en گروه سرامیک Ceramic Materials and Engineering Research Paper Research Paper In this work, lithium meta titanate (Li₂TiO₃) nanocrystallites were synthesized by hydrothermal method and subsequent heat treatment. The shrinkage of the powder compact was measured under constant heating rate in order to study the sintering behavior of the synthesized powders. Densification curves of the synthesized powders were also constructed via the dilatometry analysis and evaluated at several heating rates. Two separate methods of analytical procedure and master curve sintering were employed to determine the activation energy of the initial sintering stage. The activation energy values were estimated based on these two distinct methods as 229±14 and 230 kJ/mol respectively, consistenting with each other. Moreover, surface diffusion was determined as the dominant mechanism of densification on initial sintering of Li₂TiO₃nanocrystallites. Tritium breeding, Sintering, Activation energy, Nano, dilatometry,Li2TiO3 nanocrystallites 43 52 http://ijmse.iust.ac.ir/browse.php?a_code=A-10-1869-1&slc_lang=en&sid=1 A. R. Abbasian abbasian@eng.usb.ac.ir 1800319475328460010245 1800319475328460010245 Yes Department of Materials Engineering, Faculty of Engineering, University of Sistan and Baluchestan, Zahedan, Iran M. R. Rahimipour m-rahimi@merc.ac.ir 1800319475328460010246 1800319475328460010246 No Ceramic Department, Materials and Energy Research Center, Karaj, 31787-316, Iran Z. Hamnabard zhamnabard@nrcam.org 1800319475328460010247 1800319475328460010247 No Lasers and Optics Research School, NSTRI, Tehran, 11365-8486, Iran