Conductivity and electric properties of La1-xSrxMnO3-δ nanopowders

稀土学报(英文版), 2009, 27(4): 651-654. doi: 10.1016/S1002-0721(08)60308-7

^1, , ^2, , ^3, , ^4, , ^5,

1.Institute for Low Temperature and Structure Research,Polish Academy of Sciences,P.O.Box 937,50-442 Wroclaw,Poland

2.Chemical Engineering Department,National Technical University,Athens 9 Heroon Polytechniou Str.,15773 Athena,Greece

3.Chemical Engineering Department,National Technical University,Athens 9 Heroon Polytechniou Str.,15773 Athena,Greece

4.Electrotechnical Institute Division,Electrotechnalogy and Materials,Wroclaw,Poland

5.Institute for Low Temperature and Structure Research,Polish Academy of Sciences,P.O.Box 937,50-442 Wroclaw,Poland

基金项目: Bilateral S & T Cooperation between the Hellenic Republic and the Republic of Poland(2005-2007)

Conductivity and electric properties of La1-xSrxMnO3-δ nanopowders

R.J.Wiglusz ^1, , A.Gaki ^2, , G.Kakali ^3, , A.Chuchrna(l)a ^4, , W.Str(e)k ^5,

1.Institute for Low Temperature and Structure Research,Polish Academy of Sciences,P.O.Box 937,50-442 Wroclaw,Poland

2.Chemical Engineering Department,National Technical University,Athens 9 Heroon Polytechniou Str.,15773 Athena,Greece

3.Chemical Engineering Department,National Technical University,Athens 9 Heroon Polytechniou Str.,15773 Athena,Greece

4.Electrotechnical Institute Division,Electrotechnalogy and Materials,Wroclaw,Poland

5.Institute for Low Temperature and Structure Research,Polish Academy of Sciences,P.O.Box 937,50-442 Wroclaw,Poland

Keywords： LSMO

La0.8Sr0.2MnO3-δ was synthesized by the Pechini's method.The XRD pattern and TEM indicate the formation of the perovskite without the presence of secondary phases.It was found that La0.8Sr0.2MnO3-δ sample prepared at 1000 ~C in air atmospheres,contains about 13.11% of the manganese as Mn4+ and 86.89% of the manganese as Mn3+.The electric measurements were carried out for La0.8Sr0.2MnO3-δ nanoceramics by using impedance spectroscopy methods and found to be 0.1 S/cm at 250 ℃ similar to the typical value of La0.8Sr0.2MnO3-δ materials.Its dependence on reciprocal temperature shows quite complicated mechanism of conduction.

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