کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1476157 991144 2012 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Structural and thermal properties of boron nitride nanoparticles
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Structural and thermal properties of boron nitride nanoparticles
چکیده انگلیسی

In the present study, our main motivation was to investigate the structural and thermal stability of BN nanoparticles (B1.0N0.9-NPs) produced by spray-pyrolysis (SP) of borazine at 1400 °C by thermogravimetric experiments and X-ray diffraction. We observed that B1.0N0.9-NPs are relatively stable in air below 850 °C in which only oxidation of the NP surface proceeded. Above 850 °C, the powders started to strongly react with air due to bulk oxidation. Under nitrogen, they appeared to be less stable than plate-like BN synthesized from borazine at 1400 °C through conventional pyrolysis. This is related to the low degree of crystallization of B1.0N0.9-NPs that clearly affects their stability. Using a post-pyrolysis treatment at 1400 °C, B1.0N0.9-NPs remained stable up to 1600 °C similarly to plate-like BN. However, above 1600 °C, a relatively fast weight loss occurred for B1.0N0.9-NPs, whereas plate-like BN remained stable up to 1800 °C. This indicated that their lower size also affects their high temperature thermal behavior.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 32, Issue 9, July 2012, Pages 1867–1871
نویسندگان
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