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※ 半角英数字
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アパタイト型ランタンシリケートの合成・結晶構造解析とイオン伝導特性

Synthesis, crystal structure refinement, and ionic transport properties of lantanum silicate with apatite structure

小林 清*; 吉田 晃*; 松下 能孝*; 西村 睦*; 尾山 由紀子*; 三好 正悟*; 泉 富士夫*; 井川 直樹   ; 山口 周*

Kobayashi, Kiyoshi*; Yoshida, Akira*; Matsushita, Yoshitaka*; Nishimura, Chikashi*; Oyama, Yukiko*; Miyoshi, Shogo*; Izumi, Fujio*; Igawa, Naoki; Yamaguchi, Shu*

La$$_{9.50}$$(SiO$$_{4}$$)$$_{6}$$O$$_{2.25}$$の伝導特性をA.C.法と酸素輸率測定によって、結晶構造をX線回折及び中性子回折法によって調べた。試料の結晶構造は空間群${it P}$6$$_{3}$$/${it m}$の六方晶アパタイト構造モデルで構造精密化できた。広い酸素分率及び温度範囲において酸化物イオン輸率が1である酸化物イオン伝導体であることが明らかになった。

Conduction properties of oxide ions and crystal structure refinement of La$$_{9.50}$$(SiO$$_{4}$$)$$_{6}$$O$$_{2.25}$$ have been made by A.C.-impedance, electro-motive force of oxygen concentration cell, X-ray and neutron diffraction methods using the sample fabricated by the sol-gel method. The crystal structure of the sample can be refined by structural model with ${it P}$6$$_{3}$$/${it m}$ space group. Oxide ion conductivity is found to be predominant in wide oxygen partial pressure and temperature range based on the conductivity and electro-motive force measurements.

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