کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
1332796 979053 2006 7 صفحه PDF سفارش دهید دانلود رایگان
عنوان انگلیسی مقاله ISI
Structural and compositional variations in Ta3N5 produced by high-temperature ammonolysis of tantalum oxide
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موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
Structural and compositional variations in Ta3N5 produced by high-temperature ammonolysis of tantalum oxide
چکیده انگلیسی

A series of samples of Ta3N5 (Cmcm  , a=3.89Å, b=10.22Å, c=10.28Å) have been produced by high-temperature ammonolysis of amorphous tantalum oxide under various temperature and heating time regimes. These were characterised by powder diffraction (X-ray and neutron), combustion microanalysis, thermogravimetric analysis and transmission electron microscopy. All samples were found to contain oxide in the 3-coordinate anion site and the b-axis length was sensitive to compositional variation. Samples heated for longer times at higher temperatures were anion deficient. The compositions of the samples have been related to their optical band gap UV–visible spectra. This work highlights the importance of careful compositional analysis when samples of nitride materials are produced for real-world applications.

One crystallographic nitrogen site in Ta3N5 varies markedly in composition with preparation conditions, the effect of this is seen in the b-axis length and optical properties.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Solid State Chemistry - Volume 179, Issue 11, November 2006, Pages 3518–3524
نویسندگان
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