/A:1014217716883
[2] A. A. Colville, “Structural Crystallography and Crystal
Chemistry,” Acta Crystallographica, Vol. B26, 1970, pp.
1469-1473.
[3] J. Berggren, “Refinement of the Crystal Structure of Di-
calcium Ferrite, Ca2Fe2O5,” Acta Chemica Scandinavica,
Vol. 25, 1971, pp. 3616-3624.
doi:10.3891/acta.chem.scand.25-3616
[4] E. F. Bertaut, P. Blum and A. Sagnières, “Structure du
ferrite bicalcique et de la brownmillerite,” Acta Crystallo-
graphica, Vol. 12, No. 2, 1959, pp. 149-159.
doi:10.1107/S0365110X59000433
[5] V. A. Sadykov, L. A. Isupova, S. F. Tikhov and O. N.
Kimkhai, “Synthesis and Properties of Advanced Ceramic
Materials,” Materials Research Society Symposium Series,
MRS Fall Meeting, Vol. 386, 1995, p. 293.
[6] B. Lazić, H. Krüger, V. Kahlenberg, J. Konzett and R.
Kaindl, “Incommensurate Structure of Ca2Al2O5 at High
Temperatures-Structure Investigation and Raman Spec-
troscopy,” Acta Crystallographica, Vol. B64, No. 4, 2008,
pp. 417-425.
[7] L. M. Corliss, J. M. Hastings, W. Kunnmann and E.
Banks, “Magnetic Structures and Exchange Interactions
in the Systems CaCrxFe2–xO4 and Ca2CrxFe2–xO5,” Acta
Crystallographica, Vol. 21, 1966, p. A95.
[8] R. W. Grant, S. Geller, H. Wiedersich, U. Gonser and L.
D. Fullmer, “Spin Orientation and Magnetic Properties of
Ca2FeAlO5,” Journal of Applied Physics, Vol. 39, No. 2,
1968, pp. 1122-1123. doi:10.1063/1.1656192
[9] T. Takeda, Y. Yamaguchi, S. Tomiyoshi, M. Fukase, M.
Sugimoto, H. Watanabe, “Magnetic Structure of
Ca2Fe2O5,” Journal of the Physical Society of Japan, Vol.
24, No. 3, 1968, pp. 446-452. doi:10.1143/JPSJ.24.446
[10] S. Geller, R. W. Grant and L. D. Fullmer, “Magnetic
Structures in the Ca2Fe2–xAlxO5 System,” Journal of
Physics and Chemistry of Solids, Vol. 31, No. 4, 1970, pp.
793-803. doi:10.1016/0022-3697(70)90213-1
[11] S. Geller, R. W. Grant and U. Gonser, “Crystal Chemistry
and Magnetic Structures of Substituted Ca2[Fe](Fe)O5,”
Progress in Solid State Chemistry, Vol. 5, 1971, pp. 1-26.
doi:10.1016/0079-6786(71)90015-X
[12] P. Berastegui, S. G. Eriksson and S. Hull, “A Neutron
Diffraction Study of the Temperature Dependence of
Ca2Fe2O5,” Materials Research Bulletin, Vol. 34, No. 2,
1999, pp. 303-314. doi:10.1016/S0025-5408(99)00007-0
[13] A. L. Shaula, Y. V. Pivak, J. C. Waerenborgh, P. Gac-
zyñski, A. A. Yaremchenko and V. V. Kharton, “Ionic
Conductivity of Brownmillerite-Type Calcium Ferrite
under Oxidizing Conditions,” Solid State Ionics, Vol. 177,
No. 33-34, 2006, pp. 2923-2930.
doi:10.1016/j.ssi.2006.08.030
[14] C. N. R. Rao and J. Gopalakrishnan, “New Directions in
Solid State Chemistry: Structure, Synthesis, Properties,
Reactivity, and Materials Design,” Cambridge University
Press, Cambridge, 1986.
[15] Y. Yang, Z. Cao, Y. Jiang, L. Liu and Y. Sun, “Photo-
induced Structural Transformation of SrFeO3 and
Ca2Fe2O5 during Photodegradation of Methyl Orange,”
Materials Science and Engineering: B, Vol. 132, No. 3,
2006, pp. 311-314. doi:10.1016/j.mseb.2006.03.031
[16] D. Hirabayashi, T. Yoshikawa, K. Mochizuki, K. Suzuki
and Y. Sakai, “Formation of Brownmillerite Type Cal-
cium Ferrite (Ca2Fe2O5) and Catalytic Properties in Pro-
pylene Combustion,” Catalysis Letters, Vol. 110, No. 3-4,
2006, pp. 269-274. doi:10.1007/s10562-006-0120-0
[17] D. Hirabayashi, Y. Kawamoto and K. Suzuki, “Catalytic
Decomposition of Vocs and Chlorine Fixation on Cal-
cium Ferrites with Brownmillerite Type Structure,” Jour-
nal of the Society of Inorganic Materials, Japan, Vol. 14,
No. 327, 2007, pp. 83-91.
[18] S. Shin, Y. Hatakeyama, K. Ogawa and K. Shimomura,
“Catalytic Decomposition of Nitric Oxide over Brown-
millerite-Like Compounds, Calcium Ferrate(III)
(Ca2Fe2O5) and Strontium Ferrate(III) (Sr2Fe2O5),”
Materials Research Bulletin, Vol. 14, No. 1, 1979, pp.
133-136. doi:10.1016/0025-5408(79)90241-1
[19] J. H. White, A. F. Sammells and J. D. Wander, “Catalysts
for Direct Decomposition of NOx in Exhausts,” Pro-
ceedings of the 93rd Air and Waste Management Asso-
ciation’s Annual Conference and Exhibition, Salt Lake
City, UT, United States, 2000.
[20] E. Woermann, W. Eysel, T. Hahn, “Polymorphism and
Solid Solution of the Ferrite Phase,” Proceedings of the
Fifth International Symposium on the Chemistry of Ce-
ment, Tokyo, Supplementary Paper I-54, 1968, pp. 54-
60.
[21] G. J. Redhammer, G. Tippelt, G. Roth and G. Amthauer,
“Structural Variations in the Brownmillerite Series
Ca2(Fe2–xAlx)O5: Single-Crystal X-Ray Diffraction at
25±˚C and High-Temperature X-Ray Powder Diffraction
(25±˚C · T · 1000±˚C),” American Mineralogist, Vol. 89,
2004, pp. 405-420.
[22] K. Fukuda and H. Ando, “Determination of the
Pcmn=Ibm2 Phase Boundary at High Temperatures in the
System Ca2Fe2O5-Ca2Al2O5,” Journal of the American
Ceramic Society, Vol. 85, No. 5, 2002, pp. 1300-1303.
doi:10.1111/j.1151-2916.2002.tb00263.x
Copyright © 2011 SciRes. MSA