Study on the Nonstoichiometry and Chemical Properties of (Sr,M)FeO3-y Perovskite-Related Ferrite System(M-La)

Eun-Seok Lee

Journal of Industrial and Engineering Chemistry, Vol.2, No.2, 151-156, November, 1996

Department of Chemistry, Chongju University, Chongju 360-764, Korea

The solid solutions of oxides; A : SrLaFeO_4-y having a K₂NiF₄-type layer structure, and B : LaFeO_3-y, C : La_0.8Sr_0.2FeO_3-y, D : SrFeO_3-y, E : SrO_0.9La_0.1FeO_3-y with perovskite structures have been prepared at 1200℃ under the atmospheric air pressure. Nonstoichiometric chemical formulas have been formulated from the data such as τ (amount of Fe⁴⁺ ion) and y (oxygen deficiency) values from Mohr salt analysis. Electrical conductivity measurements performed in the temperature range 283∼1173 K under atmospheric air pressure shows that sample B containing nearly 100% trivalent iron is an insulator, whereas the other samples (τ≠0) show semiconducting behaviour. Sample A with typical tetragonal K₂NiF₄ structure shows a transition point at 363 K. At that point the log conductivity value increases from -2.20 to -1.71. Samples C, D, E have their peaks at 643K, 583K, 723K, respectively and thence semiconductivity changes into metallic property.

[References]

Yo CH, Lee SJ, J. Nat. Sci. Res. Ins., 14, 43 (1985)
Yo CH, Lee ES, Pyon MS, J. Solid State Chem., 58, 411 (1988)
Yamamura H, Hadena H, Shirasaki S, Dakada K, J. Solid State Chem., 86, 1 (1981)
Takano M, Kawachi J, Nakanishi N, Dakeda Y, J. Solid State Chem., 39, 75 (1981)
Watanabe H, J. Phys. Soc. Jpn., 12, 515 (1957)
Yamamura H, Kiriyama R, Bull. Chem. Soc. Jpn., 45, 2702 (1972)
Shimony U, Knudsen JM, Phys. Rev., 144, 361 (1966)
Galiagher PK, Macchesney JB, Buchanan DNE, J. Chem. Phys., 41, 2429 (1964)
Wattiaux A, Grenier JC, Porchard M, Hagenmuller P, J. Electrochem. Soc., 134, 1714 (1987)
Wattiaux A, Grenier JC, Porchard M, Hagenmuller P, J. Electrochem. Soc., 134, 1718 (1987)
LeFrem G, Demazeau G, Hagenmuller P, J. Solid State Chem., 44, 82 (1982)
Yo CH, Lee ES, Pyon WB, Pyon MS, J. Korean Chem. Soc., 32, 3 (1988)
Menil F, Kinomura N, Fournes L, Portier J, Hagenmuller P, Phys. Stat. Sol., 64, 261 (1981)
Soubeyroux JL, Courbin P, Fournes L, Fruchart D, LeFlem G, J. Solid State Chem., 31, 313 (1980)
Demazeau G, LiMing Z, Fournes L, Pouchard M, Hagenmuller P, J. Solid State Chem., 72, 31 (1988)
Nguyen-trut-dinh MM, Vlasse M, Perrin M, LeFrem G, J. Solid State Chem., 32, 1 (1980)
Shimada M, Koizumi M, Dakano M, Shinjo T, Takada T, J. De Phisique., 40(C2), 272 (1979)
Fujihara S, Nakada T, Kozuka H, Yoko T, J. Solid State Chem., 115, 456 (1995)
Adler P, J. Solid State Chem., 108, 275 (1994)
Gallagher PK, Macchesney JB, Buchanan DNE, J. Chem. Phys., 45, 2466 (1966)
Drofenik M, Hanzel D, Zupan J, Mater. Res. Bull., 8, 1337 (1973)
Lee ES, J. Ind. Sci. Res., 10, 167 (1992)
Waugh JS, Technical Report, Massachusetts Ins. Tech., No. 152 (1960)

[Referenced By]

[1] Yo CH, Lee SJ, J. Nat. Sci. Res. Ins., 14, 43 (1985)

[2] Yo CH, Lee ES, Pyon MS, J. Solid State Chem., 58, 411 (1988)

[3] Yamamura H, Hadena H, Shirasaki S, Dakada K, J. Solid State Chem., 86, 1 (1981)

[4] Takano M, Kawachi J, Nakanishi N, Dakeda Y, J. Solid State Chem., 39, 75 (1981)

[5] Watanabe H, J. Phys. Soc. Jpn., 12, 515 (1957)

[6] Yamamura H, Kiriyama R, Bull. Chem. Soc. Jpn., 45, 2702 (1972)

[7] Shimony U, Knudsen JM, Phys. Rev., 144, 361 (1966)

[8] Galiagher PK, Macchesney JB, Buchanan DNE, J. Chem. Phys., 41, 2429 (1964)

[9] Wattiaux A, Grenier JC, Porchard M, Hagenmuller P, J. Electrochem. Soc., 134, 1714 (1987)

[10] Wattiaux A, Grenier JC, Porchard M, Hagenmuller P, J. Electrochem. Soc., 134, 1718 (1987)

[11] LeFrem G, Demazeau G, Hagenmuller P, J. Solid State Chem., 44, 82 (1982)

[12] Yo CH, Lee ES, Pyon WB, Pyon MS, J. Korean Chem. Soc., 32, 3 (1988)

[13] Menil F, Kinomura N, Fournes L, Portier J, Hagenmuller P, Phys. Stat. Sol., 64, 261 (1981)

[14] Soubeyroux JL, Courbin P, Fournes L, Fruchart D, LeFlem G, J. Solid State Chem., 31, 313 (1980)

[15] Demazeau G, LiMing Z, Fournes L, Pouchard M, Hagenmuller P, J. Solid State Chem., 72, 31 (1988)

[16] Nguyen-trut-dinh MM, Vlasse M, Perrin M, LeFrem G, J. Solid State Chem., 32, 1 (1980)

[17] Shimada M, Koizumi M, Dakano M, Shinjo T, Takada T, J. De Phisique., 40(C2), 272 (1979)

[18] Fujihara S, Nakada T, Kozuka H, Yoko T, J. Solid State Chem., 115, 456 (1995)

[19] Adler P, J. Solid State Chem., 108, 275 (1994)

[20] Gallagher PK, Macchesney JB, Buchanan DNE, J. Chem. Phys., 45, 2466 (1966)

[21] Drofenik M, Hanzel D, Zupan J, Mater. Res. Bull., 8, 1337 (1973)

[22] Lee ES, J. Ind. Sci. Res., 10, 167 (1992)

[23] Waugh JS, Technical Report, Massachusetts Ins. Tech., No. 152 (1960)