کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1527623 1511855 2007 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Dehydration behavior of natural cavansite: An in-situ FTIR and Raman spectroscopic study
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Dehydration behavior of natural cavansite: An in-situ FTIR and Raman spectroscopic study
چکیده انگلیسی

The dehydration behavior of a natural cavansite from Poona (India) was investigated by in-situ FTIR and Raman spectroscopy. The thermal induced variations of the water molecule were followed as indicative of the dehydration process. The total mass loss (about 15.12%) occurred at least in four stages viz., 360 K (2.27%), 470 K (6.30%), 560 K (11.31%) and 760 K (15.11%). The observed spectral variations indicate that cavansite undergoes a completely reversible dehydration at about 500 K without significant structural changes. It completely dehydrates at around 775 K, above which it is in amorphous phase. Induced spectral variations also indicate that the water molecule coordinated with VO5 group is weakly bonded and detached during early stages of dehydration.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Chemistry and Physics - Volume 105, Issues 2–3, 15 October 2007, Pages 395–400
نویسندگان
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