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Author (up) Rendon, R.C.; Salvo, C.; Sepulveda, E.; Arulraj, A.; Sanhueza, F.; Rodriguez, J.J.; Mangalaraja, R.V. doi  openurl
  Title Evaluation of Structural and Functional Properties of La0.6Sr0.4MnO3 Perovskite Prepared by the Fast Solution Combustion Approach Type
  Year 2022 Publication Catalysts Abbreviated Journal Catalysts  
  Volume 12 Issue 12 Pages 1636  
  Keywords LSM; fast solution combustion synthesis; microstructure; hardness; resistivity  
  Abstract A series of La0.6Sr0.4MnO3 (LSM) perovskite was made using the rapid solution combustion method, which was calcined by varying the temperatures. In order to determine how the calcination temperature affected the nanopowders produced and calcined at various temperatures, their microstructural, morphological, compositional, optical, and electrical properties were analyzed using corresponding characterization tools. The XRD results showed the coexistence of the rhombohedral polymorphs R-3c and Pm-3m for the perovskite phase under a calcination temperature of 1400 degrees C, which were eliminated with increased calcination temperature. The average grain size was found to increase with increasing calcination temperature. The EDS analysis showed better agreement of the stoichiometry with the theoretical composition. The apparent porosity decreased with increasing temperature due to the coalescence of sintering pores. The sample obtained after calcination at 1500 degrees C showed 10.3% porosity. The hardness also improved with increasing calcination temperature and reached a maximum value of 0.4 GPa, which matched the bulk density. A similar trend was observed in the resistivity studies as a function of temperature, and all the samples exhibited a low resistivity of similar to 1.4 Omega.cm in the temperature range of 500-600 degrees C. The optical characterization showed broad absorption at 560-660 nm and bandwidth values between 3.70 and 3.95 eV, according to the applied heat treatment.  
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  ISSN 2073-4344 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000902326100001 Approved  
  Call Number UAI @ alexi.delcanto @ Serial 1703  
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