کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1490170 | 992319 | 2012 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Structure refinement for tantalum nitrides nanocrystals with various morphologies Structure refinement for tantalum nitrides nanocrystals with various morphologies](/preview/png/1490170.png)
Tantalum nitrides (TaNx) nanocrystals with different phase and morphology have been synthesized through homogenous sodium reduction under low temperature with the subsequent annealing process under high vacuum. The crystal structures of tantalum nitrides were determined by Rietveld refinement based on the X-ray diffraction data. The morphologies of various tantalum nitrides nanocrystals in high quality were analyzed through the electron microcopies examinations. The spherical TaN nanoparticles, cuboidal TaN0.83 and TaN0.5 nanocrystals have been selectively prepared at different annealing temperatures. In addition, the specific surface areas of the tantalum nitrides nanocrystals measured by BET method were around 9.87–11.64 m2 g−1, indicating that such nano-sized tantalum nitrides could be suitable for capacitor with high specific capacitance.
Tantalum nitrides nanocrystals with various phases and morphologies for the first time have been synthesized through homogenous sodium reduction under low temperature with the subsequent annealing process under high vacuum.Figure optionsDownload as PowerPoint slideHighlights
► The spherical TaN, cuboidal TaN0.83 and TaN0.5 nanocrystals have been synthesized through homogenous sodium reduction under low temperature with the subsequent annealing process under high vacuum.
► The crystal structures of different tantalum nitrides were determined by Rietveld refinement on the X-ray diffraction data and the examinations of electron microcopies.
► The specific surface area of the tantalum nitrides powders was around 10 m2 g−1.
► Tantalum nitrides powders could be suitable for capacitor with high specific capacitance.
Journal: Materials Research Bulletin - Volume 47, Issue 7, July 2012, Pages 1630–1635