Temperature dependent micro strain analysis of Lanthanum oxide nanoparticle using Williamson-Hall and size-strain plot methods

Abstract

Lanthanum oxide nanoparticles are prepared by chemical co-precipitation method using Lanthanum chloride and Ammonium carbonate as starting materials. DNA and STARCH is used as capping agent to maintain the particle size within the nanometer range. Elemental analysis of the sample is carried out through Energy Dispersive X-ray Analysis (EDAX). The structural characterization is carried out through XRD analysis. To confirm the formation of body centered cubic La2O3NPs, the Rietveld profile matching analysis is also done. The XRD peak broadening due to the intrinsic strain associated with particle size have been investigated using W-H and SSP methods. From the different models in W-H method, the micro structural parameters like strain, stress and energy density are calculated. To understand the temperature dependent nature of the samples, compare the results of the different samples obtained at different annealed temperatures 600 °C, 700 °C and 900 °C.