Programme

P.3 -- Poster, NCTP-43

Date: Tuesday, 31 July 2018

Time: 08:30 - 10:00

Effects of temperature and dopant concentration on oxygen vacancy diffusion coefficient of yttria-stabilized zirconia

Le Thu Lam (1), 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

Oxygen vacancy diffusion coefficient in yttria-stabilized zirconia (YSZ) are investigated by statistical moment method. Vacancy-dopant association energy, vacancy migration energy are calculated as a function of temperature and dopant concentration. Oxygen vacancy diffusion coefficient increases with the increasing temperature but decreases with the dopant concentration. This degradation of the diffusion coefficient arise from the limitation for oxygen vacancy migration across cation barriers with the increasing dopant concentration. Calculated results are in good agreement with other theoretical and experimental results.

Presenter: Lê Thu Lam

Presentation file: