کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1460100 989601 2015 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Soft chemical synthesis and structural characterization of Y2HfxTi2−xO7
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Soft chemical synthesis and structural characterization of Y2HfxTi2−xO7
چکیده انگلیسی

A novel soft chemistry route was developed to synthesize Y2HfxTi2−xO7 (0≤x≤2.0) oxide solid solution. An aqueous solution containing reactants was produced to ensure the combustion reaction taking place at the molecular level. A suite of characterization techniques, including X-ray diffraction, Raman, transmission electron spectroscopy, as well as X-ray absorption near edge structure (XANES), is employed to investigate the structural and phase changes of the series. Both X-ray and electron diffraction patterns show that the Y2HfxTi2−xO7 system undergoes a clear composition-induced phase transition from ordered pyrochlore to disordered defect-fluorite at x~1.5. On the other hand, Raman and XANES spectra reveal a gradual evolution of the local structure with the substitution of Hf for Ti.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 41, Issue 4, May 2015, Pages 5309–5317
نویسندگان
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