Article ID Journal Published Year Pages File Type
1291005 Journal of Power Sources 2007 7 Pages PDF
Abstract
Ageing effects in the defect fluorite structure of Bi3Nb1−xYxO7−x have been studied using powder neutron diffraction. Two compositions at x = 0.4 and x = 0.6 were studied after annealing for prolonged times (400-500 h) at 410 and 550 °C. The results show that significant changes in oxide ion distribution occur at 550 °C, but that at 410 °C only the lower x-value composition exhibited such a change. A comparison of lattice parameter variation with temperature for annealed and unannealed samples suggests that at higher temperatures the oxide ion distribution is independent of thermal history.
Related Topics
Physical Sciences and Engineering Chemistry Electrochemistry
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