Programme

O.23 -- Oral, NCTP-43

Date: Wednesday, 1 August 2018

Time: 16:20 - 16:40

Investigation of oxygen vacancy migration in yttria doped cerium

Le Thu Lam (1) and Vu Van Hung (2)

(1) Tay Bac University, Quyet Tam, Son La (2) University of Education, VNU Hanoi, 182 Luong The Vinh Street, Thanh Xuan District, Hanoi

Using the statistical moment method, the analytic expression of vacancy migration energy in yttria doped cerium (YDC) is derived within the fourth order moment approximation. This expression depends strongly on the interaction potentials between the diffusing oxygen ion and the surrounding cations. Our results show the predominant direction of oxygen vacancy migration and the influence of cation barriers on oxygen vacancy diffusion. The dependences of the migration energy on temperature and dopant concentration are evaluated in detail. Calculated results are compared with other theoretical results.

Presenter: Lê Thu Lam

Presentation file: