Title: Preparation of Ca modified Li₂TiO₃ ceramics pebbles and its activation energy calculation

Authors: Mohit Kumar; Rohit Kumar Sinha; Shlok Yadav; S.K. Sinha; P.M. Raole

Addresses: School of Creative Learning, Patna, 801503, India ' School of Creative Learning, Patna, 801503, India ' Department of Physics, Birla Institute of Technology, Patna, 800014, India ' Department of Physics, Birla Institute of Technology, Patna, 800014, India ' Institute for Plasma Research, Gandhinagar, 382428, India

Abstract: Ca modified lithium titanate (Li₂TiO₃) ceramics pebbles were prepared by method of sol-gel followed by urea-aceton spherodisation technique. Lithium titanate having monoclinic structure in pure phase was obtained. DTA/TG analysis of green sample was carried out to know the thermal reactions. Calcinations temperature was determined as 600°C. ICP test of sample was carried out to determine the purity of sample. Laser flash method was used to study thermal conductivity and diffusivity of the ceramics. The thermal conductivity of the sample at room temperature was about 3 W/m/K, which fell down to ~2.5 W/m/K at 600°C, after which it rises gradually to 4.0 W/m/K at 1000°C. Activation energy was calculated using Arrhenius equation and was obtained as 1.03 8eV/mole.

Keywords: lithium titanate; breeder material; sol.gel; thermal conductivity; activation energy.

DOI: 10.1504/IJMATEI.2017.090243

International Journal of Materials Engineering Innovation, 2017 Vol.8 No.3/4, pp.273 - 281

Received: 06 Jul 2017
Accepted: 22 Oct 2017
Published online: 06 Mar 2018 *

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