کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1525299 | 1511839 | 2010 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
High temperature chemical and physical changes of the HVPE-prepared GaN semiconductor
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
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چکیده انگلیسی
Samples of HVPE-prepared hexagonal gallium nitride GaN were subjected to high temperatures under ammonia in order to induce decomposition. Powder XRD, SEM, and solid-state 69Ga and 71Ga MAS NMR spectroscopy were used to characterize changes in structure and morphology. The major changes were found to include GaN sublimation and decomposition to the elements in the gas phase. No significant Knight shift effect was detected by gallium NMR in striking contrast to the behavior observed earlier in a similar study of GaN nanopowders. The latter could now be linked to crystal growth and recrystallization phenomena that operate efficiently in pyrolyzed nanopowders while being absent or negligible in heated polycrystalline HVPE materials.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Chemistry and Physics - Volume 122, Issues 2–3, 1 August 2010, Pages 537–543
Journal: Materials Chemistry and Physics - Volume 122, Issues 2–3, 1 August 2010, Pages 537–543
نویسندگان
Mariusz Drygas, Miroslaw M. Bucko, Zbigniew Olejniczak, Izabella Grzegory, Jerzy F. Janik,