• Dr. K. Padma Prasad
• Dr. T. PRAKASH
• Dr. E.VISWANATHAN
• Prof. Dr. S. RAMASAMY

Mechanochemical synthesis method was utilized to synthesis nanocrystalline lanthanum doped BaTiO3 samples. The average crystallite size of the La doped BaTiO3 (LBT) has been found to be 23 nm, 27 nm, and 42 nm for the as-milled, 800 oC calcined, and 1000 oC calcined for 2 hours respectively. X-ray analysis confirmed the average crystallite size and phase purity. According to the findings, the phase of LBT has been solidified into tetragonal phase. The Williamson-Hall plot was used to calculate the stress development owing to lanthanum doping in the nanocrystalline LBT (nLBT) crystal structure and it displays the dominating stress in as-milled LBT compared with the other nanocrystalline. By doping La3+ into nanocrystalline BaTiO3 an attempt has been made to illustrate a “positive temperature coefficient of resistance (PTCR)” phenomena. From room temperature to 100 oC, all of the samples showed a three-order raise in resistivity (a PTCR characteristic). The 23 nm LBT sample, on the other hand, revealed a significant increase in resistivity, which is attributed to an increase in grain boundary induced resistance. The effects of grain size on conductivity and dielectric relaxation in nanostructured LBT have been carefully examined in this report, with detailed results and discussion.

Nanomaterials, mechanochemical synthesis, grain boundary, lattice strain, PTCR, Dielectric relaxation, conductivity, impedance spectroscopy

"Mechanochemical Synthesis of Nanostructured La doped BaTiO3 for PTCR Applications", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.9, Issue 2, page no.c53-c60, February-2022, Available :http://www.jetir.org/papers/JETIR2202225.pdf

"Mechanochemical Synthesis of Nanostructured La doped BaTiO3 for PTCR Applications", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.9, Issue 2, page no. ppc53-c60, February-2022, Available at : http://www.jetir.org/papers/JETIR2202225.pdf