eprintid: 1254
rev_number: 7
eprint_status: archive
userid: 5
dir: disk0/00/00/12/54
datestamp: 2015-11-19 04:10:36
lastmod: 2015-11-19 09:20:39
status_changed: 2015-11-19 04:10:36
type: article
metadata_visibility: show
creators_name: Le, Dinh Trong
creators_name: Nguyen, Nang Dinh
creators_name: Pham, Duy Long
creators_id: dinhnn@vnu.edu.vn
title: Annealing Effect on the Ionic conductivity of La0,67-xLi3xTiO3 made by Double Mechanical Alloying Method
ispublished: pub
subjects: Phys
divisions: fac_physic
abstract: Perovskite La2/3-xLi3xTiO3 with x = 0.11 (called LLTO11) powders were prepared by double mechanical alloying method from TiO2 (99.99%), Li2CO3, (99.99%) and La2O3 (99.9%) powders, in ideal cation stoichiometry for La2/3-xLi3xTiO3. The obtained single phase of LLTO11 powder was isostatically pressed under a pressure of 450 MPa and annealed at a temperature ranging from 1,100 °C to 1,250 °C. Optimal morphology and grain structure for the ionic conductivity of the samples were achieved at annealing
temperature of 1,200 °C. For this ceramic, the lithium ionic grains and grain-boundaries conductivities at room temperature possess a value of 1.5 × 10-3 S/cm and 4.8 × 10-5 S/cm, respectively. The improvement in the grain-boundaries conductivity was explained due to the decrease of the number of grains, included grain boundaries and the diminution of the pores in LLTO samples annealed at 1,200 °C. The obtained results suggest useful applications of La(2/3)-xLi3xTiO3 (x = 0.11) ceramics for the production of the solid state electrolytes,for high-temperature Li-ionic batteries, in particular.
date: 2014
date_type: published
full_text_status: none
publication: Journal of Materials Science and Engineering B
volume: 4
number: 4
pagerange: 86-94
refereed: TRUE
issn: 2161-6221
citation:   Le, Dinh Trong and Nguyen, Nang Dinh and Pham, Duy Long  (2014) Annealing Effect on the Ionic conductivity of La0,67-xLi3xTiO3 made by Double Mechanical Alloying Method.  Journal of Materials Science and Engineering B, 4  (4).   pp. 86-94.  ISSN 2161-6221