Effect of antimony substitution on structural and electrical properties of LaFeO3
IR@CECRI: CSIR-Central Electrochemical Research Institute, Karaikudi
View Archive Info| Field | Value | |
| Title |
Effect of antimony substitution on structural and electrical properties of LaFeO3
|
|
| Creator |
John Berchmans, L.
Sindhu, R. Angappan, S. Augustin, C.O. |
|
| Subject |
Electropyrometallurgy
|
|
| Description |
Fine crystalline LaFeO3 and antimony-substituted compounds have been prepared by coprecipitation
method. The as synthesized materials have been sintered at 1000 ◦C for
single-phase compound formation and evaluated for their electrical and structural properties.
TG/DTA studies ascribed that the precursor powders have undergone rapid changes
during the transformation of LaFeO3 and substituted compounds. XRD data reveal the presence
ofwell-defined sharp peaks, indicating the single-phase perovskite structure of LaFeO3
and polycrystalline structure of LaFeO3 and Sb2O3 compounds. The FT–IR spectra exhibit an
absorption band corresponding to Fe–O stretching vibration, which is shifted on the substitution
of Sb3+ ions. The temperature dependent d.c. conductivity shows the semiconducting
behavior of the synthesized materials. The band gap values are found to increase upto
x = 0.4 and decrease on further increase in concentrations of the Sb3+ ions. The decrease
in dielectric constant with increasing frequency explained the Maxwell–Wagner Interfacial
polarization model.
|
|
| Publisher |
Elsevier B.V.
|
|
| Date |
2008
|
|
| Type |
Article
PeerReviewed |
|
| Format |
application/pdf
|
|
| Identifier |
http://cecri.csircentral.net/340/1/098-2008.pdf
John Berchmans, L. and Sindhu, R. and Angappan, S. and Augustin, C.O. (2008) Effect of antimony substitution on structural and electrical properties of LaFeO3. Journal of Materials Processing Technology, 207 (1-3). pp. 301-306. ISSN 0924-0136 |
|
| Relation |
http://cecri.csircentral.net/340/
|
|