504 Zr_<0.8-x>Ce_xY_<0.2>O_<1.9>多結晶の内部摩擦(セラミック材料の創成と評価,オーガナイズドセッション9.ナノ材料の創成と評価)

概要

論文の詳細を見る
CeO2-based ceramics is useful as oxide ion conductor, hoewever is reduced under reduction atmosphere so that some design for components is required. One of the methods is the formation of composites between ZrO2. In this system, the decreasing conductivity of oxide ions is observed by mixing ZrO2 and CeO2. In present research, the hopping behavior of oxygen between neighboring sites in crystal structures is examined by using the anelastic measurement of Y2O3 doped CeO2-ZrO2 solid solution. Using low-frequency torsion menaesurement of internal friction, we examined the activation energy and frequency of hopping of oxygen in a series of solid solution. By adding CeO2 the amount of moving oxygen in Y2O3 doped Zrl-xCexO2 decreased drastically. This indicates the modification of a local structure due to CeO2 addition leading immobility of oxygen in Zrl-xCexO2, when Y2O3 has been doped.
社団法人日本材料学会の論文
2007-05-18