TY - JOUR
T1 - Studies on Sr substituted lanthanum indate as mixed ionic conductor
AU - Sood, Kapil
AU - Singh, K.
AU - Pandey, O. P.
N1 - Funding Information:
Acknowledgement The financial assistance for this study was provided by Department of Science and Technology (DST), New Delhi-India through letter No. SR/S2/CMP-0035/2011.
PY - 2012/6
Y1 - 2012/6
N2 - Sr substituted LaInO 3 compounds have been prepared by the conventional solid state reaction method. The as-prepared samples are characterized by X-ray diffraction (XRD), thermo-gravimetric analysis (TGA), differential thermal analysis (DTA), thermal expansion coefficient (TEC), and impedance spectroscopy. The XRD analysis of LSI 20 shows the formation of single phase La 0.9Sr 0.1InO 2.95 compound. However, the higher substitution of Sr 2+ for La 3+ leads to the formation of secondary insulating phase, i.e., SrIn 2O 4. Sr substitution leads to anionic vacancy which is the possible mechanism for ionic conduction in the given system. Reitveld refinement confirms orthorhombic phase formation in all the samples except LSI 23 (La 0.77Sr 0.23InO 2.89) which is well fitted monoclinic phase. TEC is nearly 9.1 × 10 -6 °C -1 in the range of 500-1000 °C in LSI 20 sample. The ionic conductivity is 0.11 mS cm -1 at 800 °C in single phase LSI 20 sample. The solid solubility limit is x = 0.20 which is higher than earlier reported values for similar systems.
AB - Sr substituted LaInO 3 compounds have been prepared by the conventional solid state reaction method. The as-prepared samples are characterized by X-ray diffraction (XRD), thermo-gravimetric analysis (TGA), differential thermal analysis (DTA), thermal expansion coefficient (TEC), and impedance spectroscopy. The XRD analysis of LSI 20 shows the formation of single phase La 0.9Sr 0.1InO 2.95 compound. However, the higher substitution of Sr 2+ for La 3+ leads to the formation of secondary insulating phase, i.e., SrIn 2O 4. Sr substitution leads to anionic vacancy which is the possible mechanism for ionic conduction in the given system. Reitveld refinement confirms orthorhombic phase formation in all the samples except LSI 23 (La 0.77Sr 0.23InO 2.89) which is well fitted monoclinic phase. TEC is nearly 9.1 × 10 -6 °C -1 in the range of 500-1000 °C in LSI 20 sample. The ionic conductivity is 0.11 mS cm -1 at 800 °C in single phase LSI 20 sample. The solid solubility limit is x = 0.20 which is higher than earlier reported values for similar systems.
UR - http://www.scopus.com/inward/record.url?scp=84861199618&partnerID=8YFLogxK
U2 - 10.1007/s10853-012-6297-2
DO - 10.1007/s10853-012-6297-2
M3 - Article
AN - SCOPUS:84861199618
SN - 0022-2461
VL - 47
SP - 4520
EP - 4529
JO - Journal of Materials Science
JF - Journal of Materials Science
IS - 11
ER -