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AdvSciTech72_2010_343.pdf176KbAdobe PDF見る/開く
タイトル :A Chemical Bonding Approach to Ionic Conduction and Thermal Expansion in Oxide Ion Conductors
著者 :Taniguchi, Sachi
Aniya, Masaru
刊行年月日 :2010-10-27
収録雑誌名 :Advances in Science and Technology
巻 :72
開始ページ :343
終了ページ :347
要約(Abstract) :In complex perovskite-type oxides which have been studied as cathode materials, the thermal expansion coefficient increases with the increase in the oxygen ionic conductivity. In the present study, with the aim to explain such a behavior, a research has been carried out from a chemical bond point of view. For oxides A1-xA′xB1-yB′yO3-δ with perovskite structure, the ionicity of the individual bond, A-O and B-O, and the thermal expansion coefficient of mixed compounds were estimated by using semiempirical methods. It has been shown that the thermal expansion coefficient and the oxygen ionic conductivity decrease with the increase in the difference of the ionicity between A-O and B-O bonds. It is also found that the tolerance factor and the specific free volume are linearly correlated with the difference of ionicity.
URL :http://www.scientific.net/AST.72.343
収録種別 :雑誌掲載論文
出版社(者) :Trans Tech Publications
権利(Rights) :© 2010 Trans Tech Publications
URI :http://hdl.handle.net/2298/24324
出現コレクション:発表論文(理学系)
このアイテムの引用には次の識別子を使用してください: http://hdl.handle.net/2298/24324

 

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