材料科学
金红石
电子能量损失谱
钛酸钡
结晶度
煅烧
分析化学(期刊)
二氧化钛
钛酸酯
光谱学
钛
矿物学
钡
化学工程
透射电子显微镜
陶瓷
纳米技术
化学
冶金
复合材料
催化作用
工程类
物理
量子力学
生物化学
色谱法
作者
Hiroaki Matsumoto,Hiroshi Kakibayashi,Yoshihumi Taniguchi,I-Kuan Cheng,Ting-Tai Lee,Ching−Li Hu,Chun-Te Lee,Masayuki Y. Fujimoto
摘要
A mixture of ultrafine submicrometer‐sized BaCO 3 powder and TiO 2 (rutile) powder was calcined in air at 700°C, 800°C, and 900°C, and then quenched to liquid nitrogen temperature in each case. The cross‐sectional quenched specimens were characterized by spatially resolved electron energy‐loss spectroscopy ( SR ‐ EELS ). The energy‐loss near‐edge structures ( ELNES ) were sequentially extracted at 1.3 to 5.3 nm in width from SR ‐ EELS image obtained from the rectangularly cut SR ‐ EELS slit aperture put on the synthesized BaTiO 3 layer and TiO 2 rutile powder. The ELNES of Ti‐L 2,3 edges and Ba‐M 4,5 edges clearly show fine structure changes from the surface of BaTiO 3 layer to the TiO 2 bulk region reflected from crystallinity of synthesized BaTiO 3 , lattice distortion of TiO 2 caused by Ba diffusion, and lattice misfit between BaTiO 3 and TiO 2 without formation of Ba 2 TiO 4 and other titanate phases.
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