کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1492258 | 992374 | 2008 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Large-scale synthesis of ear-like Si3N4 dendrites from SiO2/Fe composites and Si powders
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Large-scale ear-like Si3N4 dendrites were prepared by the reaction of SiO2/Fe composites and Si powders in N2 atmosphere. The product was characterized by field emission scanning electron microscopy, X-ray diffraction, and transmission electron microscopy. The results reveal that the product mainly consists of ear-like Si3N4 dendrites with crystal structures, which have a length of several microns and a diameter of 100-200Â nm. Nanosized ladder-like Si3N4 was also obtained when changing the Fe content in the SiO2/Fe composites. The Si3N4 nanoladders have a length of hundreds nanometers to several microns and a width of 100-300Â nm. The ear-like Si3N4 dendrites are formed from a two-step growth process, the formation of inner stem structures followed by the epitaxial growth of secondary branches.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Research Bulletin - Volume 43, Issue 7, 1 July 2008, Pages 1858-1864
Journal: Materials Research Bulletin - Volume 43, Issue 7, 1 July 2008, Pages 1858-1864
نویسندگان
Feng Wang, Guo-Qiang Jin, Ying-Yong Wang, Xiang-Yun Guo,