| Structural and Electrical Characterizations of Lanthanum Chromite: Effect of Synthesis Routes |
Pravin Kumar, Rajesh Kumar Singh and Prabhakar Singh
pages 239-242
DOI:10.1080/0371750X.2013.772752 |
| Abstract |
Lanthanum chromite (LaCrO3) was synthesized by two routes employing auto combustion and conventional solid state routes. Phase investigation of the prepared samples was carried out by powder X-ray diffraction techniques, which confirmed the single phase formation. Rietveld analysis of lanthanum chromite exhibited the orthorhombic structure with space group Pnma at room temperature. Well crystalline single phase of lanthanum chromite was obtained by calcination of powder at 1200oC by solid state technique and at 1000oC by auto combustion method. SEM images of lanthanum chromite exhibited the microstructure of crystals and the nature of agglomeration among them for both synthesis processes. Frequency and temperature dependent conductivity of the two samples revealed that conduction behaviour is independent of the synthesis route. The magnitude of DC conductivity for solid state sample was found to increase by little amount. SEM morphology and structural modes of vibrations were studied employing SEM and FTIR techniques, respectively.
[Keywords: Lanthanum chromite, Electrical conductivity, Synthesis route]
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