کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1620579 | 1516391 | 2009 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Observation of octahedral tilted in Sr0.5TaO3 prepared by nanosheet processing: An EXAFS study
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The metastable crystal structure of Sr0.5TaO3 with pseudo-cubic structure was investigated by X-ray diffraction analyses and extended X-ray absorption fine structure. Sr0.5TaO3 powders were synthesized from the host material of H2Sr1.5Ta3O10 by direct dehydration and nanosheet processing. The structure of Sr0.5TaO3 is suggested based on X-ray diffraction analyses, while the local structural analyses by extended X-ray absorption fine structure clearly reveals a tilted of TaO6 octahedra in Sr0.5TaO3. It is indicated that planar defects resulting from stacking faults in nanosheet-derived H2Sr1.5Ta3O10 are possibly the cause of the larger tilted of TaO6 octahedra in Sr0.5TaO3 (Ta-O-Ta bond angle (164°)) prepared by nanosheet processing compared with Sr0.5TaO3 (Ta-O-Ta bond angle (169°)) obtained by direct dehydration.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 486, Issues 1â2, 3 November 2009, Pages 78-82
Journal: Journal of Alloys and Compounds - Volume 486, Issues 1â2, 3 November 2009, Pages 78-82
نویسندگان
Keigo Inaba, Shinya Suzuki, Yuji Noguchi, Masaru Miyayama,